Swift-CATransition转场动画

系统转场

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        // 1.初始化
        let transition = CATransition()
        // 2.设置动画时长
        transition.duration = 1.0
        /*
         3.设置切换速度效果
         枚举值:
         kCAMediaTimingFunctionLinear
         kCAMediaTimingFunctionEaseIn
         kCAMediaTimingFunctionEaseOut
         kCAMediaTimingFunctionEaseInEaseOut
         kCAMediaTimingFunctionDefault
         */
        transition.timingFunction = CAMediaTimingFunction.init(name: kCAMediaTimingFunctionEaseInEaseOut)
        /*
         4.动画切换风格
         枚举值:
         kCATransitionFade = 1,     // 淡入淡出
         kCATransitionPush,         // 推进效果
         kCATransitionReveal,       // 揭开效果
         kCATransitionMoveIn,       // 慢慢进入并覆盖效果
         */
        transition.type = kCATransitionFade
        /*
         5.动画切换方向
         枚举值:
         kCATransitionFromRight//右侧
         kCATransitionFromLeft//左侧
         kCATransitionFromTop//顶部
         kCATransitionFromBottom//底部
         */
        transition.subtype = kCATransitionFromTop
        // 6.进行跳转
        navigationController?.view.layer.add(transition, forKey: nil)
        // 跳转动画一定设置为NO,不然会两个效果叠加
        navigationController?.pushViewController(TwoViewController(), animated: false) 
    }

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