有时我们添加的UIGestureRecognizer识别不出来，分析原因至少有以下三种可能：-(BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizershouldRecognizeSimultaneouslyWithGestureRecognizer...

UIGestureRecognizer1.是什么?专门用来处理手势识别的类.2.有什么用?这是一个抽象类.通过其具体子类可以处理手势识别,具体子类.UITapGestureRecognizer//轻拍UIPinchGestureRecognizer//缩放UIRotationGestureRecognizer//旋转U...