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[ios] fix internal scroll scrolling to the top

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When the user starts scrolling to the top from the halfscreen position the internal scroll continues scrolling the table even if the content offset is zero. This commit fixes it.

Signed-off-by: Kiryl Kaveryn <kirylkaveryn@gmail.com>
This commit is contained in:
Kiryl Kaveryn 2025-03-21 12:56:54 +04:00
parent 5451160965
commit 106961931e
Signed by: kirylkaveryn
SSH key fingerprint: SHA256:P3swI85Rc1ZoE8vyL28Oa6+FgRIaOwsjkKyqcVZ0NtY
3 changed files with 21 additions and 2 deletions
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13
iphone/Maps/UI/Search/SearchOnMap/SearchOnMapViewController.swift
View file

@ -7,6 +7,7 @@ protocol SearchOnMapView: AnyObject {
@objc
protocol SearchOnMapScrollViewDelegate: AnyObject {
func scrollViewDidScroll(_ scrollView: UIScrollView)
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)
}
@objc
@ -463,8 +464,11 @@ extension SearchOnMapViewController: UIGestureRecognizerDelegate {
}
func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
if gestureRecognizer is UIPanGestureRecognizer && otherGestureRecognizer is UIPanGestureRecognizer {
// threshold is used to soften transition from the internal scroll zero content offset
internalScrollViewContentOffset < Constants.panGestureThreshold
return internalScrollViewContentOffset < Constants.panGestureThreshold
}
return false
}
}
@ -480,4 +484,11 @@ extension SearchOnMapViewController: SearchOnMapScrollViewDelegate {
}
internalScrollViewContentOffset = scrollView.contentOffset.y
}
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
// lock internal scroll view when the user fast scrolls screen to the top
if internalScrollViewContentOffset == 0 {
targetContentOffset.pointee = .zero
}
}
}

4
iphone/Maps/UI/Search/Tabs/CategoriesTab/SearchCategoriesViewController.swift
View file

@ -45,6 +45,10 @@ final class SearchCategoriesViewController: MWMTableViewController {
delegate?.scrollViewDidScroll(scrollView)
}
override func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
delegate?.scrollViewWillEndDragging(scrollView, withVelocity: velocity, targetContentOffset: targetContentOffset)
}
func category(at indexPath: IndexPath) -> String {
let index = indexPath.row
return categories[index]

4
iphone/Maps/UI/Search/Tabs/SearchTabViewController.swift
View file

@ -63,6 +63,10 @@ extension SearchTabViewController: SearchOnMapScrollViewDelegate {
func scrollViewDidScroll(_ scrollView: UIScrollView) {
delegate?.scrollViewDidScroll(scrollView)
}
func scrollViewWillEndDragging(_ scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>) {
delegate?.scrollViewWillEndDragging(scrollView, withVelocity: velocity, targetContentOffset: targetContentOffset)
}
}
extension SearchTabViewController: SearchCategoriesViewControllerDelegate {