mac CATransition 动画

macOS的CATransition 动画和iOS中的CATransition动画的用法也是差不多的。比如一个跳转的转场动画是这样的

    let qrCodeVC = QRCodeVC.init(nibName:"QRCodeVC", bundle:nil)
    let transition = CATransition.init()
    transition.isRemovedOnCompletion = true
    transition.type = .push
    transition.subtype = .fromLeft
    transition.repeatCount = 1
    transition.startProgress = 0.0
    transition.endProgress = 1.0
    transition.duration = 10.0
    qrCodeVC.view.layer?.add(transition, forKey: nil)
    self.presentAsModalWindow(qrCodeVC)

这样一个动画就完成了。