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Code Issues Projects Releases Wiki Activity

ensure scrolled to the _Very_ bottom.

This commit is contained in:
Michael Kirk 2019-04-22 11:35:26 -07:00
parent fbc0b5f8ee
commit abd4e0dd41
1 changed files with 15 additions and 0 deletions
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15
Signal/src/ViewControllers/Photos/ImagePickerController.swift
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@ -259,6 +259,21 @@ class ImagePickerGridController: UICollectionViewController, PhotoLibraryDelegat
collectionView.setContentOffset(CGPoint(x: 0, y: yOffset), animated: animated)
}
override func scrollViewDidScroll(_ scrollView: UIScrollView) {
if !hasEverAppeared, collectionView.contentOffset.y != lastPageYOffset {
// We initially want the user to be scrolled to the bottom of the media library content.
// However, at least on iOS12, we were finding that when the view finally presented,
// the content was not *quite* to the bottom (~20px above it).
//
// Debugging shows that initially we have the correct offset, but that *something* is
// causing the content to adjust *after* viewWillAppear and viewSafeAreaInsetsDidChange.
// Because that something results in `scrollViewDidScroll` we re-adjust the content
// insets to the bottom.
Logger.debug("adjusting scroll offset back to bottom")
scrollToBottom(animated: false)
}
}
private func reloadDataAndRestoreSelection() {
guard let collectionView = collectionView else {
owsFailDebug("Missing collectionView.")