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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // | ||
| // CardAnimator.swift | ||
| // Starbucks | ||
| // | ||
| // Created by Supakit Thanadittagorn on 22/12/19. | ||
| // Copyright © 2019 pop. All rights reserved. | ||
| // | ||
|
|
||
| import UIKit | ||
|
|
||
| class CardAnimator: NSObject, UIViewControllerAnimatedTransitioning { | ||
| func transitionDuration(using transitionContext: UIViewControllerContextTransitioning?) -> TimeInterval { | ||
| 3 | ||
| } | ||
|
|
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| func animateTransition(using transitionContext: UIViewControllerContextTransitioning) { | ||
| let containerView = transitionContext.containerView | ||
|
|
||
| guard let fromVC = transitionContext.viewController(forKey: .from) as? CardController, | ||
| let toVC = transitionContext.viewController(forKey: .to) as? CardDetailViewController, | ||
| let cardView = fromVC.selectedView() else { return } | ||
|
|
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| cardView.alpha = 0 | ||
|
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| let fromViewSnapshot = fromVC.view.snapshotView(afterScreenUpdates: true)! | ||
| let cardBackgroundSnapshot = cardView.backgroundImageView.snapshotView(afterScreenUpdates: false)! | ||
| let cardTitleSnapshot = cardView.titleLabel.snapshotView(afterScreenUpdates: false)! | ||
| let cardSubTitleSnapshot = cardView.subTitleLabel.snapshotView(afterScreenUpdates: false)! | ||
|
|
||
| cardBackgroundSnapshot.frame = cardView.convert(cardView.backgroundImageView.frame, to: fromVC.view) | ||
| cardTitleSnapshot.frame = cardView.convert(cardView.titleLabel.frame, to: fromVC.view) | ||
| cardSubTitleSnapshot.frame = cardView.convert(cardView.subTitleLabel.frame, to: fromVC.view) | ||
|
|
||
| containerView.addSubview(fromViewSnapshot) | ||
| containerView.addSubview(cardBackgroundSnapshot) | ||
| containerView.addSubview(cardTitleSnapshot) | ||
| containerView.addSubview(cardSubTitleSnapshot) | ||
|
|
||
| let toView: UIView = toVC.view | ||
| toView.layoutIfNeeded() | ||
|
|
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| let gradientSnapshot = toVC.gradientView.snapshotView(afterScreenUpdates: true)! | ||
| let sheetViewSnapshot = toVC.contentBackgroundView.snapshotView(afterScreenUpdates: true)! | ||
| sheetViewSnapshot.frame = CGRect( | ||
| origin: CGPoint(x: 0, y: fromVC.view.frame.size.height), | ||
| size: toVC.contentBackgroundView.frame.size | ||
| ) | ||
| toView.alpha = 0 | ||
| gradientSnapshot.alpha = 0 | ||
| containerView.addSubview(toView) | ||
| containerView.addSubview(gradientSnapshot) | ||
| containerView.addSubview(sheetViewSnapshot) | ||
|
|
||
| UIView.animate(withDuration: 3, animations: { | ||
|
|
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| cardBackgroundSnapshot.frame = self.frame(for: cardBackgroundSnapshot, scaleTo: toVC.backgroundImageView) | ||
| cardTitleSnapshot.frame = self.frame(for: cardTitleSnapshot, usingPositionFrom: toVC.numberLabel) | ||
| cardSubTitleSnapshot.frame = self.frame(for: cardSubTitleSnapshot, usingPositionFrom: toVC.amountLabel) | ||
| sheetViewSnapshot.frame = toVC.contentBackgroundView.frame | ||
| fromViewSnapshot.alpha = 0 | ||
| gradientSnapshot.alpha = 1 | ||
| }, completion: { _ in | ||
| toView.alpha = 1 | ||
| cardView.alpha = 1 | ||
| fromViewSnapshot.removeFromSuperview() | ||
| cardBackgroundSnapshot.removeFromSuperview() | ||
| cardTitleSnapshot.removeFromSuperview() | ||
| cardSubTitleSnapshot.removeFromSuperview() | ||
| sheetViewSnapshot.removeFromSuperview() | ||
| gradientSnapshot.removeFromSuperview() | ||
| transitionContext.completeTransition(true) | ||
| }) | ||
| } | ||
|
|
||
| func frame(for l: UIView, usingPositionFrom r: UIView) -> CGRect { | ||
| CGRect( | ||
| origin: CGPoint(x: r.frame.origin.x, y: r.frame.origin.y + statusBarFrameHeightFromWindow(for: l)), | ||
| size: l.frame.size | ||
| ) | ||
| } | ||
|
|
||
| func frame(for l: UIView, scaleTo r: UIView) -> CGRect { | ||
| let h = r.frame.size.width / l.frame.size.width * l.frame.size.height | ||
| return CGRect( | ||
| origin: CGPoint(x: 0, y: 250 - h), | ||
| size: CGSize(width: r.frame.size.width, height: h) | ||
| ) | ||
| } | ||
|
|
||
| func statusBarFrameHeightFromWindow(for view: UIView) -> CGFloat { | ||
| view.window?.windowScene?.statusBarManager?.statusBarFrame.height ?? 0.0 | ||
| } | ||
| } | ||
|
|
||
| extension UIView { | ||
| /// Replacement of `snapshotView` on iOS 10. Fixes the issue of `snapshotView` returning a blank white screen. | ||
| func snapshotImageView() -> UIImageView? { | ||
| UIGraphicsBeginImageContext(bounds.size) | ||
| guard let context = UIGraphicsGetCurrentContext() else { | ||
| return nil | ||
| } | ||
|
|
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| layer.render(in: context) | ||
|
|
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| let viewImage = UIGraphicsGetImageFromCurrentImageContext() | ||
| UIGraphicsEndImageContext() | ||
|
|
||
| return UIImageView(image: viewImage, highlightedImage: viewImage) | ||
| } | ||
| } |
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