使用一个动画关闭并呈现模态视图控制器 [英] Dismiss and present modal view controller with one animation

问题描述

问题是我不知道如何解雇并呈现只有一个过渡动画的视图控制器。

The problem is that I don't know how to dismiss and present a view controller with only one transition animation.

我的故事板结构是：

我们可以说 A 控制器就在NavigationController之后， B 是启动参考， C 是TabBar ViewController。 B 和 C 都以模态方式呈现 Cross Dissolve 转换。

We can say that A controller is what follows the NavigationController, B is the Startup reference and C is the TabBar ViewController. Both B and C are presented modally with a Cross Dissolve transition.

当用户登录应用程序时（来自 B ）， C 控制器以模态方式显示翻转水平过渡。当用户注销（来自 C ）时， B 以相同的方式显示。
在 A 控制器上，我执行直接转换为 B 或 C ，具体取决于用户是否已登录。

When a user logins into the app (from B), C controller is presented modally with a Flip horizontal transition. And when a user logouts (from C), B is presented in the same way. On A controller I perform a direct segue to B or C depending on if user is logged or not.

我的问题是，如果我不从 B 或 C 中解除以前的视图控制器，则该控制器会泄露。相反，如果我将其解雇，则会在目标控制器（ B 或 C ）出现之前显示 A 。

My problem is that if I don't dismiss previous view controller from B or C, that controller is leaked. On the contrary if I dismiss it, A is showed before the target controller (B or C) is presented.

是否可以仅显示水平翻转过渡并跳过 A 视图？

Is it possible to show only the Flip Horizontal transition and step over A view?

推荐答案

我对此问题的解决方案是替换当前的rootViewController，支持不同的转换：

My solution to this issue was replacing current rootViewController, supporting different transitions:

static func replaceRootViewController(with: UIViewController, transition: UIViewAnimationOptions, completion: (() -> ())? = nil) {        
    if transition == .transitionCrossDissolve {
        let overlayView = UIScreen.main.snapshotView(afterScreenUpdates: false)
        with.view.addSubview(overlayView)
        UIApplication.shared.keyWindow?.rootViewController = with

        UIView.animate(withDuration: 0.65, delay: 0, options: transition, animations: {
            overlayView.alpha = 0
        }, completion: { finished in
            overlayView.removeFromSuperview()
            if let completion = completion{
                completion()
            }
        })
    } else {
        _ = with.view
        UIView.transition(with: UIApplication.shared.keyWindow!, duration: 0.65,options: transition, animations: {
            UIApplication.shared.keyWindow?.rootViewController = with
        }){_ in
            if let completion = completion {
                completion()
            }

        }
    }
}

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