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Limits paging app screenshots on FeaturedViewController to bottom of cell

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Prioritizes paging featured apps over app screenshots.
This commit is contained in:
Riley Testut
2023-12-08 14:35:36 -06:00
committed by Magesh K
parent 9ea94912d4
commit 0c958dad19
2 changed files with 63 additions and 0 deletions
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62
AltStore/Components/AppCardCollectionViewCell.swift
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@@ -20,9 +20,13 @@ class AppCardCollectionViewCell: UICollectionViewCell
let bannerView: AppBannerView
let captionLabel: UILabel
var prefersPagingScreenshots = true
private let screenshotsCollectionView: UICollectionView
private let stackView: UIStackView
private let topAreaPanGestureRecognizer: UIPanGestureRecognizer
private lazy var dataSource = self.makeDataSource()
private var screenshots: [AppScreenshot] = [] {
@@ -81,6 +85,12 @@ class AppCardCollectionViewCell: UICollectionViewCell
let spacing = (inset * 2) + (minimumItemSpacing * 2)
self.collectionViewAspectRatioConstraint = self.screenshotsCollectionView.widthAnchor.constraint(equalTo: self.screenshotsCollectionView.heightAnchor, multiplier: multiplier, constant: spacing)
// Allows us to ignore swipes in top portion of screenshotsCollectionView.
self.topAreaPanGestureRecognizer = UIPanGestureRecognizer(target: nil, action: nil)
self.topAreaPanGestureRecognizer.cancelsTouchesInView = false
self.topAreaPanGestureRecognizer.delaysTouchesBegan = false
self.topAreaPanGestureRecognizer.delaysTouchesEnded = false
super.init(frame: frame)
self.contentView.clipsToBounds = true
@@ -101,6 +111,10 @@ class AppCardCollectionViewCell: UICollectionViewCell
tapGestureRecognizer.delaysTouchesEnded = false
self.screenshotsCollectionView.addGestureRecognizer(tapGestureRecognizer)
self.topAreaPanGestureRecognizer.delegate = self
self.screenshotsCollectionView.panGestureRecognizer.require(toFail: self.topAreaPanGestureRecognizer)
self.screenshotsCollectionView.addGestureRecognizer(self.topAreaPanGestureRecognizer)
self.screenshotsCollectionView.register(AppScreenshotCollectionViewCell.self, forCellWithReuseIdentifier: RSTCellContentGenericCellIdentifier)
self.stackView.isLayoutMarginsRelativeArrangement = true
@@ -324,3 +338,51 @@ extension AppCardCollectionViewCell
}
}
}
extension AppCardCollectionViewCell: UIGestureRecognizerDelegate
{
override func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool
{
// Never recognize topAreaPanGestureRecognizer unless prefersPagingScreenshots is false.
guard !self.prefersPagingScreenshots else { return false }
let point = gestureRecognizer.location(in: self.screenshotsCollectionView)
// Top area = Top 3/4
let isTopArea = point.y < (self.screenshotsCollectionView.bounds.height / 4) * 3
return isTopArea
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldBeRequiredToFailBy otherGestureRecognizer: UIGestureRecognizer) -> Bool
{
guard let panGestureRecognizer = otherGestureRecognizer as? UIPanGestureRecognizer, let view = panGestureRecognizer.view else { return false }
if view.isDescendant(of: self.screenshotsCollectionView)
{
// Only allow nested gesture recognizers if topAreaPanGestureRecognizer fails.
return true
}
else
{
// Always allow parent gesture recognizers.
return false
}
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool
{
guard let panGestureRecognizer = otherGestureRecognizer as? UIPanGestureRecognizer, let view = panGestureRecognizer.view else { return true }
if view.isDescendant(of: self.screenshotsCollectionView)
{
// Don't recognize topAreaPanGestureRecognizer alongside nested gesture recognizers.
return false
}
else
{
// Allow recognizing simultaneously with parent gesture recognizers.
// This fixes accidentally breaking scrolling in parent.
return true
}
}
}