如何添加2 ViewControllers到同一个窗口 [英] How to add 2 ViewControllers to the same window

问题描述

我在iTunes U中跟随斯坦福的iPhone开发课程，并且我的任务之一有问题（Paparazzi，如果有人熟悉）。

I am following Stanford's iPhone Development course in iTunes U and I'm having problem with one of their assignments (Paparazzi, if anyone is familiar).

'm尝试做是基本上创建这个视图作为应用程序启动时的第一个屏幕：

What I'm trying to do is basically to create this view as the first 'screen' upon application launch:

这是我在应用程序委托中的代码：

And this is the code that I have in the app delegate:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    

    // PersonListViewController is the 'content' of the screen (image, name, and button)
 PersonListViewController* personList = [[PersonListViewController alloc] initWithNibName:@"PersonListViewController" bundle:[NSBundle mainBundle]];
 navController = [[UINavigationController alloc] initWithRootViewController:personList];
 [personList release];

 UITabBarController* tabBarController = [[UITabBarController alloc] init];
 [window addSubview:[tabBarController view]];
 [window addSubview:[navController view]];
    [window makeKeyAndVisible];

 return YES;
}

但是这个代码似乎没有在底部显示tabBar导航栏和中间的视图（图像，名称和按钮）。

But this code doesn't seem to show the tabBar on the bottom, only the navigation bar and the view in the middle (image, name, and the button).

有人可以向我解释我做错了什么，如何解决？ / p>

Can someone explain to me what I did wrong and how to fix it?

推荐答案

你通常做的是嵌套你的主要ViewController（在这种情况下， PersonListViewController ）in UINavigationController （像你做的），但是你设置 tabBarController.viewControllers 属性等于

What you typically do is nest your main ViewController (in this case, PersonListViewController) inside a UINavigationController (like you have done), but then you set the tabBarController.viewControllers property equal to an array of view controllers (one for each tab).

在这种情况下，这将是

tabBarController.viewControllers = [NSArray arrayWithObject:navController];

然后只将tabBarController的视图添加到窗口

Then add only the tabBarController's view to the window

[window addSubview:[tabBarController view];

这将给你的列表，在nav控制器内，tab控制器将只有一个标签，现在）。

This will give you your list, inside a nav controller, inside a tab controller (and the tab controller will only have one tab, for now).

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