Combine animations

.swift

CATransaction.begin()  //Start of animation transaction

CATransaction.setCompletionBlock { //Transaction is Ready
   print("READY")
}

heightConstraint.constant = 80.0

UIView.animate(withDuration: 2.0) { // UIView type of animation
   view.layoutIfNeeded()
}

let cornerAnimation = CABasicAnimation(keyPath: #keyPath(CALayer.cornerRadius)) // CALayer type of animation
cornerAnimation.fromValue = 0
cornerAnimation.toValue = 12
view.layer.add(cornerAnimation, forKey: #keyPath(CALayer.cornerRadius))

CATransaction.commit() //End of animation transaction