Could not cast value of type 'UICollectionViewCell'

Question

I use a custom CollectionViewCell in my Storyboard. When I start the app I get this message:

Could not cast value of type \'UICollectionViewCell\' to T

Answer 1

The template for a CollectionViewController in Xcode comes with this line of code in viewDidLoad, which changes the specification in your storyboard.

// Register cell classes
self.collectionView!.register(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)

Simply delete that line.

In older Swift versions the line is:

// Register cell classes
self.collectionView!.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)