CollectionView dynamic height with Swift 3 in iOS

Question

Recently, I\'m trying to do some projects for practicing. So I watched the course \"Developing Apps for iOS\", Stanford University, CS193P, 2017.

And now, I\'m doing

Answer 1

Provide estimatedSize to your UICollectionViewLayout.

The estimated size should be the size shown in the size inspector of your xib.

collectionViewLayout.estimatedItemSize = CGSize(width: collectionView.frame.width, height: 50)

Override the method preferredLayoutAttributesFitting(_:) in your UICollectionViewCell

override func preferredLayoutAttributesFitting(_ layoutAttributes: UICollectionViewLayoutAttributes) -> UICollectionViewLayoutAttributes {
    setNeedsLayout()
    layoutIfNeeded()
        
    let size = contentView.systemLayoutSizeFitting(layoutAttributes.size)
        
    var frame = layoutAttributes.frame
    frame.size.height = ceil(size.height)
        
    layoutAttributes.frame = frame
        
    return layoutAttributes
}

Your collection view cell will now have dynamic size as per the content.