I have custom NSView which should be rotated around center using CoreAnimation (or any other way available in osx sdk). I tried a lot of solutions, but nsview being rotated around bottom left point instead center and seems always ignoring anchor point. what I'm doing wrong?
override func awakeFromNib() {
super.awakeFromNib()
spinnerView = NSView(frame: self.bounds)
spinnerView.layer = CALayer()
spinnerView.wantsLayer = true
addSubview(spinnerView)
spinnerView.layer!.backgroundColor = NSColor.redColor().CGColor
spinnerView.layer!.position = CGPointMake(CGRectGetMidX(spinnerView.frame), CGRectGetMidY(spinnerView.frame) )
spinnerView.layer!.anchorPoint = CGPointMake(0.5, 0.5)
startAnimation()
}
func startAnimation() {
let rotation = CABasicAnimation(keyPath: "transform")
rotation.duration = 10.0
rotation.toValue = 20 * M_PI
rotation.repeatCount = Float.infinity
rotation.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionLinear)
rotation.valueFunction = CAValueFunction(name: kCAValueFunctionRotateZ)
spinnerView.layer!.addAnimation(rotation, forKey: "transform.rotation.z")
}