我用我的iOS应用的CollectionView。 每个集合单元包含一个删除按钮。 通过点击按钮，电池应予以删除。 删除后，该空间将充满以下细胞（我不想重装的CollectionView和从顶部重新开始）
如何从UICollectionView删除特定的细胞与自动布局？
Answer 1:
UICollectionView将动画，并自动删除后重新排列细胞。
删除从集合视图中选择项目
[self.collectionView performBatchUpdates:^{
NSArray *selectedItemsIndexPaths = [self.collectionView indexPathsForSelectedItems];
// Delete the items from the data source.
[self deleteItemsFromDataSourceAtIndexPaths:selectedItemsIndexPaths];
// Now delete the items from the collection view.
[self.collectionView deleteItemsAtIndexPaths:selectedItemsIndexPaths];
} completion:nil];
// This method is for deleting the selected images from the data source array
-(void)deleteItemsFromDataSourceAtIndexPaths:(NSArray *)itemPaths
{
NSMutableIndexSet *indexSet = [NSMutableIndexSet indexSet];
for (NSIndexPath *itemPath in itemPaths) {
[indexSet addIndex:itemPath.row];
}
[self.images removeObjectsAtIndexes:indexSet]; // self.images is my data source
}
Answer 2:
提供给UICollectionViewController像的UITableViewController没有委托方法。 我们可以通过添加一个长的手势识别来UICollectionView做手工。
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self
action:@selector(activateDeletionMode:)];
longPress.delegate = self;
[collectionView addGestureRecognizer:longPress];
在longGesture方法添加在那个特定的单元格按钮。
- (void)activateDeletionMode:(UILongPressGestureRecognizer *)gr
{
if (gr.state == UIGestureRecognizerStateBegan) {
if (!isDeleteActive) {
NSIndexPath *indexPath = [collectionView indexPathForItemAtPoint:[gr locationInView:collectionView]];
UICollectionViewCell *cell = [collectionView cellForItemAtIndexPath:indexPath];
deletedIndexpath = indexPath.row;
[cell addSubview:deleteButton];
[deleteButton bringSubviewToFront:collectionView];
}
}
}
在该按钮的动作，
- (void)delete:(UIButton *)sender
{
[self.arrPhotos removeObjectAtIndex:deletedIndexpath];
[deleteButton removeFromSuperview];
[collectionView reloadData];
}
我认为它可以帮助你。
文章来源: Delete cell from UICollectionView without reloading from top [closed]
