同时使用触摸和触摸手势识别器

Question

我正在使用两个手势识别器UIView.一个是标准的UITapGestureRecognizer,另一个是非常简单的触摸识别器我写道:

@implementation TouchDownGestureRecognizer

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if (self.state == UIGestureRecognizerStatePossible) {
        self.state = UIGestureRecognizerStateRecognized;
    }
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    self.state = UIGestureRecognizerStateFailed;
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    self.state = UIGestureRecognizerStateFailed;
}

@end

只有在我们为包含此方法的两个委托分配委托时,它们才能一起工作:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

这一切都很好,但是当我对该视图执行长按时,触摸识别器触发并触摸识别器不会.对于短的水龙头一切都很好,他们都开火了.

我实现了所有方法UIGestureRecognizerDelegate以返回YES无效.如果我正在添加日志以查看与委托的交互以及在我自己的识别器中,我可以看到,对于短按和长按,调用顺序是相同的 - 除了调用修饰识别器.我做错了什么？

Answer 1

你为什么不直接检查touchUp UILongPressGestureRecognizer？

-(void)selectionDetected:(UILongPressGestureRecognizer*)longPress
{
    if(longPress.state==1)
    {
       //long Press is being held down
    }
    else if(longPress.state==3)
    {
        //the touch has been picked up
    }
}