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How to use traitCollectionDidChange method of CancellingWKWebViewNavigationDelegate class

Best Swift-snapshot-testing code snippet using CancellingWKWebViewNavigationDelegate.traitCollectionDidChange

SnapshotTestingTests.swift

Source:SnapshotTestingTests.swift

...392            self.bottomLabel.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor),393            self.bottomLabel.centerXAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerXAnchor),394            ])395        }396        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {397          super.traitCollectionDidChange(previousTraitCollection)398          self.topLabel.font = .preferredFont(forTextStyle: .headline, compatibleWith: self.traitCollection)399          self.leadingLabel.font = .preferredFont(forTextStyle: .body, compatibleWith: self.traitCollection)400          self.trailingLabel.font = .preferredFont(forTextStyle: .body, compatibleWith: self.traitCollection)401          self.bottomLabel.font = .preferredFont(forTextStyle: .subheadline, compatibleWith: self.traitCollection)402          self.view.setNeedsUpdateConstraints()403          self.view.updateConstraintsIfNeeded()404        }405      }406      let viewController = MyViewController()407      #if os(iOS)408      assertSnapshot(matching: viewController, as: .image(on: .iPhoneSe), named: "iphone-se")409      assertSnapshot(matching: viewController, as: .image(on: .iPhone8), named: "iphone-8")410      assertSnapshot(matching: viewController, as: .image(on: .iPhone8Plus), named: "iphone-8-plus")411      assertSnapshot(matching: viewController, as: .image(on: .iPhoneX), named: "iphone-x")412      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXr), named: "iphone-xr")413      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXsMax), named: "iphone-xs-max")414      assertSnapshot(matching: viewController, as: .image(on: .iPadMini), named: "ipad-mini")415      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7), named: "ipad-9-7")416      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2), named: "ipad-10-2")417      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5), named: "ipad-pro-10-5")418      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11), named: "ipad-pro-11")419      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9), named: "ipad-pro-12-9")420      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhoneSe), named: "iphone-se")421      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhone8), named: "iphone-8")422      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhone8Plus), named: "iphone-8-plus")423      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhoneX), named: "iphone-x")424      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhoneXr), named: "iphone-xr")425      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPhoneXsMax), named: "iphone-xs-max")426      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPadMini), named: "ipad-mini")427      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPad9_7), named: "ipad-9-7")428      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPad10_2), named: "ipad-10-2")429      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPadPro10_5), named: "ipad-pro-10-5")430      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPadPro11), named: "ipad-pro-11")431      assertSnapshot(matching: viewController, as: .recursiveDescription(on: .iPadPro12_9), named: "ipad-pro-12-9")432      assertSnapshot(matching: viewController, as: .image(on: .iPhoneSe(.portrait)), named: "iphone-se")433      assertSnapshot(matching: viewController, as: .image(on: .iPhone8(.portrait)), named: "iphone-8")434      assertSnapshot(matching: viewController, as: .image(on: .iPhone8Plus(.portrait)), named: "iphone-8-plus")435      assertSnapshot(matching: viewController, as: .image(on: .iPhoneX(.portrait)), named: "iphone-x")436      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXr(.portrait)), named: "iphone-xr")437      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXsMax(.portrait)), named: "iphone-xs-max")438      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.landscape)), named: "ipad-mini")439      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.landscape)), named: "ipad-9-7")440      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.landscape)), named: "ipad-10-2")441      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.landscape)), named: "ipad-pro-10-5")442      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.landscape)), named: "ipad-pro-11")443      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.landscape)), named: "ipad-pro-12-9")444      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.landscape(splitView: .oneThird))), named: "ipad-mini-33-split-landscape")445      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.landscape(splitView: .oneHalf))), named: "ipad-mini-50-split-landscape")446      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.landscape(splitView: .twoThirds))), named: "ipad-mini-66-split-landscape")447      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.portrait(splitView: .oneThird))), named: "ipad-mini-33-split-portrait")448      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.portrait(splitView: .twoThirds))), named: "ipad-mini-66-split-portrait")449      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.landscape(splitView: .oneThird))), named: "ipad-9-7-33-split-landscape")450      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.landscape(splitView: .oneHalf))), named: "ipad-9-7-50-split-landscape")451      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.landscape(splitView: .twoThirds))), named: "ipad-9-7-66-split-landscape")452      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.portrait(splitView: .oneThird))), named: "ipad-9-7-33-split-portrait")453      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.portrait(splitView: .twoThirds))), named: "ipad-9-7-66-split-portrait")454      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.landscape(splitView: .oneThird))), named: "ipad-10-2-split-landscape")455      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.landscape(splitView: .oneHalf))), named: "ipad-10-2-50-split-landscape")456      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.landscape(splitView: .twoThirds))), named: "ipad-10-2-66-split-landscape")457      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.portrait(splitView: .oneThird))), named: "ipad-10-2-33-split-portrait")458      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.portrait(splitView: .twoThirds))), named: "ipad-10-2-66-split-portrait")459      460      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.landscape(splitView: .oneThird))), named: "ipad-pro-10inch-33-split-landscape")461      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.landscape(splitView: .oneHalf))), named: "ipad-pro-10inch-50-split-landscape")462      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.landscape(splitView: .twoThirds))), named: "ipad-pro-10inch-66-split-landscape")463      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.portrait(splitView: .oneThird))), named: "ipad-pro-10inch-33-split-portrait")464      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.portrait(splitView: .twoThirds))), named: "ipad-pro-10inch-66-split-portrait")465      466      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.landscape(splitView: .oneThird))), named: "ipad-pro-11inch-33-split-landscape")467      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.landscape(splitView: .oneHalf))), named: "ipad-pro-11inch-50-split-landscape")468      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.landscape(splitView: .twoThirds))), named: "ipad-pro-11inch-66-split-landscape")469      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.portrait(splitView: .oneThird))), named: "ipad-pro-11inch-33-split-portrait")470      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.portrait(splitView: .twoThirds))), named: "ipad-pro-11inch-66-split-portrait")471      472      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.landscape(splitView: .oneThird))), named: "ipad-pro-12inch-33-split-landscape")473      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.landscape(splitView: .oneHalf))), named: "ipad-pro-12inch-50-split-landscape")474      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.landscape(splitView: .twoThirds))), named: "ipad-pro-12inch-66-split-landscape")475      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.portrait(splitView: .oneThird))), named: "ipad-pro-12inch-33-split-portrait")476      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.portrait(splitView: .twoThirds))), named: "ipad-pro-12inch-66-split-portrait")477      478      assertSnapshot(479        matching: viewController, as: .image(on: .iPhoneSe(.landscape)), named: "iphone-se-alternative")480      assertSnapshot(481        matching: viewController, as: .image(on: .iPhone8(.landscape)), named: "iphone-8-alternative")482      assertSnapshot(483        matching: viewController, as: .image(on: .iPhone8Plus(.landscape)), named: "iphone-8-plus-alternative")484      assertSnapshot(485        matching: viewController, as: .image(on: .iPhoneX(.landscape)), named: "iphone-x-alternative")486      assertSnapshot(487        matching: viewController, as: .image(on: .iPhoneXr(.landscape)), named: "iphone-xr-alternative")488      assertSnapshot(489        matching: viewController, as: .image(on: .iPhoneXsMax(.landscape)), named: "iphone-xs-max-alternative")490      assertSnapshot(491        matching: viewController, as: .image(on: .iPadMini(.portrait)), named: "ipad-mini-alternative")492      assertSnapshot(493        matching: viewController, as: .image(on: .iPad9_7(.portrait)), named: "ipad-9-7-alternative")494      assertSnapshot(495        matching: viewController, as: .image(on: .iPad10_2(.portrait)), named: "ipad-10-2-alternative")496      assertSnapshot(497        matching: viewController, as: .image(on: .iPadPro10_5(.portrait)), named: "ipad-pro-10-5-alternative")498      assertSnapshot(499        matching: viewController, as: .image(on: .iPadPro11(.portrait)), named: "ipad-pro-11-alternative")500      assertSnapshot(501        matching: viewController, as: .image(on: .iPadPro12_9(.portrait)), named: "ipad-pro-12-9-alternative")502      allContentSizes.forEach { name, contentSize in503          assertSnapshot(504            matching: viewController,505            as: .image(on: .iPhoneSe, traits: .init(preferredContentSizeCategory: contentSize)),506            named: "iphone-se-\(name)"507          )508      }509      #elseif os(tvOS)510      assertSnapshot(511        matching: viewController, as: .image(on: .tv), named: "tv")512      assertSnapshot(513        matching: viewController, as: .image(on: .tv4K), named: "tv4k")514      #endif515    }516    #endif517  }518  func testTraitsEmbeddedInTabNavigation() {519    #if os(iOS)520    if #available(iOS 11.0, *) {521      class MyViewController: UIViewController {522        let topLabel = UILabel()523        let leadingLabel = UILabel()524        let trailingLabel = UILabel()525        let bottomLabel = UILabel()526        override func viewDidLoad() {527          super.viewDidLoad()528          self.navigationItem.leftBarButtonItem = .init(barButtonSystemItem: .add, target: nil, action: nil)529          self.view.backgroundColor = .white530          self.topLabel.text = "What's"531          self.leadingLabel.text = "the"532          self.trailingLabel.text = "point"533          self.bottomLabel.text = "?"534          self.topLabel.translatesAutoresizingMaskIntoConstraints = false535          self.leadingLabel.translatesAutoresizingMaskIntoConstraints = false536          self.trailingLabel.translatesAutoresizingMaskIntoConstraints = false537          self.bottomLabel.translatesAutoresizingMaskIntoConstraints = false538          self.view.addSubview(self.topLabel)539          self.view.addSubview(self.leadingLabel)540          self.view.addSubview(self.trailingLabel)541          self.view.addSubview(self.bottomLabel)542          NSLayoutConstraint.activate([543            self.topLabel.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor),544            self.topLabel.centerXAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerXAnchor),545            self.leadingLabel.leadingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leadingAnchor),546            self.leadingLabel.trailingAnchor.constraint(lessThanOrEqualTo: self.view.safeAreaLayoutGuide.centerXAnchor),547//            self.leadingLabel.trailingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerXAnchor),548            self.leadingLabel.centerYAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerYAnchor),549            self.trailingLabel.leadingAnchor.constraint(greaterThanOrEqualTo: self.view.safeAreaLayoutGuide.centerXAnchor),550            self.trailingLabel.trailingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.trailingAnchor),551            self.trailingLabel.centerYAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerYAnchor),552            self.bottomLabel.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor),553            self.bottomLabel.centerXAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.centerXAnchor),554            ])555        }556        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {557          super.traitCollectionDidChange(previousTraitCollection)558          self.topLabel.font = .preferredFont(forTextStyle: .headline, compatibleWith: self.traitCollection)559          self.leadingLabel.font = .preferredFont(forTextStyle: .body, compatibleWith: self.traitCollection)560          self.trailingLabel.font = .preferredFont(forTextStyle: .body, compatibleWith: self.traitCollection)561          self.bottomLabel.font = .preferredFont(forTextStyle: .subheadline, compatibleWith: self.traitCollection)562          self.view.setNeedsUpdateConstraints()563          self.view.updateConstraintsIfNeeded()564        }565      }566      let myViewController = MyViewController()567      let navController = UINavigationController(rootViewController: myViewController)568      let viewController = UITabBarController()569      viewController.setViewControllers([navController], animated: false)570      assertSnapshot(matching: viewController, as: .image(on: .iPhoneSe), named: "iphone-se")571      assertSnapshot(matching: viewController, as: .image(on: .iPhone8), named: "iphone-8")572      assertSnapshot(matching: viewController, as: .image(on: .iPhone8Plus), named: "iphone-8-plus")573      assertSnapshot(matching: viewController, as: .image(on: .iPhoneX), named: "iphone-x")574      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXr), named: "iphone-xr")575      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXsMax), named: "iphone-xs-max")576      assertSnapshot(matching: viewController, as: .image(on: .iPadMini), named: "ipad-mini")577      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7), named: "ipad-9-7")578      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2), named: "ipad-10-2")579      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5), named: "ipad-pro-10-5")580      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11), named: "ipad-pro-11")581      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9), named: "ipad-pro-12-9")582      assertSnapshot(matching: viewController, as: .image(on: .iPhoneSe(.portrait)), named: "iphone-se")583      assertSnapshot(matching: viewController, as: .image(on: .iPhone8(.portrait)), named: "iphone-8")584      assertSnapshot(matching: viewController, as: .image(on: .iPhone8Plus(.portrait)), named: "iphone-8-plus")585      assertSnapshot(matching: viewController, as: .image(on: .iPhoneX(.portrait)), named: "iphone-x")586      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXr(.portrait)), named: "iphone-xr")587      assertSnapshot(matching: viewController, as: .image(on: .iPhoneXsMax(.portrait)), named: "iphone-xs-max")588      assertSnapshot(matching: viewController, as: .image(on: .iPadMini(.landscape)), named: "ipad-mini")589      assertSnapshot(matching: viewController, as: .image(on: .iPad9_7(.landscape)), named: "ipad-9-7")590      assertSnapshot(matching: viewController, as: .image(on: .iPad10_2(.landscape)), named: "ipad-10-2")591      assertSnapshot(matching: viewController, as: .image(on: .iPadPro10_5(.landscape)), named: "ipad-pro-10-5")592      assertSnapshot(matching: viewController, as: .image(on: .iPadPro11(.landscape)), named: "ipad-pro-11")593      assertSnapshot(matching: viewController, as: .image(on: .iPadPro12_9(.landscape)), named: "ipad-pro-12-9")594      assertSnapshot(595        matching: viewController, as: .image(on: .iPhoneSe(.landscape)), named: "iphone-se-alternative")596      assertSnapshot(597        matching: viewController, as: .image(on: .iPhone8(.landscape)), named: "iphone-8-alternative")598      assertSnapshot(599        matching: viewController, as: .image(on: .iPhone8Plus(.landscape)), named: "iphone-8-plus-alternative")600      assertSnapshot(601        matching: viewController, as: .image(on: .iPhoneX(.landscape)), named: "iphone-x-alternative")602      assertSnapshot(603        matching: viewController, as: .image(on: .iPhoneXr(.landscape)), named: "iphone-xr-alternative")604      assertSnapshot(605        matching: viewController, as: .image(on: .iPhoneXsMax(.landscape)), named: "iphone-xs-max-alternative")606      assertSnapshot(607        matching: viewController, as: .image(on: .iPadMini(.portrait)), named: "ipad-mini-alternative")608      assertSnapshot(609        matching: viewController, as: .image(on: .iPad9_7(.portrait)), named: "ipad-9-7-alternative")610      assertSnapshot(611        matching: viewController, as: .image(on: .iPad10_2(.portrait)), named: "ipad-10-2-alternative")612      assertSnapshot(613        matching: viewController, as: .image(on: .iPadPro10_5(.portrait)), named: "ipad-pro-10-5-alternative")614      assertSnapshot(615        matching: viewController, as: .image(on: .iPadPro11(.portrait)), named: "ipad-pro-11-alternative")616      assertSnapshot(617        matching: viewController, as: .image(on: .iPadPro12_9(.portrait)), named: "ipad-pro-12-9-alternative")618    }619    #endif620  }621  func testCollectionViewsWithMultipleScreenSizes() {622    #if os(iOS)623    final class CollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {624      let flowLayout: UICollectionViewFlowLayout = {625        let layout = UICollectionViewFlowLayout()626        layout.scrollDirection = .horizontal627        layout.minimumLineSpacing = 20628        return layout629      }()630      lazy var collectionView = UICollectionView(frame: .zero, collectionViewLayout: flowLayout)631      override func viewDidLoad() {632        super.viewDidLoad()633        view.backgroundColor = .white634        view.addSubview(collectionView)635        collectionView.backgroundColor = .white636        collectionView.dataSource = self637        collectionView.delegate = self638        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "Cell")639        collectionView.translatesAutoresizingMaskIntoConstraints = false640        NSLayoutConstraint.activate([641          collectionView.leadingAnchor.constraint(equalTo: view.layoutMarginsGuide.leadingAnchor),642          collectionView.topAnchor.constraint(equalTo: view.layoutMarginsGuide.topAnchor),643          collectionView.trailingAnchor.constraint(equalTo: view.layoutMarginsGuide.trailingAnchor),644          collectionView.bottomAnchor.constraint(equalTo: view.layoutMarginsGuide.bottomAnchor)645        ])646        collectionView.reloadData()647      }648      override func viewDidLayoutSubviews() {649        super.viewDidLayoutSubviews()650        collectionView.collectionViewLayout.invalidateLayout()651      }652      override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {653        super.traitCollectionDidChange(previousTraitCollection)654        collectionView.collectionViewLayout.invalidateLayout()655      }656      func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {657        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)658        cell.contentView.backgroundColor = .orange659        return cell660      }661      func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {662        return 20663      }664      func collectionView(665        _ collectionView: UICollectionView,666        layout collectionViewLayout: UICollectionViewLayout,667        sizeForItemAt indexPath: IndexPath...

SnapshotKitTests.swift

Source:SnapshotKitTests.swift

...369            override func viewDidLayoutSubviews() {370                super.viewDidLayoutSubviews()371                collectionView.collectionViewLayout.invalidateLayout()372            }373            override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {374                super.traitCollectionDidChange(previousTraitCollection)375                collectionView.collectionViewLayout.invalidateLayout()376            }377            func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {378                let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath)379                cell.contentView.backgroundColor = .orange380                return cell381            }382            func collectionView(_: UICollectionView, numberOfItemsInSection _: Int) -> Int {383                20384            }385            func collectionView(386                _ collectionView: UICollectionView,387                layout _: UICollectionViewLayout,388                sizeForItemAt _: IndexPath389            ) -> CGSize {390                CGSize(391                    width: min(collectionView.frame.width - 50, 300),392                    height: collectionView.frame.height393                )394            }395        }396        let viewController = CollectionViewController()397        assertSnapshots(matching: viewController, as: [398            "ipad": .image(on: .iPadPro12_9),399            "iphoneSe": .image(on: .iPhoneSe),400            "iphone8": .image(on: .iPhone8),401            "iphoneMax": .image(on: .iPhoneXsMax)402        ])403    }404    func testUIView() {405        let view = UIView()406        view.frame = .init(origin: .zero, size: .init(width: 20, height: 20))407        view.backgroundColor = .cyan408        view.layer.cornerRadius = 10409        assertSnapshot(matching: view, as: .image)410        assertSnapshot(matching: view, as: .recursiveDescription)411    }412    func testUIViewController() {413        let view = UIView()414        view.backgroundColor = .cyan415        view.layer.cornerRadius = 10416        view.translatesAutoresizingMaskIntoConstraints = false417        let viewController = UIViewController()418        viewController.view.addSubview(view)419        NSLayoutConstraint.activate([420            view.topAnchor.constraint(equalTo: viewController.view.topAnchor),421            view.bottomAnchor.constraint(equalTo: viewController.view.bottomAnchor),422            view.leftAnchor.constraint(equalTo: viewController.view.leftAnchor),423            view.rightAnchor.constraint(equalTo: viewController.view.rightAnchor)424        ])425        assertSnapshot(matching: viewController, as: .image(size: .init(width: 100, height: 100)))426    }427    func testUIViewControllerLifeCycle() {428        class ViewController: UIViewController {429            let viewDidLoadExpectation: XCTestExpectation430            let viewWillAppearExpectation: XCTestExpectation431            let viewDidAppearExpectation: XCTestExpectation432            let viewWillDisappearExpectation: XCTestExpectation433            let viewDidDisappearExpectation: XCTestExpectation434            init(435                viewDidLoadExpectation: XCTestExpectation,436                viewWillAppearExpectation: XCTestExpectation,437                viewDidAppearExpectation: XCTestExpectation,438                viewWillDisappearExpectation: XCTestExpectation,439                viewDidDisappearExpectation: XCTestExpectation440            ) {441                self.viewDidLoadExpectation = viewDidLoadExpectation442                self.viewWillAppearExpectation = viewWillAppearExpectation443                self.viewDidAppearExpectation = viewDidAppearExpectation444                self.viewWillDisappearExpectation = viewWillDisappearExpectation445                self.viewDidDisappearExpectation = viewDidDisappearExpectation446                super.init(nibName: nil, bundle: nil)447            }448            @available(*, unavailable)449            required init?(coder _: NSCoder) {450                fatalError("init(coder:) has not been implemented")451            }452            override func viewDidLoad() {453                super.viewDidLoad()454                viewDidLoadExpectation.fulfill()455            }456            override func viewWillAppear(_ animated: Bool) {457                super.viewWillAppear(animated)458                viewWillAppearExpectation.fulfill()459            }460            override func viewDidAppear(_ animated: Bool) {461                super.viewDidAppear(animated)462                viewDidAppearExpectation.fulfill()463            }464            override func viewWillDisappear(_ animated: Bool) {465                super.viewWillDisappear(animated)466                viewWillDisappearExpectation.fulfill()467            }468            override func viewDidDisappear(_ animated: Bool) {469                super.viewDidDisappear(animated)470                viewDidDisappearExpectation.fulfill()471            }472        }473        let viewDidLoadExpectation = expectation(description: "viewDidLoad")474        let viewWillAppearExpectation = expectation(description: "viewWillAppear")475        let viewDidAppearExpectation = expectation(description: "viewDidAppear")476        let viewWillDisappearExpectation = expectation(description: "viewWillDisappear")477        let viewDidDisappearExpectation = expectation(description: "viewDidDisappear")478        viewWillAppearExpectation.expectedFulfillmentCount = 2479        viewDidAppearExpectation.expectedFulfillmentCount = 2480        viewWillDisappearExpectation.expectedFulfillmentCount = 2481        viewDidDisappearExpectation.expectedFulfillmentCount = 2482        let viewController = ViewController(483            viewDidLoadExpectation: viewDidLoadExpectation,484            viewWillAppearExpectation: viewWillAppearExpectation,485            viewDidAppearExpectation: viewDidAppearExpectation,486            viewWillDisappearExpectation: viewWillDisappearExpectation,487            viewDidDisappearExpectation: viewDidDisappearExpectation488        )489        assertSnapshot(matching: viewController, as: .image)490        assertSnapshot(matching: viewController, as: .image)491        wait(492            for: [493                viewDidLoadExpectation,494                viewWillAppearExpectation,495                viewDidAppearExpectation,496                viewWillDisappearExpectation,497                viewDidDisappearExpectation498            ],499            timeout: 1,500            enforceOrder: true501        )502    }503    func testCALayer() {504        let layer = CALayer()505        layer.frame = CGRect(x: 0, y: 0, width: 100, height: 100)506        layer.backgroundColor = UIColor.red.cgColor507        layer.borderWidth = 4.0508        layer.borderColor = UIColor.black.cgColor509        assertSnapshot(matching: layer, as: .image)510    }511    func testCALayerWithGradient() {512        let baseLayer = CALayer()513        baseLayer.frame = CGRect(x: 0, y: 0, width: 100, height: 100)514        let gradientLayer = CAGradientLayer()515        gradientLayer.colors = [UIColor.red.cgColor, UIColor.yellow.cgColor]516        gradientLayer.frame = baseLayer.frame517        baseLayer.addSublayer(gradientLayer)518        assertSnapshot(matching: baseLayer, as: .image(subpixelThreshold: 1))519    }520    func testViewControllerHierarchy() {521        let page = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal)522        page.setViewControllers([UIViewController()], direction: .forward, animated: false)523        let tab = UITabBarController()524        tab.viewControllers = [525            UINavigationController(rootViewController: page),526            UINavigationController(rootViewController: UIViewController()),527            UINavigationController(rootViewController: UIViewController()),528            UINavigationController(rootViewController: UIViewController()),529            UINavigationController(rootViewController: UIViewController())530        ]531        assertSnapshot(matching: tab, as: .hierarchy)532    }533    #endif534    #if os(iOS) || os(tvOS)535    func testUIBezierPath() {536        let path = UIBezierPath.heart537        let osName: String538        #if os(iOS)539        osName = "iOS"540        #elseif os(tvOS)541        osName = "tvOS"542        #endif543        assertSnapshot(matching: path, as: .image, named: osName)544        assertSnapshot(matching: path, as: .elementsDescription, named: osName)545    }546    #endif547    func testURLRequest() {548        var get = URLRequest(url: URL(string: "https://www.pointfree.co/")!)549        get.addValue("pf_session={}", forHTTPHeaderField: "Cookie")550        get.addValue("text/html", forHTTPHeaderField: "Accept")551        get.addValue("application/json", forHTTPHeaderField: "Content-Type")552        assertSnapshot(matching: get, as: .raw, named: "get")553        assertSnapshot(matching: get, as: .curl, named: "get-curl")554        var getWithQuery = URLRequest(url: URL(string: "https://www.pointfree.co?key_2=value_2&key_1=value_1&key_3=value_3")!)555        getWithQuery.addValue("pf_session={}", forHTTPHeaderField: "Cookie")556        getWithQuery.addValue("text/html", forHTTPHeaderField: "Accept")557        getWithQuery.addValue("application/json", forHTTPHeaderField: "Content-Type")558        assertSnapshot(matching: getWithQuery, as: .raw, named: "get-with-query")559        assertSnapshot(matching: getWithQuery, as: .curl, named: "get-with-query-curl")560        var post = URLRequest(url: URL(string: "https://www.pointfree.co/subscribe")!)561        post.httpMethod = "POST"562        post.addValue("pf_session={\"user_id\":\"0\"}", forHTTPHeaderField: "Cookie")563        post.addValue("text/html", forHTTPHeaderField: "Accept")564        post.httpBody = Data("pricing[billing]=monthly&pricing[lane]=individual".utf8)565        assertSnapshot(matching: post, as: .raw, named: "post")566        assertSnapshot(matching: post, as: .curl, named: "post-curl")567        var postWithJSON = URLRequest(url: URL(string: "http://dummy.restapiexample.com/api/v1/create")!)568        postWithJSON.httpMethod = "POST"569        postWithJSON.addValue("application/json", forHTTPHeaderField: "Content-Type")570        postWithJSON.addValue("application/json", forHTTPHeaderField: "Accept")571        postWithJSON.httpBody = Data("{\"name\":\"tammy134235345235\", \"salary\":0, \"age\":\"tammy133\"}".utf8)572        assertSnapshot(matching: postWithJSON, as: .raw, named: "post-with-json")573        assertSnapshot(matching: postWithJSON, as: .curl, named: "post-with-json-curl")574        var head = URLRequest(url: URL(string: "https://www.pointfree.co/")!)575        head.httpMethod = "HEAD"576        head.addValue("pf_session={}", forHTTPHeaderField: "Cookie")577        assertSnapshot(matching: head, as: .raw, named: "head")578        assertSnapshot(matching: head, as: .curl, named: "head-curl")579        post = URLRequest(url: URL(string: "https://www.pointfree.co/subscribe")!)580        post.httpMethod = "POST"581        post.addValue("pf_session={\"user_id\":\"0\"}", forHTTPHeaderField: "Cookie")582        post.addValue("application/json", forHTTPHeaderField: "Accept")583        post.httpBody = Data("""584        {"pricing": {"lane": "individual","billing": "monthly"}}585        """.utf8)586        _assertInlineSnapshot(matching: post, as: .raw(pretty: true), with: """587        POST https://www.pointfree.co/subscribe588        Accept: application/json589        Cookie: pf_session={"user_id":"0"}590        {591          "pricing" : {592            "billing" : "monthly",593            "lane" : "individual"594          }595        }596        """)597    }598    #if os(iOS) || os(macOS)599    func testWebView() throws {600        let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)601            .deletingLastPathComponent()602            .appendingPathComponent("__Fixtures__/pointfree.html")603        let html = try String(contentsOf: fixtureUrl)604        let webView = WKWebView()605        webView.loadHTMLString(html, baseURL: nil)606        assertSnapshot(607            matching: webView,608            as: .image(precision: 0.9, size: .init(width: 800, height: 600)),609            named: platform610        )611    }612    #endif613    #if os(iOS) || os(tvOS)614    func testViewWithZeroHeightOrWidth() {615        var rect = CGRect(x: 0, y: 0, width: 350, height: 0)616        var view = UIView(frame: rect)617        view.backgroundColor = .red618        assertSnapshot(matching: view, as: .image, named: "noHeight")619        rect = CGRect(x: 0, y: 0, width: 0, height: 350)620        view = UIView(frame: rect)621        view.backgroundColor = .green622        assertSnapshot(matching: view, as: .image, named: "noWidth")623        rect = CGRect(x: 0, y: 0, width: 0, height: 0)624        view = UIView(frame: rect)625        view.backgroundColor = .blue626        assertSnapshot(matching: view, as: .image, named: "noWidth.noHeight")627    }628    #endif629    #if os(iOS)630    func testEmbeddedWebView() throws {631        let label = UILabel()632        label.text = "Hello, Blob!"633        let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)634            .deletingLastPathComponent()635            .appendingPathComponent("__Fixtures__/pointfree.html")636        let html = try String(contentsOf: fixtureUrl)637        let webView = WKWebView()638        webView.loadHTMLString(html, baseURL: nil)639        webView.isHidden = true640        let stackView = UIStackView(arrangedSubviews: [label, webView])641        stackView.axis = .vertical642        assertSnapshot(643            matching: stackView,644            as: .image(size: .init(width: 800, height: 600)),645            named: platform646        )647    }648    #endif649    #if os(iOS) || os(macOS)650    final class ManipulatingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {651        func webView(_ webView: WKWebView, didFinish _: WKNavigation!) {652            webView.evaluateJavaScript("document.body.children[0].classList.remove(\"hero\")") // Change layout653        }654    }655    func testWebViewWithManipulatingNavigationDelegate() throws {656        let manipulatingWKWebViewNavigationDelegate = ManipulatingWKWebViewNavigationDelegate()657        let webView = WKWebView()658        webView.navigationDelegate = manipulatingWKWebViewNavigationDelegate659        let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)660            .deletingLastPathComponent()661            .appendingPathComponent("__Fixtures__/pointfree.html")662        let html = try String(contentsOf: fixtureUrl)663        webView.loadHTMLString(html, baseURL: nil)664        assertSnapshot(665            matching: webView,666            as: .image(precision: 0.9, size: .init(width: 800, height: 600)),667            named: platform668        )669        _ = manipulatingWKWebViewNavigationDelegate670    }671    final class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {672        func webView(673            _: WKWebView,674            decidePolicyFor _: WKNavigationAction,675            decisionHandler: @escaping (WKNavigationActionPolicy) -> Void676        ) {677            decisionHandler(.cancel)678        }679    }680    func testWebViewWithCancellingNavigationDelegate() throws {681        let cancellingWKWebViewNavigationDelegate = CancellingWKWebViewNavigationDelegate()682        let webView = WKWebView()683        webView.navigationDelegate = cancellingWKWebViewNavigationDelegate684        let fixtureUrl = URL(fileURLWithPath: String(#file), isDirectory: false)685            .deletingLastPathComponent()686            .appendingPathComponent("__Fixtures__/pointfree.html")687        let html = try String(contentsOf: fixtureUrl)688        webView.loadHTMLString(html, baseURL: nil)689        assertSnapshot(690            matching: webView,691            as: .image(size: .init(width: 800, height: 600)),692            named: platform693        )694        _ = cancellingWKWebViewNavigationDelegate695    }696    #endif697    #if os(iOS)698    @available(iOS 13.0, *)699    func testSwiftUIView_iOS() {700        let view = TestView().environment(\.colorScheme, .light)701        let precision: Float = 0.99702        assertSnapshot(matching: view, as: .image(precision: precision, traits: .init(userInterfaceStyle: .light)))703        assertSnapshot(matching: view, as: .image(precision: precision, layout: .sizeThatFits, traits: .init(userInterfaceStyle: .light)), named: "size-that-fits")704        assertSnapshot(matching: view, as: .image(precision: precision, layout: .fixed(width: 200, height: 100), traits: .init(userInterfaceStyle: .light)), named: "fixed")705        assertSnapshot(matching: view, as: .image(precision: precision, layout: .device(config: .iPhoneSe), traits: .init(userInterfaceStyle: .light)), named: "device")706    }707    #endif708    #if os(macOS)709    @available(macOS 11.0, *)710    func testSwiftUIView_macOS() {711        let view = TestView().environment(\.colorScheme, .light)712        assertSnapshot(matching: view, as: .image(size: .init(width: 100, height: 50), precision: 0.98))713    }714    #endif715    #if os(tvOS)716    @available(tvOS 13.0, *)717    func testSwiftUIView_tvOS() {718        let view = TestView().environment(\.colorScheme, .light)719        let precision: Float = 0.98720        assertSnapshot(matching: view, as: .image(precision: precision))721        assertSnapshot(matching: view, as: .image(precision: precision, layout: .sizeThatFits), named: "size-that-fits")722        assertSnapshot(matching: view, as: .image(precision: precision, layout: .fixed(width: 300, height: 100)), named: "fixed")723        assertSnapshot(matching: view, as: .image(precision: precision, layout: .device(config: .tv)), named: "device")724    }725    #endif726}727#if os(iOS) || os(tvOS)728class TestViewController: UIViewController {729    override func viewDidLoad() {730        super.viewDidLoad()731        let topView = UIView()732        let leadingView = UIView()733        let trailingView = UIView()734        let bottomView = UIView()735        navigationItem.leftBarButtonItem = .init(barButtonSystemItem: .add, target: nil, action: nil)736        view.backgroundColor = .white737        topView.backgroundColor = .blue738        leadingView.backgroundColor = .green739        trailingView.backgroundColor = .red740        bottomView.backgroundColor = .magenta741        topView.translatesAutoresizingMaskIntoConstraints = false742        leadingView.translatesAutoresizingMaskIntoConstraints = false743        trailingView.translatesAutoresizingMaskIntoConstraints = false744        bottomView.translatesAutoresizingMaskIntoConstraints = false745        view.addSubview(topView)746        view.addSubview(leadingView)747        view.addSubview(trailingView)748        view.addSubview(bottomView)749        let constant: CGFloat = 50750        NSLayoutConstraint.activate([751            topView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),752            topView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),753            topView.widthAnchor.constraint(equalToConstant: constant),754            topView.heightAnchor.constraint(equalToConstant: constant),755            leadingView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),756            leadingView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),757            leadingView.widthAnchor.constraint(equalToConstant: constant),758            leadingView.heightAnchor.constraint(equalToConstant: constant),759            trailingView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),760            trailingView.centerYAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerYAnchor),761            trailingView.widthAnchor.constraint(equalToConstant: constant),762            trailingView.heightAnchor.constraint(equalToConstant: constant),763            bottomView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor),764            bottomView.centerXAnchor.constraint(equalTo: view.safeAreaLayoutGuide.centerXAnchor),765            bottomView.widthAnchor.constraint(equalToConstant: constant),766            bottomView.heightAnchor.constraint(equalToConstant: constant)767        ])768    }769    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {770        super.traitCollectionDidChange(previousTraitCollection)771        view.setNeedsUpdateConstraints()772        view.updateConstraintsIfNeeded()773    }774}775#endif776#if canImport(SwiftUI)777@available(iOS 13.0, macOS 11.0, tvOS 13.0, *)778private struct TestView: SwiftUI.View {779    var body: some SwiftUI.View {780        HStack {781            SwiftUI.Image(systemName: "checkmark.circle.fill")782            Text("Checked").fixedSize()783        }784        .padding(5)...

traitCollectionDidChange

Using AI Code Generation

1override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {2    super.traitCollectionDidChange(previousTraitCollection)3    if traitCollection.forceTouchCapability == .available {4        registerForPreviewing(with: self, sourceView: view)5    }6}7override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {8    super.traitCollectionDidChange(previousTraitCollection)9    if traitCollection.forceTouchCapability == .available {10        registerForPreviewing(with: self, sourceView: view)11    }12}13override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {14    super.traitCollectionDidChange(previousTraitCollection)15    if traitCollection.forceTouchCapability == .available {16        registerForPreviewing(with: self, sourceView: view)17    }18}19override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {20    super.traitCollectionDidChange(previousTraitCollection)21    if traitCollection.forceTouchCapability == .available {22        registerForPreviewing(with: self, sourceView: view)23    }24}25override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {26    super.traitCollectionDidChange(previousTraitCollection)27    if traitCollection.forceTouchCapability == .available {28        registerForPreviewing(with: self, sourceView: view)29    }30}31override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {32    super.traitCollectionDidChange(previousTraitCollection)33    if traitCollection.forceTouchCapability == .available {34        registerForPreviewing(with: self, sourceView: view)35    }36}37override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {38    super.traitCollectionDidChange(previousTraitCollection)39    if traitCollection.forceTouchCapability == .available {40        registerForPreviewing(with: self, sourceView: view)41    }42}

traitCollectionDidChange

Using AI Code Generation

1import UIKit2import WebKit3class ViewController: UIViewController {4    override func viewDidLoad() {5        super.viewDidLoad()6        delegate = CancellingWKWebViewNavigationDelegate()7    }8    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {9        super.traitCollectionDidChange(previousTraitCollection)10        if traitCollection.userInterfaceStyle == .dark {11            delegate.cancel()12        }13    }14}15import Foundation16import WebKit17class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {18    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {19        print("didStartProvisionalNavigation")20    }21    func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {22        print("didCommit")23    }24    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {25        print("didFinish")26    }27    func cancel() {28        print("cancel")29    }30}

traitCollectionDidChange

Using AI Code Generation

1override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {2    super.traitCollectionDidChange(previousTraitCollection)3    if traitCollection.userInterfaceStyle == .dark {4    } else {5    }6}7override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {8    super.traitCollectionDidChange(previousTraitCollection)9    if traitCollection.userInterfaceStyle == .dark {10    } else {11    }12}13override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {14    super.traitCollectionDidChange(previousTraitCollection)15    if traitCollection.userInterfaceStyle == .dark {16    } else {17    }18}19override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {20    super.traitCollectionDidChange(previousTraitCollection)21    if traitCollection.userInterfaceStyle == .dark {22    } else {23    }24}25override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {26    super.traitCollectionDidChange(previousTraitCollection)27    if traitCollection.userInterfaceStyle == .dark {28    } else {29    }30}31override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {32    super.traitCollectionDidChange(previousTraitCollection)33    if traitCollection.userInterfaceStyle == .dark {34    } else {35    }36}37override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {38    super.traitCollectionDidChange(previousTraitCollection)39    if traitCollection.userInterfaceStyle == .dark {

traitCollectionDidChange

Using AI Code Generation

1override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {2    super.traitCollectionDidChange(previousTraitCollection)3    guard let previousTraitCollection = previousTraitCollection else { return }4    guard let currentTraitCollection = self.traitCollection else { return }5    if previousTraitCollection.forceTouchCapability != currentTraitCollection.forceTouchCapability {6        switch currentTraitCollection.forceTouchCapability {7            print("Force Touch available")8            print("Force Touch not available")9            print("Force Touch unknown")10        }11    }12}13override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {14    super.traitCollectionDidChange(previousTraitCollection)15    guard let previousTraitCollection = previousTraitCollection else { return }16    guard let currentTraitCollection = self.traitCollection else { return }17    if previousTraitCollection.forceTouchCapability != currentTraitCollection.forceTouchCapability {18        switch currentTraitCollection.forceTouchCapability {19            print("Force Touch available")20            print("Force Touch not available")21            print("Force Touch unknown")22        }23    }24}25override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {26    super.traitCollectionDidChange(previousTraitCollection)27    guard let previousTraitCollection = previousTraitCollection else { return }28    guard let currentTraitCollection = self.traitCollection else { return }29    if previousTraitCollection.forceTouchCapability != currentTraitCollection.forceTouchCapability {30        switch currentTraitCollection.forceTouchCapability {31            print("Force Touch available")32            print("Force Touch not available")33            print("Force Touch unknown")34        }35    }36}37override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {38    super.traitCollectionDidChange(previousTraitCollection)39    guard let previousTraitCollection = previousTraitCollection else { return }40    guard let currentTraitCollection = self.traitCollection else { return }

traitCollectionDidChange

Using AI Code Generation

1class ViewController: UIViewController {2    override func viewDidLoad() {3        super.viewDidLoad()4        let webview = CancellingWKWebViewNavigationDelegate()5        self.view.addSubview(webview)6    }7}8class CancellingWKWebViewNavigationDelegate: WKWebView, WKNavigationDelegate {9    override init(frame: CGRect, configuration: WKWebViewConfiguration) {10        super.init(frame: frame, configuration: configuration)11    }12    required init?(coder: NSCoder) {13        super.init(coder: coder)14    }15    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {16        print("didStartProvisionalNavigation")17    }18    func webView(_ webView: WKWebView, didReceiveServerRedirectForProvisionalNavigation navigation: WKNavigation!) {19        print("didReceiveServerRedirectForProvisionalNavigation")20    }21    func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {22        print("didFailProvisionalNavigation")23    }24    func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {25        print("didCommit")26    }27    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {28        print("didFinish")29    }30    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {31        print("didFail")32    }33    func webViewWebContentProcessDidTerminate(_ webView: WKWebView) {34        print("webViewWebContentProcessDidTerminate")35    }36    func webView(_ webView: WKWebView, didReceive challenge: URLAuthenticationChallenge, completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {37        print("didReceive")38    }39}40I have a WKWebView with a custom WKNavigationDelegate. I want to display a loading indicator when the WKWebView is loading content. I have tried to achieve this by implementing the webView(webView: WKWebView

traitCollectionDidChange

Using AI Code Generation

1    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {2        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {3            super.traitCollectionDidChange(previousTraitCollection)4        }5    }6    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {7        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {8            super.traitCollectionDidChange(previousTraitCollection)9        }10    }11    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {12        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {13            super.traitCollectionDidChange(previousTraitCollection)14        }15    }16    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {17        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {18            super.traitCollectionDidChange(previousTraitCollection)19        }20    }21    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {22        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {23            super.traitCollectionDidChange(previousTraitCollection)24        }25    }26    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {27        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {28            super.traitCollectionDidChange(previousTraitCollection)29        }30    }31    class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {32        override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {33            super.traitCollectionDidChange(previousTraitCollection)

traitCollectionDidChange

Using AI Code Generation

1class MyViewController: UIViewController {2    override func viewDidLoad() {3        super.viewDidLoad()4        let webViewConfig = WKWebViewConfiguration()5        webViewConfig.websiteDataStore = WKWebsiteDataStore.nonPersistent()6        webView = WKWebView(frame: CGRect.zero, configuration: webViewConfig)7        webView.navigationDelegate = CancellingWKWebViewNavigationDelegate()8        view.addSubview(webView)9    }10    override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {11        super.traitCollectionDidChange(previousTraitCollection)12        if previousTraitCollection?.preferredContentSizeCategory != traitCollection.preferredContentSizeCategory {13        }14    }15}16class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {17    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {18        decisionHandler(.cancel)19    }20}

traitCollectionDidChange

Using AI Code Generation

1import UIKit2import WebKit3class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate {4    override func viewDidLoad() {5        super.viewDidLoad()6        webConfig = WKWebViewConfiguration()7        webViewNavigationDelegate = CancellingWKWebViewNavigationDelegate()8        webView = WKWebView(frame: view.bounds, configuration: webConfig)9        view.addSubview(webView)10        let request = URLRequest(url: url!)11        webView.load(request)12    }13}14class CancellingWKWebViewNavigationDelegate: NSObject, WKNavigationDelegate {15    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {16        decisionHandler(isCancelled ? .cancel : .allow)17    }18    func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {19        decisionHandler(isCancelled ? .cancel : .allow)20    }21}22import UIKit23import WebKit24class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate {25    override func viewDidLoad() {26        super.viewDidLoad()27        webConfig = WKWebViewConfiguration()28        webViewNavigationDelegate = CancellingWKWebViewNavigationDelegate()29        webView = WKWebView(frame: view.bounds, configuration: webConfig)30        view.addSubview(webView)31        let request = URLRequest(url: url!)32        webView.load(request)33    }34    override func traitCollectionDidChange(_ previousTraitCollection: UIT

Automation Testing Tutorials

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