如何快速滚动到集合视图中的特定索引 [英] How to scroll to a particluar index in collection view in swift

问题描述

我们有一个集合视图.我制作了一个水平显示日期的日历&我水平滚动日期.现在在屏幕上我只看到 3-4 个日期.现在我想在显示日历屏幕时自动滚动到特定的选定日期.所以我想滚动到的日期尚不可见.

We have a collection view. I have made a calendar which shows dates horizontally & I scroll dates horizontally. Now on screen I see only 3-4 dates. Now I want to auto scroll to a particular selected date when calendar screen I shown.So the date I want to scroll to is not visible yet.

为此，我获得了特定单元格的索引路径.现在我试图将它滚动到特定的索引路径.

For that I got the indexpath for particular cell. Now I am trying to scroll it to particular indexpath.

  func scrollCollectionView(indexpath:IndexPath)
  {
   // collectionView.scrollToItem(at: indexpath, at: .left, animated: true)
    //collectionView.selectItem(at: indexpath, animated: true, scrollPosition: .left)
    collectionView.scrollToItem(at: indexpath, at: .centeredHorizontally, animated: true)
    _ = collectionView.dequeueReusableCell(withReuseIdentifier: "DayCell", for: indexpath) as? DayCell

  }

请告诉我如何实现它?

推荐答案

在你的控制器的viewDidLoad中，你可以编写滚动到集合视图特定索引路径的代码.

In viewDidLoad of your controller, you can write the code for scrolling to a particular index path of collection view.

self.collectionView.scrollToItem(at:IndexPath(item: indexNumber, section: sectionNumber), at: .right, animated: false)

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