如何在iOS中从左到右呈现视图控制器？

Question

将新控制器添加到导航堆栈时:

self.navigationController!.pushViewController(PushedViewController(), animated: true)

从右边看:

如何更改动画的方向以使其从左侧显示？

Answer 1

Swift 5.1：来自不同方向的Segue

这是针对不同segue方向的简单扩展。（在Swift 5中测试）

看来您想使用segueFromLeft（）我也添加了一些其他示例。

extension CATransition {

//New viewController will appear from bottom of screen.
func segueFromBottom() -> CATransition {
    self.duration = 0.375 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromTop
    return self
}
//New viewController will appear from top of screen.
func segueFromTop() -> CATransition {
    self.duration = 0.375 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromBottom
    return self
}
 //New viewController will appear from left side of screen.
func segueFromLeft() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.moveIn
    self.subtype = CATransitionSubtype.fromLeft
    return self
}
//New viewController will pop from right side of screen.
func popFromRight() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.reveal
    self.subtype = CATransitionSubtype.fromRight
    return self
}
//New viewController will appear from left side of screen.
func popFromLeft() -> CATransition {
    self.duration = 0.1 //set the duration to whatever you'd like.
    self.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.easeInEaseOut)
    self.type = CATransitionType.reveal
    self.subtype = CATransitionSubtype.fromLeft
    return self
   }
}

这是实现上述扩展的方式：

    let nav = self.navigationController //grab an instance of the current navigationController
    DispatchQueue.main.async { //make sure all UI updates are on the main thread.
        nav?.view.layer.add(CATransition().segueFromLeft(), forKey: nil)
        nav?.pushViewController(YourViewController(), animated: false)
    }

Answer 2

let obj = self.storyboard?.instantiateViewController(withIdentifier: "ViewController")as! ViewController

        let transition:CATransition = CATransition()
        transition.duration = 0.3
        transition.timingFunction = CAMediaTimingFunction(name: kCAMediaTimingFunctionEaseInEaseOut)
        transition.type = kCATransitionPush
        transition.subtype = kCATransitionFromLeft
        self.navigationController!.view.layer.add(transition, forKey: kCATransition)

        self.navigationController?.pushViewController(obj, animated: true)

在那个时候使用popToViewController

 transition.subtype = kCATransitionFromRight