将垂直滚动手势传递到下面的UITableView [英] Passing vertical scrolling gesture to UITableView below

问题描述

（为清晰起见编辑）

我有一个UITableView。最重要的是附有Pan手势的UIView。此Pan向左和向右滑动以更改基础表。我使用平移手势的动作方法来移动表格。工作正常。

I have a UITableView. On top of that is a UIView with a Pan gesture attached. This Pan swipes left and right to change the underlying table. I use the pan gesture's action method to move the table. That working fine.

然而，UIView&它的Pan手势会干扰向上/向下滚动UITableView。如何将向上/向下滚动发送到桌面并在视图区域保持左右？

However, the UIView & its Pan gesture interferes with up/down scrolling the UITableView. How can I send the up/down scrolling to the table and keep the left-right on the view's area?

 ---------------------------------------
 |                                     |
 |             ----------------------  |
 |             |                    |  |
 |             |                    |  |
 |             |                    |  |
 | UITableView |                    |  |
 |             |        UIView      |  |
 |             |          +         |  |
 |             |       PanGesture   |  |
 |             |                    |  |
 |             |                    |  |
 |             |                    |  |
 |             |                    |  |
 |             ----------------------  |
 |                                     |
 |                                     |
 ---------------------------------------

Pan手势触发的方法就像这样

The method triggered by the Pan gesture is like this

 -(void)move:(UIPanGestureRecognizer*)sender
 {
     CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:self.view];
     float xTest = fabsf(translatedPoint.x);
     float yTest = fabsf(translatedPoint.y);
     if ( xTest>yTest)
     {
         // Move table view left-right.. this works
     } else
     {
         // Send up-down scrolling gesture to table view????? How to?
     }
 }

推荐答案

我刚刚解决了类似的问题，除了它是垂直平底锅而不是水平平底锅。我对你的用例并不是100％肯定，所以这可能不是你想要的，但它可能会引导你朝着正确的方向发展。

I just solved a similar problem, except it was for vertical pans instead of horizontal ones. I'm not 100% sure about your use case, so this may not be what your looking for, but it may lead you in the right direction.

我分归类为UIPanGestureRecognizer，并实现了touchesMoved方法，并检查手势是否有更大的水平或垂直变化。以下是一个片段。该信用属于不同的stackoverflow帖子，但我目前找不到该链接。 （抱歉格式不佳，第一次发帖）

I sub-classed UIPanGestureRecognizer, and implemented the touchesMoved method, and checked to see whether the gesture had a larger horizontal or vertical change. Below is a snippet. The credit belongs to a different stackoverflow post, but I cannot find the link at the moment. (Sorry in advance for the poor formatting, first time posting)

-(void)touchesMoved:(NSSet*) touches withEvent:(UIEvent *)event
{
[super touchesMoved:touches withEvent:event];
if(self.state == UIGestureRecognizerStateFailed) return;
CGPoint currentPoint = [[touches anyObject] locationInView:self.view];
CGPoint prevPoint = [[touches anyObject] previousLocationInView:self.view];
moveX += prevPoint.x - currentPoint.x;
moveY += prevPoint.y - currentPoint.y;
if(!drag) {
    if(abs(moveY) > abs(moveX))
        drag = YES;
    else
        self.state = UIGestureRecognizerStateFailed;
}
}

-(void)reset
{
[super reset];
drag = NO;
moveX = 0;
moveY = 0;
}

在我的父视图控制器中，我相信在这种情况下是UITableView ，我也实现了以下内容。我认为在你的情况下，你想要返回no，如果它是一个水平平底锅。

In my parent view controller, which I believe would be the UITableView in this case, I also implemented the following. I think in your case, you'd want to return no if it's a horizontal pan.

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
if([gestureRecognizer isKindOfClass:[VerticalPanGestureRecognizer class]])
{
    return YES;
}
return NO;
}

如果有任何不清楚的地方，请告诉我。

Let me know if any of this is unclear.

祝你好运！

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