最近在tableview里的cell imageview加了个 uipangesturerecognizer发现优先滚动imageview，往上拖的时候，tableView不响应滚动了，原来是tableview的实现也是用了uipangesturerecognizer。解决方案如下：
实现 UIGestureRecognizerDelegate
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES;//uitableview和子view也响应 no只响应子view uipangesturerecognizer
}