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  • ISO给UIImageView增加点击事件

    自己做了一个九宫格,里面的图标都是由多张图片重叠构成,然后包装成一个button来使用;

    遇到的问题是如何给这个“button”增加点击事件?

    解决思路1:网友提示在该“button”上增加一个真正的透明button,这样就可以顺利执行点击事件了;但是本人尝试发现,如果我调整了button的透明度后,点击是没有效果的!可能是我操作错误,待再次验证。

    解决思路2:为UIImageView增加手势

    [ImageView addGestureRecognizer:我们自己的手势recognizer];

    如何创建一个手势?看看UITapGestureRecognizer 的用法吧。

     //单指单击
    
     UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
     action:@selector(handleSingleFingerEvent:)];
     singleFingerOne.numberOfTouchesRequired = 1; //手指数
     singleFingerOne.numberOfTapsRequired = 1; //tap次数
     singleFingerOne.delegate= self;
     
     //单指双击
     UITapGestureRecognizer *singleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
     action:@selector(handleSingleFingerEvent:)];
     singleFingerTwo.numberOfTouchesRequired = 1;
     singleFingerTwo.numberOfTapsRequired = 2;
     singleFingerTwo.delegate= self;
     
     //双指单击
     UITapGestureRecognizer *doubleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self
     action:@selector(handleDoubleFingerEvent:)];
     doubleFingerOne.numberOfTouchesRequired = 2;
     doubleFingerOne.numberOfTapsRequired = 1;
     doubleFingerOne.delegate= self;
     
     UITapGestureRecognizer *doubleFingerTwo = [[UITapGestureRecognizer alloc] initWithTarget:self
     action:@selector(handleDoubleFingerEvent:)];
     doubleFingerTwo.numberOfTouchesRequired = 2;
     doubleFingerTwo.numberOfTapsRequired = 2;
     doubleFingerTwo.delegate= self;
     
     //如果不加下面的话,当单指双击时,会先调用单指单击中的处理,再调用单指双击中的处理
     [singleFingerOne requireGestureRecognizerToFail:singleFingerTwo];
     //同理双指亦是如此
     [doubleFingerOne requireGestureRecognizerToFail:doubleFingerTwo];
     
     [self.view addGestureRecognizer:singleFingerOne];
     [self.view addGestureRecognizer:singleFingerTwo];
     [self.view addGestureRecognizer:doubleFingerOne];
     [self.view addGestureRecognizer:doubleFingerTwo];
     
     [singleFingerOne release];
     [singleFingerTwo release];
     [doubleFingerOne release];
     [doubleFingerTwo release];
    处理事件的方法,代码:
     //处理单指事件
    - (void)handleSingleFingerEvent:(UITapGestureRecognizer *)sender
    {
    if(sender.numberOfTapsRequired == 1) {
    //单指单击
    NSLog(@"单指单击");
     }elseif(sender.numberOfTapsRequired == 2){
    //单指双击
    NSLog(@"单指双击");
    }
     }
     //处理双指事件
     - (void)handleDoubleFingerEvent:(UITapGestureRecognizer *)sender
     {
     if(sender.numberOfTapsRequired == 1) {
     //双指单击
     NSLog(@"双指单击");
     }elseif(sender.numberOfTapsRequired == 2){
     //双指双击
     NSLog(@"双指双击");
     }
     }
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  • 原文地址:https://www.cnblogs.com/bmate/p/3302759.html
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