在 Objective-C 中实现 singleTap 和 doubleTap

Posted 2023-02-27

【中文标题】在 Objective-C 中实现 singleTap 和 doubleTap

【英文标题】：Implement singleTap and doubleTap in Objective-C

【发布时间】：2013-03-22 01:48:45

【问题描述】：

我将 singTap 和 doubleTap 添加到如下代码所示的视图中：

-(void)awakeFromNib
    [self setUserInteractionEnabled:YES];
    //
    UITapGestureRecognizer *doubleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTapGesture:)];
    doubleTapGesture.numberOfTapsRequired = 2;
    [self addGestureRecognizer:doubleTapGesture];

    UITapGestureRecognizer *singleTapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTapGesture:)];
    singleTapGesture.numberOfTapsRequired = 1;
    [self addGestureRecognizer:singleTapGesture];


-(void)handleSingleTapGesture:(UITapGestureRecognizer *)singleTapGesture
    [[self delegate] singleTapOnView];


-(void)handleDoubleTapGesture:(UITapGestureRecognizer *)doubleTapGesture
    [[self delegate] doubleTapOnView];

当 doubleTap 时，singleTap 也会触发。 doubleTap时如何禁用singleTap？谢谢！

【参考方案1】：

告诉单击识别器它需要双击识别器在触发之前失败：

[singleTapGesture requireGestureRecognizerToFail:doubleTapGesture];

（这实际上是UIGestureRecognizer docs for this method中的规范示例。）