iphone - 单击任何UIImage并在Objective-C中打开UIImageView

Question

我在以下站点上获得了此解决方案:Click an UIImage and open an UIImageView in Objective-c

将UITapGestureRecognizer添加到您的UIImageView中:

UITapGestureRecognizer *tapRecognizer;
tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(yourSelector)];
[thumbnail addGestureRecognizer:tapRecognizer];
[tapRecognizer release];

thumbnail.userInteractionEnabled = YES; // very important for UIImageView

这对于单个ImageView来说效果很好，但是我要在我的scrollView中添加多个(大约20个)，然后如何区分用户将要点击或选择的ImageView。我试图设置自己的@selector(imageClicked)，但它只返回最后一个imageView的标签。

我在循环中添加addGestureRecognizer，因为我在imageView中动态加载了20个静态图像。

Answer 1

这可能有帮助

for(int i=0;i<20;i++)
{
    UIImageView *img=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"yourimage.png"]];
    [img setTag:i];
    img.frame= //set frame accordingly;
    img.userInteractionEnabled = YES;
    UITapGestureRecognizer *tap =
    [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTap:)];
    [img addGestureRecognizer:tap];
    [tap release];
    [scrollView addSubView:img];
}

- (void)handleTap:(UITapGestureRecognizer *)recognizer  {
    UIImageView *imageView = (UIImageView *)recognizer.view;

      switch([imageView tag])
    {
       case 1:
          //do your work
          break;
       .
       .
       .
       .
       case n:

    }
}