问题描述

我有 UIViewController 和 UITabBarController.UIViewController 包含 5 个按钮，UITabBarController 有 5 个选项卡.

I have UIViewController and UITabBarController. UIViewController contain 5 buttons and UITabBarController has 5 Tabs.

通过点击第一个按钮应用显示 TabBarController 与第一个选定的选项卡，第二个 - TabBarController 与第二个选项卡，依此类推...

By tapping first button app shows TabBarController with the first selected tab, second - TabBarController with the second tab and so on...

为了准备这个，我对每个按钮都使用了 Modal-segue.

To prepare this I have used Modal-segue for every button.

一切正常.

现在我需要在 TabBarController 的 UINavigationBar 上创建主页"按钮(可能以编程方式)，它将执行返回主页视图"操作.

Now I need to create "Home" button (may be programmatically) on TabBarController's UINavigationBar, which will execute "Go home view" action.

编辑了更多细节

{见下面的截图}

1. 初始 UIViewController
2. UITabBarController
3. 导航控制器
4. UIViewControllers

1 和 2 之间有两个模态转场(两个按钮 - 两个转场)

There are TWO modal-segues between 1 and 2 (two buttons - two segues)

在 UIViewController 中的 prepareForSegue 中:

In my prepareForSegue in UIViewController:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    AppDelegate *d = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    if ([segue.identifier isEqualToString:@"s1"]) {
        d.initialTab = 0;
    }
    else if ([segue.identifier isEqualToString:@"s2"]) {
        d.initialTab = 1;
    }
}

在我的 viewDidLoad 中的 UITabBarController:

In my viewDidLoad in UITabBarController:

TabController *mainTabController = (TabController *)self;
    AppDelegate *d = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    [mainTabController setSelectedIndex:d.initialTab];

这是可行的！

但是我需要回到主页.因此，如果 TabBarController 之后有 NavigationController，我想在 NavigationBar 中创建一个按钮.

But I need to go back to home-page. So if there is a NavigationController after TabBarController I would like to create a button in NavigationBar.

推荐答案

我建议你以一个 Navigation Controller 作为父级.
然后，将您的启动视图添加为它的根视图.

I suggest you to take a one Navigation Controller as a parent.
Then, add your Startup View as a root view of it.

在您的主视图控制器页面上，

On your main view controller page,

- (void)viewWillAppear:(BOOL)animated
{
   self.navigationController.navigationBarHidden = NO;
}

因此，它将隐藏您的主导航.所以无需担心这个内部导航流程.
而对于内部导航，您已经采用了不同的导航控制器.

So, it will hide your main navigation. So no need to worry for this internal navigation flow.
And for internal navigation, you have already taken different navigation controllers.

通过使用代码:

[self.parentViewController.navigationController popToRootViewControllerAnimated:YES];

您将位于应用程序的根目录，它将弹出所有堆叠在应用程序中的视图控制器.

you'll be at root of the application and it will poped out all view controller which were stacked in application.

希望您能理解流程和如果您感觉良好，将申请.

Hopefully, you'll understand flow & will apply if you feel good.

享受编码.
谢谢.

Enjoy Coding.
Thanks.

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