How to animate the frame of an layer with CABasicAnimation?

Question

I guess I have to convert the CGRect into an object to pass it to fromValue?

This is how I try it, but it doesn\'t work:

CABasicAnimation *frameAnima         


        

Answer 1

The question is antique, but I will answer it anyway.

Frame property is not animatable. You have to animate other properties. Also you have to disable implicit animations.

    let updatedBounds = ...
    let animation = CABasicAnimation(keyPath: "bounds")
    animation.duration = 0.5
    //it's better to start animation from presentation layer in case there is already animation going on
    animation.fromValue = customLayer.presentation()?.bounds
    animation.toValue = updatedBounds
    customLayer.add(animation, forKey: nil)

    //disable implicit animation for thoose properties
    CATransaction.begin()
    CATransaction.setDisableActions(true)
    //update properties so they will be updated at the end of animation
    customLayer.bounds = updatedBounds
    customLayer.position = originalRect.origin
    customLayer.anchorPoint = CGPoint(x: 0, y: 0)
    CATransaction.commit()