ios - 禁用 UIScrollView 拖动事件到特定方向并将事件发送到 super

Question

我有 UIView 并附加了一个 UIPanGestureRecognizer。在 UIView 中，我有启用了分页的 UIScrollView，我设置了内容大小，这样 scrollView 就可以 滚动到左边。

问题:

我希望当用户尝试将 scrollView 拖动到右侧时，将事件向上发送到 UIView，以便“UIPanGestureRecognizer”可以处理触摸事件

Answer 1

终于，在 6 小时后我弄明白了我继承了 UIScrollView 并实现了 gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer 委托(delegate)方法

当用户在 scrollView 上拖动时，此方法被调用 (BOOL)gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer 并且默认返回 NO

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    if (self.contentOffset.x > 0 &&  self.contentOffset.x <= self.contentSize.width - self.frame.size.width) {
        //user is in middle of dragging the scrollView don't allow any other gestureRecognizer to respond
        return NO;
    }else{
        //scrollView contentOffset is 0 and user is not dragging the scrollView so let other gestureRecognizer to respond
        return YES;
    }
}