Programmatically create UICollectionView with custom headers

Question

I\'m making an iOS app in swift, and I\'m trying to make a collectionView programmatically. I want to use my own subclass of UICollectionReusableView as a header for the Col

Answer 1

you can do it like this:

// Setup Header
self.collectionView?.registerClass(CollectionCustomHeader.self, forSupplementaryViewOfKind: CustomeHeaderHeader, withReuseIdentifier: "customHeader")

also:

override func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {

if kind == CustomeHeaderHeader {
    let view = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "parallaxHeader", forIndexPath: indexPath)
    return view
}

Answer 2

So I figured it out, with inspiration from Mohamad Farhand.

The problem was that I had to register the subclass itself with the collectionView, instead of UICollectionReusableView.self, I used the instance of the subclass someView.. So this solved my problem:

collectionView.registerClass(SupView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader , withReuseIdentifier: "someRandonIdentifierString")

And how to initialize the view:

someView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "someRandonIdentifierString", forIndexPath: indexPath) as! SupView

Answer 3

Here is a Swift 3 & 4 answer I've used in a project

self.collectionView.register(LibraryHeaderNib.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader , withReuseIdentifier: "LibraryHeaderNib")

and inside viewForSupplementaryElementOfKind

let reusableView = self.collectionView!.dequeueReusableSupplementaryView(ofKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "LibraryHeaderNib", for: indexPath) as! LibraryHeaderNib

return reusableView

Answer 4

Note that Swift 4.1 renames the ofKind: constant as UICollectionView.elementKindSectionHeader.