ios开发-单击和双击手势的区分处理

// 单击的 Recognizer

    UITapGestureRecognizer* singleRecognizer;

    singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(signalTap)];

    singleRecognizer.delegate=self;

    singleRecognizer.numberOfTapsRequired = 1; // 单击

    [scroller addGestureRecognizer:singleRecognizer];

    

    // 双击的 Recognizer

    UITapGestureRecognizer* doubleRecognizer;

    doubleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dubleTap)];

    doubleRecognizer.delegate=self;

    doubleRecognizer.numberOfTapsRequired = 2; // 双击

    [scroller addGestureRecognizer:doubleRecognizer];

    

    // 关键在这一行，如果双击确定偵測失败才會触发单击

    [singleRecognizer requireGestureRecognizerToFail:doubleRecognizer];

    [singleRecognizer release];

    [doubleRecognizer release];