iOS-scrollViewDidEndDecelerating同时为scrollView和collectionView运行 [英] iOS - scrollViewDidEndDecelerating runs for both scrollView and collectionView

问题描述

我有一个VC，其中包含一个 collectionView 和一个 scrollView .我通过滚动scrollView将此代码更改为 pageController 的当前页面:

  func scrollViewDidEndDecelerating(_ scrollView:UIScrollView){让pageNumber = round(scrollView.contentOffset.x/scrollView.frame.size.width)self.pageController.currentPage = Int(页面编号)} 

它对于 scrollView 来说很好用，但问题是当我甚至滚动 collectionView 时，它都会声明并导致 pageController 中发生不必要的更改！

我该怎么办?

解决方案

除了上面发布的答案外，您还可以使用视图的tag属性.

只需通过xib或通过代码为滚动视图分配一个标记(Int).

  yourScrollView.tag = 10 

然后在scrollview委托方法中检查此标记:

  func scrollViewDidEndDecelerating(_ scrollView:UIScrollView){如果scrollView.tag == 10 {///您的滚动视图已滚动} 别的 {//集合视图已滚动}} 

I have a VC that contains a collectionView and a scrollView. I put this code to change current page of pageController by scrolling in scrollView :

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {

    let pageNumber = round(scrollView.contentOffset.x / scrollView.frame.size.width)
    self.pageController.currentPage = Int(pageNumber)
}

It works nice for scrollView but the problem is when i even scroll in collectionView it declares and causes unwanted changing in pageController!

What should i do?

解决方案

In addition to the answers posted above, You can make use of the tag property of the view.

Just assign a tag (Int) to your scrollview either in xib or via code.

yourScrollView.tag = 10

And in the scrollview delegate method check for this tag:

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {

    if scrollView.tag == 10 { 
      ///Your scrollview was scrolled
    } else {
      // Collection view was scrolled
    }

}

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