如何使UIPanGestureRecognizer的UILongPressGestureRecognizer失败？

Question

在我看来，我添加了长按手势和平移手势，如下所示

UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(fitToView:)];
    [longPressRecognizer setDelegate:self];
    longPressRecognizer.allowableMovement = 5.0f;
    longPressRecognizer.minimumPressDuration = 2.0;
    [self addGestureRecognizer:longPressRecognizer];

    UIPanGestureRecognizer *panRecognizer = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(move:)];
    [panRecognizer setMinimumNumberOfTouches:1];
    [panRecognizer setMaximumNumberOfTouches:1];
    panRecognizer.delegate = self;
    [self addGestureRecognizer:panRecognizer];
    [panRecognizer requireGestureRecognizerToFail:longPressRecognizer];

其手势处理程序如下：

-(void)move:(UIPanGestureRecognizer*)recognizer {

    CGPoint translatedPoint = [recognizer translationInView:self.imgView ];

    if ([recognizer state] == UIGestureRecognizerStateBegan) {
        _firstX = [self.imgView center].x;
        _firstY = [self.imgView center].y;
    } 

    CGAffineTransform newTransform = CGAffineTransformTranslate(CGAffineTransformIdentity, translatedPoint.x , translatedPoint.y );

    self.imgView.transform = newTransform;

}

-(void)fitToView:(UILongPressGestureRecognizer*)recognizer {

    if ([recognizer state] == UIGestureRecognizerStateBegan) {
        self.imgView.transform = CGAffineTransformIdentity;
    }

}

长按旨在恢复图像。 但是当我移动图像时，长按手势代表也会调用并恢复我所做的所有更改。 我用了[panRecognizer requireGestureRecognizerToFail:longPressRecognizer]; 使长按识别器失败。 但这并没有发生。 我还尝试了委托方法gestureRecognizer：应该同时使用GestureRecognizer：来识别 。 但这没用

Answer 1

尝试实现委托功能

gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:

然后返回是

Answer 2

您是否看到了这个相关答案， 将UILongPressGestureRecognizer与来自@annie 的UIPanGestureRecognizer组合在一起 ？

您只能使用UILongPressGestureRecognizer进行此UILongPressGestureRecognizer 。