iOS - 多个Tap手势识别器

Question

在我的应用程序中，我要检测单，双和三个水龙头。所以，我正在使用UITapGestureRecognizer。我正在使用以下代码：

    UITapGestureRecognizer *oneTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTapGestureOnAnimal:)];
    oneTap.numberOfTapsRequired = 1;

    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTapGestureOnAnimal:)];
    doubleTap.numberOfTapsRequired = 2;
    [doubleTap requireGestureRecognizerToFail:oneTap];

    UITapGestureRecognizer* tripleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTripleTapGestureOnAnimal:)];
    tripleTap.numberOfTapsRequired = 3;
    [tripleTap requireGestureRecognizerToFail:doubleTap];

    [self addGestureRecognizer:oneTap];
    [self addGestureRecognizer:doubleTap];
    [self addGestureRecognizer:tripleTap];

但问题是它始终仅检测单击和双击。它根本没有检测到三重敲击....有人可以指出我正在做的检测三重敲击的错误吗？

Answer 1

检查，

[oneTap requireGestureRecognizerToFail:doubleTap];
[oneTap requireGestureRecognizerToFail:tripleTap];
[doubleTap requireGestureRecognizerToFail:tripleTap];

您已经切换了方法中的水龙头，而您没有在上面的第二行。理想情况下，只有在双击和三击失败时才能检测到一个敲击。当三次敲击失败时，应检测到双击。

Answer 2

将您的2个requireGestureRecognizerToFail调用更改为：

[oneTap requireGestureRecognizerToFail:tripleTap];
[oneTap requireGestureRecognizerToFail:doubleTap];
[doubleTap requireGestureRecognizerToFail:tripleTap];