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我有一个容器视图，上面有两个 UILongPressGestureRecognizers（不仅是这两个，而且其他手势都可以）。一个是识别一个手指，另一个是两个。当我尝试为一根手指触发手势时，它不会触发它的目标方法，直到手指抬起。两个手指的第二个手指按预期工作，在短时间内触发选择器动作。当我禁用两指按下的手势时，一指按下恢复正常。手势是如何初始化的，首先是一个手指手势，在vc setup里面初始化。

 - (void) setupGestures
{
    [self.contentView addGestureRecognizer:self.longGestureRecognizer];
}

- (UILongPressGestureRecognizer *)longGestureRecognizer
{
    if (!_longGestureRecognizer) {
        _longGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
        [_longGestureRecognizer setMinimumPressDuration:1];
    }
    return _longGestureRecognizer;
}

第二个是稍后初始化的，但不是来自主机 VC，而是添加到它的内部视图

//Called in host
rullerView = [[RullerView alloc] initWithContent:self.contentView viewController:self];

并在初始视图中：

//This is called from within previous call initWithContent:ciewController:
- (void)setupGestures
{
    UILongPressGestureRecognizer *rullerGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(rullerTapAction:)];
    [rullerGestureRecognizer setNumberOfTouchesRequired:2];

    //view here is a content view passed into init, basically the same one
    //to which first recognizer is added, however selector action is contained 
    //in this view, and this view is target for this recognizer
    [view addGestureRecognizer:rullerGestureRecognizer];
}

这会不会是个问题？？已经试过了

[gesture requireGestureRecognizerToFail:otherGesture];

以及添加识别器的视图的委托方法：

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