How to add loading Indicator in Footer of CollectionView in iOS

Question

How can I add loading Indicator in the Footer of collection view when data is loaded for next page..?

I want to loading indicator in Footer of Collection vi

Answer 1

The simplest solution would be adding the activity indicator to a view and add that view to UICollectionReusableView.

In collection view : 

 private let footerView = UIActivityIndicatorView(style: UIActivityIndicatorView.Style.white)


  override func viewDidLoad() {
        super.viewDidLoad()

        collectionView.register(CollectionViewFooterView.self, forSupplementaryViewOfKind: UICollectionView.elementKindSectionFooter, withReuseIdentifier: "Footer")
        (collectionView.collectionViewLayout as? UICollectionViewFlowLayout)?.footerReferenceSize = CGSize(width: collectionView.bounds.width, height: 50)

    }

   override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
        if kind == UICollectionView.elementKindSectionFooter {
            let footer = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: "Footer", for: indexPath)
            footer.addSubview(footerView)
            footerView.frame = CGRect(x: 0, y: 0, width: collectionView.bounds.width, height: 50)
            return footer
        }
        return UICollectionReusableView()
    }

customized class: add your customizations here if you need any

public class CollectionViewFooterView: UICollectionReusableView {
    override init(frame: CGRect) {
        super.init(frame: frame)
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

just use: footerView.startAnimating() & footerView.stopAnimating() for start or stop the animation 

***** Hope you like it .******