Swift - 在collectionView首次加载时如何自动选择单元格？

Question

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.

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

So far I have tried:

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

In my viewDidLoad function for my custom CollectionView script.

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

Thank you.

Answer 1

在viewDidAppear只需调用selectItemAtIndexPath 。