ios - How to make both header and footer in collection view with swift

Question

How to make both header and footer in collection view in swift ?

I'm trying to combine a header and a footer together but it keep crashing, I couldn't find swift tutorial to understand it.

I don't how to return supplementary view for both rather just one .

I set them both on the storyboard (class + identifier )

 override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
    //#warning Incomplete method implementation -- Return the number of sections
    return 2
}


override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    //#warning Incomplete method implementation -- Return the number of items in the section
    return 10
}




override func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
    var header: headerCell!
    var footer: footerCell!



    if kind == UICollectionElementKindSectionHeader {
        header =
            collectionView.dequeueReusableSupplementaryViewOfKind(kind,
                withReuseIdentifier: "header", forIndexPath: indexPath)
            as? headerCell

}
    return header

}

Error: UICollectionElementKindCell with identifier one - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> profileCC {
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier("one", forIndexPath: indexPath) as! profileCC

    // Configure the cell

    return cell
}



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

    switch kind {

    case UICollectionElementKindSectionHeader:

        let headerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "header", forIndexPath: indexPath) as! headerCell

        headerView.backgroundColor = UIColor.blueColor();
        return headerView

    case UICollectionElementKindSectionFooter:
        let footerView = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "footer", forIndexPath: indexPath) as! footerCell

        footerView.backgroundColor = UIColor.greenColor();
        return footerView

    default:

        assert(false, "Unexpected element kind")
    }
}

I hope someone will help.

Answer 1

You can make an UICollectionViewController to handle the UICollectionView and in Interface Builder activate the Footer and Header sections, then you can use the following method for preview in you UICollectionView the two sections added :

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

    switch kind {

    case UICollectionView.elementKindSectionHeader:

        let headerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "Header", for: indexPath)

        headerView.backgroundColor = UIColor.blue
        return headerView

    case UICollectionView.elementKindSectionFooter:
        let footerView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "Footer", for: indexPath)

        footerView.backgroundColor = UIColor.green
        return footerView

    default:

        assert(false, "Unexpected element kind")
    }

In the above code I put the identifier for the footer and header as Header and Footer for example, you can do it as you want. If you want to create a custom header or footer then you need to create a subclass of UICollectionReusableView for each and customize it as you want.

You can register your custom footer and header classes in Interface Builder or in code in the following way:

registerClass(myFooterViewClass, forSupplementaryViewOfKind: UICollectionElementKindSectionFooter, withReuseIdentifier: "myFooterView")