1

我有一个 UICollectionView 显示图像缩略图。网格中的每个图像视图都有一个点击手势。我的问题是，我怎样才能抓住被窃听的确切单元格？例如“点击索引#43”。

补充评论

  • 点击手势是通过程序创建的，没有使用故事板。
  • 我在这个项目中启用了 ARC 和 Story Board。

这是我最接近的：

UICollectionViewController

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
                 cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    int row = [indexPath row];

    CollectionViewCell *Cell = [collectionView
        dequeueReusableCellWithReuseIdentifier:@"Cell"
                                  forIndexPath:indexPath];
    // Enable tap gesture on each ImageView
    [Cell.ImageView setUserInteractionEnabled:YES];
    UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture)];
    [tapGesture setNumberOfTouchesRequired:1];
    [tapGesture setNumberOfTapsRequired:1];
    [tapGesture setDelegate:self];
    [Cell.ImageView addGestureRecognizer:tapGesture];

    Cell.ImageView.tag = row; // This tags correctly
}


- (void)tapShowImage // Also, for some reason, 
                     // - (void)handleTapGesture:(UITapGestureRecognizer *)sender
                     // doesn't work. I get an invalid selector error.
{
    NSLog(@"%i", Cell.ImageView.tag);
    // Doesn't work because I can't call Cell.ImageView.tag here.
    // Might be because I"m using SDWebImage to load the image
    // into the ImageView above but not sure.
}
4

1 回答 1

4

您无需为每个单元格添加点击识别器。您可以在 collectionView:didSelectItemAtIndexPath: 方法中获取被点击单元格的 indexPath。

于 2012-12-29T04:29:34.957 回答