Question

这是我的CollectionView Datasource和Delegate的代码....我在单击一个单元格时无法获得响应（在函数didSelectItemAtIndex中设置了断点）....单击单元格时是否显示触摸

#pragma mark - UICollectionViewFlowLayoutDelegate

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(NHBalancedFlowLayout *)collectionViewLayout preferredSizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
    return [[self.images objectAtIndex:indexPath.item] size];
}

#pragma mark - UICollectionViewDataSource

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}

- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section;
{
    return [self.images count];
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath;
{
    ImageCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"ImageCell" forIndexPath:indexPath];
    cell.imageView.image = nil;

    /**
     * Decompress image on background thread before displaying it to prevent lag
     */
    NSInteger rowIndex = indexPath.row;
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        UIImage *image = [UIImage decodedImageWithImage:[self.images objectAtIndex:indexPath.item]];

        dispatch_async(dispatch_get_main_queue(), ^{
            NSIndexPath *currentIndexPathForCell = [collectionView indexPathForCell:cell];
            if (currentIndexPathForCell.row == rowIndex)
            {
                cell.imageView.image = image;
            }
        });
    });
    return cell;
}

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{

}

- (void)collectionView:(UICollectionView *)collectionView didHighlightItemAtIndexPath:(NSIndexPath *)indexPath
{

}

提前致谢：）

Answer 1

很抱歉发布了答案而非评论，但由于声誉，我无法做到。您是否设置了集合视图的delegate和dataSource属性？

无法选择UICollectionViewCellItem

1 个答案: