[Medium Gists] Complex Transaction

ComplexTransaction.swift

let oldValue = styledButton.frame.width/2
let newButtonWidth: CGFloat = 60

/* Do Animations */
CATransaction.begin()
CATransaction.setAnimationDuration(2.0)
CATransaction.setAnimationTimingFunction(CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut))

// View animations
UIView.animate(withDuration: 2.0) {
    self.styledButton.frame = CGRect(x: 0, y: 0, width: newButtonWidth, height: newButtonWidth)
    self.styledButton.center = self.view.center
}

// Layer animations
let cornerAnimation = CABasicAnimation(keyPath: #keyPath(CALayer.cornerRadius))
cornerAnimation.fromValue = oldValue
cornerAnimation.toValue = newButtonWidth/2

styledButton.layer.cornerRadius = newButtonWidth/2
styledButton.layer.add(cornerAnimation, forKey: #keyPath(CALayer.cornerRadius))

CATransaction.commit()