在Swift中的Nav Controller中弹出2个视图控制器 [英] Pop 2 view controllers in Nav Controller in Swift

问题描述

我发现很多方法可以使用Objective-C在 UINavigationController 中弹回2 UIViewControllers ，但是当我尝试并切换到Swift它似乎没有工作。

I have found many ways to pop back 2 UIViewControllers in UINavigationController using Objective-C, however when I try and switch that over to Swift it doesn't seem to be working.

回弹到 UIViewController 的最佳方法是什么？
任何指导都将被赞赏
谢谢

What would be the best approach to pop back to UIViewController? Any guidance would be appreciated Thanks

推荐答案

扩展我的评论，找到第二个最后一个视图控制器在viewControllers数组中，然后使用popToViewController来避免覆盖整个视图控制器堆栈。

Expanding on my comment, find the second last view controller in the viewControllers array and then use popToViewController to avoid overwriting the entire view controller stack.

示例（假设导航控制器有多个视图控制器）：

Example (assumes the navigation controller has more than 1 view controller):

func backTwo() {
    let viewControllers: [UIViewController] = self.navigationController!.viewControllers as [UIViewController]
    self.navigationController!.popToViewController(viewControllers[viewControllers.count - 3], animated: true)
}

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