Add image gallery to articles #41
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,179 @@ | ||
| // | ||
| // CustomScrollView.swift | ||
| // ArticleFeature | ||
| // | ||
| // Created by Виталий Канин on 11.03.2025. | ||
| // | ||
|
|
||
| import SwiftUI | ||
| import UIKit | ||
|
||
| import Models | ||
|
|
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| struct CustomScrollView: UIViewRepresentable { | ||
|
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| let imageElement: [URL] | ||
| @Binding var selectedIndex: Int | ||
| @Binding var isZooming: Bool | ||
| @Binding var isTouched: Bool | ||
| @Binding var backgroundOpacity: Double | ||
| var onClose: (() -> Void)? | ||
|
|
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| func makeUIView(context: Context) -> UICollectionView { | ||
|
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| let layout = UICollectionViewFlowLayout() | ||
| layout.scrollDirection = .horizontal | ||
| layout.minimumLineSpacing = 0 | ||
| layout.itemSize = UIScreen.main.bounds.size | ||
|
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| let collectionView = UICollectionView(frame: .zero, collectionViewLayout: layout) | ||
| collectionView.isPagingEnabled = true | ||
| collectionView.showsHorizontalScrollIndicator = false | ||
| collectionView.showsVerticalScrollIndicator = false | ||
| collectionView.backgroundColor = .clear | ||
| collectionView.dataSource = context.coordinator | ||
| collectionView.delegate = context.coordinator | ||
| collectionView.backgroundColor = .black | ||
| collectionView.register(ImageCollectionViewCell.self, forCellWithReuseIdentifier: "ImageCollectionViewCell") | ||
|
|
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| let panGesture = UIPanGestureRecognizer(target: context.coordinator, action: #selector(Coordinator.handleVerticalSwipe(_:))) | ||
| panGesture.delegate = context.coordinator as any UIGestureRecognizerDelegate | ||
| collectionView.addGestureRecognizer(panGesture) | ||
|
|
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| return collectionView | ||
| } | ||
|
|
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| func updateUIView(_ uiView: UICollectionView, context: Context) { | ||
| let indexPath = IndexPath(item: selectedIndex, section: 0) | ||
| DispatchQueue.main.async { | ||
|
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| uiView.scrollToItem(at: indexPath, at: .centeredHorizontally, animated: false) | ||
| } | ||
| } | ||
|
|
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| func makeCoordinator() -> Coordinator { | ||
| Coordinator(self) | ||
| } | ||
|
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| class Coordinator: NSObject, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, UIGestureRecognizerDelegate{ | ||
| var parent: CustomScrollView | ||
| private var initialTouchPoint: CGPoint = .zero | ||
| private var firstSwipeDirection: SwipeDirection = .none | ||
|
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| enum SwipeDirection { | ||
| case horizontal | ||
| case vertical | ||
| case none | ||
| } | ||
|
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| init(_ parent: CustomScrollView) { | ||
| self.parent = parent | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { | ||
| return parent.imageElement.count | ||
| } | ||
|
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| func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell { | ||
| let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "ImageCollectionViewCell", for: indexPath) as! ImageCollectionViewCell | ||
| cell.setImage(url: parent.imageElement[indexPath.item]) | ||
|
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| cell.onZoom = { isZooming in | ||
| DispatchQueue.main.async { | ||
|
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| self.parent.isZooming = isZooming | ||
| } | ||
| } | ||
|
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| cell.onToolBar = { | ||
| DispatchQueue.main.async { | ||
|
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| self.parent.isTouched.toggle() | ||
| } | ||
| } | ||
| return cell | ||
| } | ||
|
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| func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) { | ||
| let pageIndex = Int(scrollView.contentOffset.x / scrollView.bounds.width) | ||
| self.parent.selectedIndex = pageIndex | ||
| scrollView.gestureRecognizers!.last!.isEnabled = true | ||
|
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| firstSwipeDirection = .none | ||
| } | ||
|
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| @objc func handleVerticalSwipe(_ gesture: UIPanGestureRecognizer) { | ||
| guard let collectionView = gesture.view as? UICollectionView else { return } | ||
| guard let visibleCell = collectionView.visibleCells.first as? ImageCollectionViewCell else { return } | ||
| let translation = gesture.translation(in: gesture.view?.superview) | ||
| if parent.isZooming { return } | ||
|
|
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| switch gesture.state { | ||
| case .began: | ||
| initialTouchPoint = gesture.location(in: gesture.view?.superview) | ||
| case .changed: | ||
| if abs(translation.y) > abs(translation.x) && firstSwipeDirection == .vertical { | ||
| collectionView.isScrollEnabled = false | ||
| visibleCell.transform = CGAffineTransform(translationX: 0, y: translation.y) | ||
| self.parent.backgroundOpacity = max(0.1, 1 - Double(abs(translation.y * 5) / 700)) | ||
| collectionView.layer.opacity = max(0.1, 1 - Float(abs(translation.y * 2.5) / 700)) | ||
| } | ||
| case .ended, .cancelled: | ||
| if abs(translation.y) > 150 { | ||
| parent.onClose?() | ||
| UIView.animate(withDuration: 0.6, | ||
| delay: 0, | ||
| usingSpringWithDamping: 0.8, | ||
| initialSpringVelocity: 0.3, | ||
| options: .curveEaseInOut, | ||
| animations: { | ||
| self.parent.backgroundOpacity = 0.0 | ||
| collectionView.layer.opacity = 0.0 | ||
| }) | ||
| } else { | ||
| UIView.animate(withDuration: 0.6, | ||
| delay: 0, | ||
| usingSpringWithDamping: 0.8, | ||
| initialSpringVelocity: 0.3, | ||
| options: .curveEaseInOut, | ||
| animations: { | ||
| visibleCell.transform = CGAffineTransform(translationX: 0, y: 0) | ||
| self.parent.backgroundOpacity = 1.0 | ||
| collectionView.layer.opacity = 1.0 | ||
| }) | ||
| } | ||
| firstSwipeDirection = .none | ||
| collectionView.isScrollEnabled = true | ||
| case .failed: | ||
| print("failed") | ||
|
||
| case .possible: | ||
| print("possible") | ||
| @unknown default: | ||
| break | ||
| } | ||
| } | ||
|
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| func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool { | ||
| guard let collection = otherGestureRecognizer.view as? UICollectionView else { | ||
| return false | ||
| } | ||
|
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| if parent.imageElement.count == 1 { | ||
| firstSwipeDirection = .vertical | ||
| return true | ||
| } | ||
|
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| if let panGesture = gestureRecognizer as? UIPanGestureRecognizer { | ||
| let velocity = panGesture.velocity(in: panGesture.view) | ||
| if firstSwipeDirection == .none { | ||
| if abs(velocity.x) > abs(velocity.y) { | ||
| firstSwipeDirection = .horizontal | ||
| collection.isScrollEnabled = true | ||
| panGesture.isEnabled = false // | ||
| } else if abs(velocity.x) < abs(velocity.y) { | ||
| firstSwipeDirection = .vertical | ||
| otherGestureRecognizer.isEnabled = true | ||
| collection.isScrollEnabled = false | ||
| } | ||
| } | ||
| } | ||
|
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| return true | ||
| } | ||
| } | ||
| } | ||
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Пустая локализация, скорее всего надо просто завернуть вызов в String