ios - 在 xcode6 中的 UINavigationController segues 之间切换？

Question

我有一个 View Controller ，可以呈现 2 个导航 View Controller ，每个 View Controller 都有自己的 View Controller 堆栈:

现在我希望能够随时切换这些导航 Controller 。我通过新的展示功能展示它们。例如，我深入了解顶部导航 Controller 的层次结构，我想切换到底部。我可以只调用 WebView Controller 吗

UIViewController *rootController = (UIViewController *)[UIApplication sharedApplication].keyWindow.rootViewController;
[rootController performSegueWithIdentifier:@"sessionsNavigationController" sender:nil];

这是否会将顶部 Controller 保留在堆栈上并将底部 Controller 放在它上面，它会取代它们吗？

英语不是我的母语，但如果我不清楚我想要什么，我会尝试提供一些额外的信息。

Answer 1

最好的方法是在 AppDelegate.m 中自己处理切换

UINavigationController* firstNVC;
UINavigationController* secondNVC;
BOOL showingFirst;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    //Store two local pointers to the Navigation Controllers you want to switch between
    self.firstNVC = [[UIStoryboard storyboardWithName:@"main" bundle:nil] instantiateViewControllerWithIdentifier:@"firstNVC"];
    self.secondNVC = [[UIStoryboard storyboardWithName:@"main" bundle:nil] instantiateViewControllerWithIdentifier:@"secondNVC"];
    //Add yourself to listen for a notification to switch controllers
    [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(switchViews:)
                                             name:@"switchViews"
                                           object:nil];
    //Set toggle bool
    showingFirst = TRUE;
    //Set first view to show
    self.window.rootViewController = self.firstNVC;
    return YES;
}

- (void)switchViews:(NSNotification *)notification 
{
    //Swap viewcontrollers
    if(showingFirst)
        self.window.rootViewController = self.secondNVC;
    else
        self.window.rootViewController = self.firstNVC;
    //Toggle bool
    showingFirst = !showingFirst;
}

然后在您的应用程序中您想要切换 Controller 的任何地方，只需使用此行向您的 AppDelegate 发布通知

[[NSNotificationCenter defaultCenter] postNotificationName:@"switchViews" object:self userInfo:nil];