需要實現代理類UIGestureRecognizerDelegate
然后指定手勢對象的代理類
pinchGes.delegate=self;
rotGes.delegate=self;
然后實現函數
//是否可以同時響應兩個手勢如果是yes就可以
-(BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer{
returnYES;
}