Controller 实现UIGestureRecognizerDelegate协议
重写方法
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer{
return YES;
}原文：http://my.oschina.net/zhangjie9142/blog/509472