signalapp/Signal-iOS
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Revisit the [UIScrollView _adjustContentOffsetIfNecessary] issue. Fix glitches in the initial scroll state in message view. Don't reset scroll state when returning to the message view.

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// FREEBIE
This commit is contained in:
Matthew Chen 2017-08-29 11:18:17 -04:00
parent 7f717c0ca6
commit 997cd2ef2b
1 changed files with 4 additions and 1 deletions
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5
Signal/src/ViewControllers/ConversationView/MessagesViewController.m
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@ -641,6 +641,7 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
[self.view layoutSubviews];
// We want to set the initial scroll state the first time we enter the view.
if (!self.viewHasEverAppeared) {
[self scrollToDefaultPosition];
}
@ -3514,7 +3515,9 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
{
if (self.collectionView.contentSize.height < 1) {
// If the collection view hasn't determined its content size yet,
// scroll state is not yet coherent.
// scroll state is not yet coherent. Therefore we can't (and don't
// need to) determine whether we're "scrolled to the bottom" until
// the collection view has determined its content size.
return NO;
}