requireGestureRecognizerToFail 不起作用

Posted 2023-02-27

【中文标题】requireGestureRecognizerToFail 不起作用

【英文标题】：requireGestureRecognizerToFail do not work

【发布时间】：2012-06-18 15:41:57

【问题描述】：

我正在使用两种不同的 TapGestureRecognizer 来处理屏幕上的单击和双击。 这是代码：

UITapGestureRecognizer *tapGR =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
    [tapGR setDelegate:self];
    [tapGR setNumberOfTapsRequired:1];
    [self addGestureRecognizer:tapGR];


    UITapGestureRecognizer *doubleTapGR = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleDoubleTap:)];
    [doubleTapGR setNumberOfTouchesRequired:2];
    [self addGestureRecognizer:doubleTapGR];

    [tapGR requireGestureRecognizerToFail : doubleTapGR];

    [tapGR release];
    [doubleTapGR release];

即使我指定了 [tapGR requireGestureRecognizerToFail: doubleTapGR]，也会执行“handleTap”选择器。哪里错了？

【参考方案1】：

你错了！您对doubleTapGR 使用了setNumberOfTouchesRequired 方法，而不是使用setNumberOfTapsRequired。这是更正后的代码：

UITapGestureRecognizer *tapGR =[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleTap:)];
[tapGR setDelegate:self];
[tapGR setNumberOfTapsRequired:1];
[self addGestureRecognizer:tapGR];


UITapGestureRecognizer *doubleTapGR = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleDoubleTap:)];
[doubleTapGR setNumberOfTapsRequired:2];
[self addGestureRecognizer:doubleTapGR];

[tapGR requireGestureRecognizerToFail : doubleTapGR];

[tapGR release];
[doubleTapGR release];

最好的问候 ;)

【讨论】：

如果我在单击时有轻微的延迟，是不是我做错了什么？

【参考方案2】：

我想你可能遗漏了：

[doubleTapGR setDelegate:self];

【讨论】：

我自己回答了我的问题，对不起，我真的很笨:(

【参考方案3】：

我发现我真的很笨:)

我写道：

[doubleTapGR setNumberOfTouchesRequired:2];

代替：

[doubleTapGR setNumberOfTapsRequired:2];

请随意删除此答案。抱歉 ***。