问题描述

我有几个 UIImageView，每个都有一个标签；我有一个图像数组，我想做的是:当用户点击其中一个 UIImageView 时，应用程序会返回数组中的某个图像.

i have several UIImageView, each of them has a tag; and I have an array of Images, what i want to do is: when user tap one of the UIImageView, the app give back the certain Image from array.

我是这样实现的:

- (void)viewDidLoad 
{
    [super viewDidLoad];
    scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
    [self.view addSubview:scroll];

    NSInteger i;
    for (i=0; i<8; i++) 
    {
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, i*100 + i*15, 300, 100)];
        imageView.backgroundColor = [UIColor blueColor];
        imageView.userInteractionEnabled = YES;
        imageView.tag = i;

        NSLog(@"%d", imageView.tag);

        [scroll addSubview:imageView];

        UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(findOutTheTag:)];
        [imageView addGestureRecognizer:tap];

    }

    scroll.contentSize = CGSizeMake(320, 115*i);

}
- (void)findOutTheTag:(id)sender
{

    //  HOW TO FIND THE tag OF THE imageView I'M TAPPING?

}

我想找出imageView.tag，并将imageView.tag传给

UIImageView *tappedImage = [imageArray objectAtIndex:imageView.tag];

显示图像.

我确实标记了所有这些，问题是我如何找出我正在点击的 imageView 的 tag?谢谢阅读^_^

I did tag all of them, question is how I can find out the tag of the imageView I'm tapping? thank you for reading ^_^

推荐答案

冒着在没有看到应用全貌的情况下提出建议的风险，为什么不使用自定义 UIButton 而不是 UIImageViews 呢?使用 UIButton，您可以设置操作并传递发送者 ID，您可以从中轻松访问标签并从数组中提取数据.

At the risk of making a recommendation without seeing the full picture of your app, why not use a custom UIButton instead of UIImageViews for this? With a UIButton you can setup an action and pass the sender id, from which you can easily access your tags and pull the data from your array.

或者如果你真的想使用上面的代码并且你知道 - (void)findOutTheTag:(id)sender 方法正在被调用，你所要做的就是:

OR if you really want to use the above code and your know for a fact the - (void)findOutTheTag:(id)sender method is being called, all your have to do is:

- (void)findOutTheTag:(id)sender {
    switch (((UIGestureRecognizer *)sender).view.tag)      
{
    case kTag1:
    //...
    case kTag2:
    //...
  }
}

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