Swift-首次加载collectionView时如何自动选择单元格? [英] Swift - how automatically select cell when collectionView first loads up?

问题描述

我试图找出如何在collectionView启动时以编程方式选择一个单元格.与之类似，collectionView的默认加载应选择第一个单元格.

I'm trying to figure out how to programmatically select a cell the moment the collectionView starts up. As in, the default load of the collectionView should have the first cell selected.

我在选择功能中使用了shouldSelectItemAtIndexPath，因此我想针对特定的单元格索引调用它.

I'm using shouldSelectItemAtIndexPath for my selection function, so I want to call it for a specific cell index.

到目前为止，我已经尝试过:

So far I have tried:

collectionView(self.collectionView!, shouldSelectItemAtIndexPath: self.collectionView!.indexPathForCell(CVcellArray.first!)!)

在我的自定义CollectionView脚本的viewDidLoad函数中.

In my viewDidLoad function for my custom CollectionView script.

在加载collectionView时崩溃.我在做错什么吗?

It crashed when the collectionView loaded. Am I doing something wrong?

谢谢.

推荐答案

在viewDidAppear中，只需调用selectItemAtIndexPath.

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