在scrollView上增加滑動手勢（Pan）

 

view上有一個scrollView，現在想在view上加一個Pan手勢，需求是：當向下划的時候，整個view動，但是scrollView不動；其它情況下scrollView動而view不動。

解決方法：

 

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

// 給加的手勢設置代理, 並實現此協議方法
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer {
  if ([gestureRecognizer isKindOfClass:[UIPanGestureRecognizer class]]) {
    
    UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)gestureRecognizer;
    CGPoint pos = [pan velocityInView:pan.view];
    if (pos.y > 0) {
      self.contentScrollView.scrollEnabled = NO;
      return YES;
    }
  }
  
  return NO;
}