ios - 在 UIScrollView 中允许单击手势识别器和双击

Question

所以我在 UIScrollView 中有一个 UIImageView，我需要捕获两者:- 单击手势- 双击手势对于 UIImageView

双击手势应该作为缩放 Action 发送到 UIScrollView单击手势由我自己创建的 UITapGestureRecognizer 捕获。双击手势比单击具有更高的优先级(当有双击时，放大 ScrollView ，否则执行单击)

到目前为止，如果我将单击手势识别器添加到 ScrollView ，单击会立即被识别，而不会识别双击。

如果我将单击手势识别器添加到 imageview，它永远不会收到任何 Action ，但双击可以工作

感谢任何建议，谢谢..

Answer 1

试试这段代码，

目标 - C

 UITapGestureRecognizer *singletap = [[UITapGestureRecognizer alloc]
                                                     initWithTarget:self
                                                     action:@selector(singleTap:)];
    singletap.numberOfTapsRequired = 1;
    singletap.numberOfTouchesRequired = 1;

[scrollView addGestureRecognizer:singletap];


UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc]
                                                 initWithTarget:self
                                                 action:@selector(doubleTap:)];
doubleTap.numberOfTapsRequired =2 ;
doubleTap.numberOfTouchesRequired = 1;

[scrollView addGestureRecognizer:doubleTap];



[singleTap requireGestureRecognizerToFail:doubleTap];

swift 3.0

var singletap = UITapGestureRecognizer(target: self, action: #selector(self.singleTap))
singletap.numberOfTapsRequired = 1
singletap.numberOfTouchesRequired = 1
scrollView.addGestureRecognizer(singletap)
var doubleTap = UITapGestureRecognizer(target: self, action: #selector(self.doubleTap))
doubleTap.numberOfTapsRequired = 2
doubleTap.numberOfTouchesRequired = 1
scrollView.addGestureRecognizer(doubleTap)
singleTap.require(toFail: doubleTap)