CGAffineTransform animation in cell not working - ios

Question

I'm having an issue with animating an UIImageView inside an CollectionViewCell. I've set the views with Auto Layout, not sure if that could cause a problem.
If tried calling in didEndDisplaying but with no results.
What is the proper lifecycle function to call an cell animation?
Code:
import UIKit
class ProfileCell: UICollectionViewCell {
....
let backgroundImageView: UIImageView = {
let iv = UIImageView(frame: .zero)
iv.contentMode = .scaleAspectFill
iv.image = UIImage(named: "lustrum2017")
iv.clipsToBounds = true
return iv
}()
var blurView: UIVisualEffectView = {
let be = UIBlurEffect(style: .light)
let vv = UIVisualEffectView(effect: be)
return vv
}()
let profileImageView: UIImageView = {
let iv = UIImageView()
iv.image = UIImage(named: "dummy")
iv.contentMode = .scaleAspectFill
iv.layer.cornerRadius = 40
iv.layer.masksToBounds = true
iv.layer.borderColor = Colors.primaryColor.cgColor
iv.layer.borderWidth = 1.0
iv.transform = CGAffineTransform(scaleX: 0.001, y: 0.001)
return iv
}()
override init(frame: CGRect) {
super.init(frame: frame)
setupViews()
animateViews()
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
private func animateViews() {
self.profileImageView.transform = CGAffineTransform(scaleX: 1, y: 1)
UIView.animate(withDuration: 0.45, animations: {
self.layoutIfNeeded()
}, completion: nil)
}
private func setupViews() {
contentView.addSubview(backgroundImageView)
contentView.addSubview(blurView)
contentView.addConstraintsWithFormat("H:|[v0]|", views: backgroundImageView)
contentView.addConstraintsWithFormat("V:|[v0(150)]", views: backgroundImageView)
contentView.addConstraintsWithFormat("H:|[v0]|", views: blurView)
contentView.addConstraintsWithFormat("V:|[v0(150)]", views: blurView)
blurView.addSubview(profileImageView)
blurView.addConstraintsWithFormat("H:|-\(frame.width / 2 - 40)-[v0(80)]-\(frame.width / 2 - 40)-|", views: profileImageView)
blurView.addConstraintsWithFormat("V:|[v0(80)]", views: profileImageView)
}
....
}

Answer 1

You might try doing the transformation inside of the UIView.animate block and it should work. As follows:
private func animateViews() {
self.profileImageView.transform = CGAffineTransform.identity
UIView.animate(withDuration: 0.45, animations: {
self.profileImageView.transform = CGAffineTransform(scaleX: 1, y: 1)
self.layoutIfNeeded()
}, completion: nil)
}
Also, if you created the cell from the storyboard/xib instead of manually registering the cell via code, awakeFromNib might get you the result you want.
Edit: The above answer is assuming that you want the animation to occur once the cell is first created, as it seems more similar to the code you have. If you want to have it be called every time the cell appears on screen then you need to use the UICollectionViewDelegate's collectionView(_:willDisplay:forItemAt:)