How do you move a CALayer instantly (without animation)

Question

I\'m trying to drag a CALayer in an iOS app.

As soon as I change its position property it tries to animate to the new position and flickers all over the

Answer 1

Combining previous answers here for Swift 4, to clearly make the animation duration explicit...

extension CALayer
{
    class func perform(withDuration duration: Double, actions: () -> Void) {
        CATransaction.begin()
        CATransaction.setAnimationDuration(duration)
        actions()
        CATransaction.commit()
    }
}

Usage...

CALayer.perform(withDuration: 0.0) {
            aLayer.frame = aFrame
        }