ios - 平移和 2 指同时捏合 iOS - 同时 -

Question

2 手势识别器：

UIPinchGestureRecognizer *twoFingerPinch = 
[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinch:)];
[croppper addGestureRecognizer:twoFingerPinch];

UIPanGestureRecognizer *PanRecognizer = [[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)] autorelease];
[croppper addGestureRecognizer:PanRecognizer];

和：

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

但是同时捏和平移不起作用...通常我可以捏，因为平移识别器已打开。

问候

Answer 1

您似乎没有为每个手势识别器设置委托。gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:是一个委托方法，因此如果手势识别器没有委托，则不会调用此方法。

因此，默认返回值为NO，因此不会同时识别手势。

Answer 2

您是否将自己设置为识别器代表？

[twoFingerPinch setDelgate:self];
...
[PanRecognizer setDelegate:self];

PS我也会尝试为您的变量获得更一致的命名方案！