93 lines
2.4 KiB
Objective-C
93 lines
2.4 KiB
Objective-C
//
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// Copyright (c) 2017 Open Whisper Systems. All rights reserved.
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//
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#import "ConversationCollectionView.h"
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NS_ASSUME_NONNULL_BEGIN
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#pragma mark -
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@implementation ConversationCollectionView
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- (void)setFrame:(CGRect)frame
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{
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BOOL isChanging = !CGSizeEqualToSize(frame.size, self.frame.size);
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if (isChanging) {
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[self.layoutDelegate collectionViewWillChangeLayout];
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}
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[super setFrame:frame];
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if (isChanging) {
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[self.layoutDelegate collectionViewDidChangeLayout];
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}
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}
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- (void)setBounds:(CGRect)bounds
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{
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BOOL isChanging = !CGSizeEqualToSize(bounds.size, self.bounds.size);
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if (isChanging) {
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[self.layoutDelegate collectionViewWillChangeLayout];
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}
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[super setBounds:bounds];
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if (isChanging) {
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[self.layoutDelegate collectionViewDidChangeLayout];
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}
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}
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- (void)setContentOffset:(CGPoint)contentOffset
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{
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if (self.contentSize.height < 1 && CGPointEqualToPoint(CGPointZero, contentOffset)) {
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// [UIScrollView _adjustContentOffsetIfNecessary] resets the content
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// offset to zero under a number of undocumented conditions. We don't
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// want this behavior; we want fine-grained control over the default
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// scroll state of the message view.
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//
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// [UIScrollView _adjustContentOffsetIfNecessary] is called in
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// response to many different events; trying to prevent them all is
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// whack-a-mole.
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//
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// It's not safe to override [UIScrollView _adjustContentOffsetIfNecessary],
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// since its a private API.
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//
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// We can avoid the issue by simply ignoring attempt to reset the content
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// offset to zero before the collection view has determined its content size.
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return;
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}
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[super setContentOffset:contentOffset];
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}
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- (void)reloadData
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{
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DDLogVerbose(@"%@ reloadData", self.logTag);
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[super reloadData];
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}
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- (void)reloadSections:(NSIndexSet *)sections
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{
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DDLogVerbose(@"%@ reloadSections", self.logTag);
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[super reloadSections:sections];
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}
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- (void)reloadItemsAtIndexPaths:(NSArray<NSIndexPath *> *)indexPaths
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{
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DDLogVerbose(@"%@ reloadItemsAtIndexPaths", self.logTag);
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[super reloadItemsAtIndexPaths:indexPaths];
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}
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#pragma mark - Logging
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+ (NSString *)logTag
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{
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return [NSString stringWithFormat:@"[%@]", self.class];
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}
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- (NSString *)logTag
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{
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return self.class.logTag;
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}
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@end
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NS_ASSUME_NONNULL_END
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