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How to use CollectionViewController class

Best Swift-snapshot-testing code snippet using CollectionViewController

PrayerDetailsViewController.swift

Source:PrayerDetailsViewController.swift

1// Sasha Loghozinsky -- alogozinsky@gmail.com \ lohozinsky.o@d2.digital -- 20202import UIKit3class PrayerDetailsCollectionViewController: UIViewController {4    5    convenience init(indexPath: IndexPath, data: [Prayer]) {6        self.init()7        8        self.currentIndexPath = indexPath9        self.data = data10    }11    12    var currentIndexPath: IndexPath?13    var data: [Prayer] = []14    15    let collectionViewController: UICollectionViewController = {16        let collectionViewController = UICollectionViewController(collectionViewLayout: UICollectionViewFlowLayout())17        collectionViewController.collectionView.isPagingEnabled = true18        collectionViewController.collectionView.showsHorizontalScrollIndicator = false19        collectionViewController.collectionView.contentInset = UIEdgeInsets(top: 10, left: 0, bottom: 0, right: 0)20        collectionViewController.collectionView.alpha = 021        return collectionViewController22    }()23    24    let activityIndicatorView: UIActivityIndicatorView = {25        var activityIndicatorView: UIActivityIndicatorView26        27        if #available(iOS 13.0, *) {28            activityIndicatorView = UIActivityIndicatorView(style: .large)29        } else {30            // Fallback on earlier versions31            activityIndicatorView = UIActivityIndicatorView()32        }33        34        return activityIndicatorView35    }()36    let dismissLabel: Button = {37        let button = Button("ÐÐ¾Ð²ÐµÑÐ½ÑÑÐ¸ÑÑ", fontSize: 14, fontColor: .lightGrayCustom)38        button.addTarget(self, action: #selector(dismissViewController), for: .touchUpInside)39        40        return button41    }()42    let dismissButton: UIButton = {43        let button = UIButton()44        let image = UIImage(named: "arrow-down")45        let imageTint = UIImage(named: "arrow-down")?.withRenderingMode(.alwaysTemplate)46        button.setImage(image, for: .normal)47        button.setImage(imageTint, for: .highlighted)48        button.addTarget(self, action: #selector(dismissViewController), for: .touchUpInside)49        50        return button51    }()52    53    override func viewDidLoad() {54        super.viewDidLoad()55        self.collectionViewController.collectionView.delegate = self56        self.collectionViewController.collectionView.dataSource = self57        // Do any additional setup after loading the view.58        self.collectionViewController.collectionView.register(PrayerDetailsCollectionViewCell.self, forCellWithReuseIdentifier: PrayerDetailsCollectionViewCell.reuseIdentifier)59        60        if let layout = self.collectionViewController.collectionView.collectionViewLayout as? UICollectionViewFlowLayout {61            layout.scrollDirection = .horizontal62            layout.minimumLineSpacing = 063            layout.minimumInteritemSpacing = 064        }65        66        if #available(iOS 13.0, *) {67            self.view.addSubviews([self.collectionViewController.collectionView, self.dismissButton, self.activityIndicatorView])68        } else {69            self.view.addSubviews([self.collectionViewController.collectionView, self.dismissLabel, self.dismissButton, self.activityIndicatorView])70        }71        72        self.activityIndicatorView.startAnimating()        73    }74    75    override func viewWillLayoutSubviews() {76        super.viewWillLayoutSubviews()77        setupLayout()78    }79    80    override func viewDidAppear(_ animated: Bool) {81        super.viewDidAppear(animated)82        // Do any additional setup before appearing the view.83        if let indexPath = self.currentIndexPath {84            if let rect = self.collectionViewController.collectionView.layoutAttributesForItem(at: indexPath)?.frame {85                DispatchQueue.main.async {86                    self.collectionViewController.collectionView.scrollRectToVisible(rect, animated: false)87                }88            }89            self.activityIndicatorView.stopAnimating()90            UIView.animate(withDuration: 0.5) {91                self.collectionViewController.collectionView.alpha = 192            }93            self.currentIndexPath = nil94        }95    }96    97    private func setupLayout() {98        self.view.backgroundColor = .white99        if #available(iOS 13.0, *) {100            self.dismissButton.anchor(top: self.view.topAnchor, padding: UIEdgeInsets(top: 8, left: 0, bottom: 0, right: 0), size: CGSize(width: 0, height: 16))101        } else {102            // Fallback on earlier versions103            self.dismissButton.anchor(top: self.view.topAnchor, padding: UIEdgeInsets(top: 48, left: 0, bottom: 0, right: 0), size: CGSize(width: 0, height: 16))104            self.dismissLabel.anchor(leading: self.view.leadingAnchor, bottom: self.dismissButton.topAnchor, trailing: self.view.trailingAnchor, padding: UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0))105        }106        self.dismissButton.centerXAnchor.constraint(equalTo: self.view.centerXAnchor).isActive = true107        self.activityIndicatorView.anchor(centerY: self.view.centerYAnchor, centerX: self.view.centerXAnchor)108        self.collectionViewController.collectionView.backgroundColor = .white109//        self.collectionViewController.collectionView.anchor(top: self.dismissButton.bottomAnchor, leading: self.view.leadingAnchor, bottom: self.view.bottomAnchor, trailing: self.view.trailingAnchor, padding: .zero)110        self.collectionViewController.collectionView.pin.below(of: self.dismissButton).marginTop(0).horizontally().bottom()111    }112    113}114extension PrayerDetailsCollectionViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {115    116    // MARK: UICollectionViewDataSource117    118    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {119        let size = CGSize(width: collectionViewController.collectionView.bounds.size.width, height: collectionViewController.collectionView.bounds.size.height)120        return size121    }122    123    func numberOfSections(in collectionView: UICollectionView) -> Int {124        // #warning Incomplete implementation, return the number of sections125        return 1126    }127    128    ...

WelcomeViewController.swift

Source:WelcomeViewController.swift

...6}7final class WelcomeViewController: UIViewController {8    var viewModel = WelcomeViewModel()9    weak var delegate: WelcomeViewControllerDelegate?10    lazy var collectionViewController: OnboardingCollectionViewController = {11        let layout = UICollectionViewFlowLayout()12        layout.minimumLineSpacing = 013        layout.minimumInteritemSpacing = 014        layout.sectionInset = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)15        layout.scrollDirection = .horizontal16        let collectionViewController = OnboardingCollectionViewController(collectionViewLayout: layout)17        collectionViewController.pages = pages18        collectionViewController.pageControl = pageControl19        collectionViewController.collectionView?.isPagingEnabled = true20        collectionViewController.collectionView?.showsHorizontalScrollIndicator = false21        collectionViewController.collectionView?.backgroundColor = viewModel.backgroundColor22        return collectionViewController23    }()24    let pageControl: UIPageControl = {25        let pageControl = UIPageControl()26        pageControl.translatesAutoresizingMaskIntoConstraints = false27        return pageControl28    }()29    let createWalletButton: UIButton = {30        let button = Button(size: .large, style: .solid)...

AnimeViewController.swift

Source:AnimeViewController.swift

...16        navigationController?.navigationBar.prefersLargeTitles = true;17        navigationController?.navigationBar.shadowImage = UIImage();18        navigationController?.navigationBar.isTranslucent = false;19        20        let collectionViewController = AnimeCollectionViewController();21        addChild(collectionViewController);22        collectionViewController.view.translatesAutoresizingMaskIntoConstraints = false;23        containerView.addSubview(collectionViewController.view);24        collectionViewController.view.constraintToFit(inContainerView: containerView);25        collectionViewController.didMove(toParent: self);26    }27}...

CollectionViewController

Using AI Code Generation

1import UIKit2import SnapshotTesting3class ViewController: UIViewController {4    override func viewDidLoad() {5        super.viewDidLoad()6        let vc = CollectionViewController()7        vc.view.frame = CGRect(x: 0, y: 0, width: 600, height: 600)8        self.view.addSubview(vc.view)9    }10}11import UIKit12import SnapshotTesting13class CollectionViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {14    override func viewDidLoad() {15        super.viewDidLoad()16        let layout = UICollectionViewFlowLayout()17        collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: 600, height: 600), collectionViewLayout: layout)18        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")19        self.view.addSubview(collectionView)20    }21    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {22    }23    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {24        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)25    }26    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {27        return CGSize(width: 100, height: 100)28    }29}30import UIKit31import SnapshotTesting32class CollectionViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {33    override func viewDidLoad() {34        super.viewDidLoad()35        let layout = UICollectionViewFlowLayout()36        collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width:

CollectionViewController

Using AI Code Generation

1import UIKit2import SnapshotTesting3class ViewController: UIViewController {4    override func viewDidLoad() {5        super.viewDidLoad()6        let viewController = CollectionViewController()7        assertSnapshot(matching: viewController, as: .image)8    }9}10import UIKit11import SnapshotTesting12class CollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {13    override func viewDidLoad() {14        super.viewDidLoad()15        let collectionViewLayout = UICollectionViewFlowLayout()16        collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: collectionViewLayout)17        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")18        self.view.addSubview(collectionView)19    }20}21import UIKit22import SnapshotTesting23class CollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {24    override func viewDidLoad() {25        super.viewDidLoad()26        let collectionViewLayout = UICollectionViewFlowLayout()27        collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: collectionViewLayout)28        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")29        self.view.addSubview(collectionView)30    }31    func numberOfSections(in collectionView: UICollectionView) -> Int {32    }33    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {34    }35    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {36        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)37    }38}39import UIKit40import SnapshotTesting41class CollectionViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {42    override func viewDidLoad() {43        super.viewDidLoad()

CollectionViewController

Using AI Code Generation

1import UIKit2import SnapKit3import SwiftSnapshotTesting4class CollectionViewController: UIViewController {5    let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())6    override func viewDidLoad() {7        super.viewDidLoad()8        view.addSubview(collectionView)9        collectionView.snp.makeConstraints { make in10            make.edges.equalToSuperview()11        }12    }13}14import UIKit15import SnapshotTesting16class ViewController: UIViewController {17    override func viewDidLoad() {18        super.viewDidLoad()19        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())20        view.addSubview(collectionView)21        collectionView.snp.makeConstraints { make in22            make.edges.equalToSuperview()23        }24        assertSnapshot(matching: collectionView, as: .image)25    }26}27import UIKit28import SnapshotTesting29class ViewController: UIViewController {30    override func viewDidLoad() {31        super.viewDidLoad()32        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())33        view.addSubview(collectionView)34        collectionView.snp.makeConstraints { make in35            make.edges.equalToSuperview()36        }37        assertSnapshot(matching: view, as: .image)38    }39}40import UIKit41import SnapshotTesting42class ViewController: UIViewController {43    override func viewDidLoad() {44        super.viewDidLoad()45        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())46        view.addSubview(collectionView)47        collectionView.snp.makeConstraints { make in48            make.edges.equalToSuperview()49        }50        assertSnapshot(matching: self, as: .image)51    }52}53import UIKit54import SnapshotTesting55class ViewController: UIViewController {56    override func viewDidLoad() {57        super.viewDidLoad()58        let collectionView = UICollectionView(frame: .zero, collectionViewLayout: UICollectionViewFlowLayout())59        view.addSubview(collectionView)60        collectionView.snp.makeConstraints { make in61            make.edges.equalToSuperview()62        }63        assertSnapshot(matching: self, as: .recursiveDescription)64    }65}66import UIKit67import SnapshotTesting68class ViewController: UIViewController {69    override func viewDidLoad() {

CollectionViewController

Using AI Code Generation

1import SnapshotTesting2import XCTest3class CollectionViewControllerTests: XCTestCase {4    func testCollectionViewController() {5        let vc = CollectionViewController()6        assertSnapshot(matching: vc, as: .image)7    }8}9import UIKit10import XCTest11class CollectionViewController: UICollectionViewController {12    override func viewDidLoad() {13        super.viewDidLoad()14    }15}16import UIKit17import XCTest18class CollectionViewController: UICollectionViewController {19    override func viewDidLoad() {20        super.viewDidLoad()21    }22}23import UIKit24import XCTest25class CollectionViewController: UICollectionViewController {26    override func viewDidLoad() {27        super.viewDidLoad()28    }29}30import UIKit31import XCTest32class CollectionViewController: UICollectionViewController {33    override func viewDidLoad() {34        super.viewDidLoad()35    }36}37import UIKit38import XCTest39class CollectionViewController: UICollectionViewController {40    override func viewDidLoad() {41        super.viewDidLoad()42    }43}44import UIKit45import XCTest46class CollectionViewController: UICollectionViewController {47    override func viewDidLoad() {48        super.viewDidLoad()49    }50}51import UIKit52import XCTest53class CollectionViewController: UICollectionViewController {54    override func viewDidLoad() {55        super.viewDidLoad()56    }57}58import UIKit59import XCTest60class CollectionViewController: UICollectionViewController {61    override func viewDidLoad() {62        super.viewDidLoad()63    }64}

CollectionViewController

Using AI Code Generation

1import CollectionViewController2import SnapshotTesting3import XCTest4class CollectionViewControllerTests: XCTestCase {5    func testExample() {6        let vc = CollectionViewController()7        assertSnapshot(matching: vc, as: .image(on: .iPhoneX))8    }9}10.package(url: "

CollectionViewController

Using AI Code Generation

1import UIKit2import SnapshotTesting3class CollectionViewController: UIViewController {4    override func viewDidLoad() {5        super.viewDidLoad()6        let layout = UICollectionViewFlowLayout()7        let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: 100, height: 100), collectionViewLayout: layout)8        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")9        view.addSubview(collectionView)10    }11}12extension CollectionViewController: UICollectionViewDataSource {13    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {14    }15    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {16        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)17    }18}19extension CollectionViewController: UICollectionViewDelegate {20    func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {21        print(indexPath)22    }23}24extension CollectionViewController: UICollectionViewDelegateFlowLayout {25    func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {26        return CGSize(width: 50, height: 50)27    }28}29let viewController = CollectionViewController()30viewController.view.frame = CGRect(x: 0, y: 0, width: 100, height: 100)31viewController.view.setNeedsLayout()32viewController.view.layoutIfNeeded()33assertSnapshot(matching: viewController, as: .image)34import UIKit35import SnapshotTesting36class CollectionViewController: UIViewController {37    override func viewDidLoad() {38        super.viewDidLoad()39        let layout = UICollectionViewFlowLayout()40        let collectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: 100, height: 100), collectionViewLayout: layout)41        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")42        view.addSubview(collectionView)43    }44}45extension CollectionViewController: UICollectionViewDataSource {46    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {47    }48    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath:

CollectionViewController

Using AI Code Generation

1import UIKit2import SwiftUI3import SnapshotTesting4import XCTest5class CollectionViewController: UIViewController {6    private var currentSnapshot = NSDiffableDataSourceSnapshot<String, Int>()7    override func viewDidLoad() {8        super.viewDidLoad()9        configureHierarchy()10        configureDataSource()11    }12    private func createLayout() -> UICollectionViewLayout {13        let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),14                                              heightDimension: .fractionalHeight(1.0))15        let item = NSCollectionLayoutItem(layoutSize: itemSize)16        let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1.0),17                                               heightDimension: .absolute(44))18        let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize,19        let section = NSCollectionLayoutSection(group: group)20        section.contentInsets = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 20)21        let layout = UICollectionViewCompositionalLayout(section: section)22    }23    private func configureHierarchy() {24        collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: createLayout())25        view.addSubview(collectionView)26    }27    private func configureDataSource() {28        dataSource = UICollectionViewDiffableDataSource<String, Int>(collectionView: collectionView) {29            (collectionView: UICollectionView, indexPath: IndexPath, identifier: Int) -> UICollectionViewCell? in30            guard let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as? UICollectionViewCell else {31                fatalError("Cannot create new cell")32            }33        }34        currentSnapshot.appendSections(["First"])35        currentSnapshot.appendItems(Array(0..<5))36        dataSource.apply(currentSnapshot, animatingDifferences: false)37    }38}39class CollectionViewControllerTests: XCTestCase {40    func testExample() {41        let vc = CollectionViewController()42        vc.viewDidLoad()43        assertSnapshot(matching: vc, as: .image)44    }45}46import UIKit47import SwiftUI48import

CollectionViewController

Using AI Code Generation

1import UIKit2import XCTest3@testable import SwiftSnapshotTesting4class CollectionViewController: UIViewController {5    let layout = UICollectionViewFlowLayout()6    override func viewDidLoad() {7        super.viewDidLoad()8        layout.itemSize = CGSize(width: 100, height: 100)9        collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)10        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: cellIdentifier)11        view.addSubview(collectionView)12        NSLayoutConstraint.activate([13            collectionView.topAnchor.constraint(equalTo: view.topAnchor),14            collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor),15            collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor),16            collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor),17    }18}19extension CollectionViewController: UICollectionViewDataSource {20    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {21    }22    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {23        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdentifier, for: indexPath)24    }25}26class CollectionViewControllerTests: XCTestCase {27    func testCollectionView() {28        let vc = CollectionViewController()29        vc.view.frame = CGRect(x: 0, y: 0, width: 300, height: 300)30        vc.viewDidLoad()31        assertSnapshot(matching: vc, as: .image)32    }33}34import UIKit35import XCTest36@testable import SwiftSnapshotTesting37class ViewController: UIViewController {38    override func viewDidLoad() {39        super.viewDidLoad()40    }41}42class ViewControllerTests: XCTestCase {43    func testViewController() {44        let vc = ViewController()45        vc.view.frame = CGRect(x: 0, y: 0, width: 300, height: 300)46        vc.viewDidLoad()47        assertSnapshot(matching: vc, as: .image)48    }49}50import UIKit51import XCTest52@testable import SwiftSnapshotTesting53import SnapshotTesting54class ViewController: UIViewController {55    override func viewDidLoad() {56        super.viewDidLoad()57    }58}59class ViewControllerTests: XCTestCase {60    func testViewController() {61        let vc = ViewController()

CollectionViewController

Using AI Code Generation

1import UIKit2import SwiftSnapshotTesting3import XCTest4class CollectionViewController: UIViewController, UICollectionViewDataSource {5    override func viewDidLoad() {6        super.viewDidLoad()7        let layout = UICollectionViewFlowLayout()8        collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout)9        collectionView.register(Cell.self, forCellWithReuseIdentifier: "cell")10        view.addSubview(collectionView)11        NSLayoutConstraint.activate([12            collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor),13            collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor),14            collectionView.topAnchor.constraint(equalTo: view.topAnchor),15            collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor),16    }17    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {18    }19    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {20        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! Cell21    }22}23class Cell: UICollectionViewCell {24    let label = UILabel()25    override init(frame: CGRect) {26        super.init(frame: frame)27        label.font = .systemFont(ofSize: 16)28        contentView.addSubview(label)29        NSLayoutConstraint.activate([30            label.leadingAnchor.constraint(equalTo: contentView.leadingAnchor),31            label.trailingAnchor.constraint(equalTo: contentView.trailingAnchor),32            label.topAnchor.constraint(equalTo: contentView.topAnchor),33            label.bottomAnchor.constraint(equalTo: contentView.bottomAnchor),34    }35    required init?(coder aDecoder: NSCoder) {36        fatalError("init(coder:) has not been implemented")37    }38}39class CollectionViewControllerTests: XCTestCase {40    func testCollectionViewController() {41        let vc = CollectionViewController()42        vc.view.frame = CGRect(x: 0, y: 0, width: 375, height: 667)43        vc.view.layoutIfNeeded()44        assertSnapshot(matching: vc, as: .image)45    }46}

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