UIViewController中的iPhone UINavigationController [英] iPhone UINavigationController inside UIViewController

问题描述

步骤：

• 列表项


• 创建一个名为Nav的项目。


• 创建一个新的 UIViewController BaseViewController（带有XIB）和FirstViewController（带有XIB）。



• 在 NavAppDelegat.h 中定义baseController变量

• List item
• Create a project called Nav.
• Create a new UIViewController BaseViewController (with XIB) and FirstViewController (with XIB).

• In the NavAppDelegat.h define baseController variable

@interface NavAppDelegate : NSObject <UIApplicationDelegate> {
BaseViewController *baseController;
}
@property (nonatomic, retain) IBOutlet BaseViewController *baseController; 

在 NavAppDelegat.m 将baseController添加到窗口：

In the NavAppDelegat.m add baseController to the window:

@synthesize baseController;
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
[self.window addSubview:baseController.view];
[self.window makeKeyAndVisible];
return YES;
}

打开BaseViewController.xib文件并添加 UINavigationController ，将其Root View Controller类和XIB设置为FirstViewController（在检查器中）。

Open the BaseViewController.xib file and add UINavigationController, set its Root View Controller class and XIB to FirstViewController (in the inspector).

我相信这应该向我展示带有导航栏的FirstViewController。如果我直接在MainWindow.xib上执行此操作，我的工作正常，但在这里我看不到导航栏。我错过了什么？ THx！

I believe this should show me the FirstViewController with the navigation bar. If I do this directly on the MainWindow.xib things are working as I expected but here I can't see the navigation bar. What am I missing? THx!

更新：
所以问题只是在我使用 UINavigationController 的情况下控制器（这里是BaseViewController.xib）而不是MainWindow.xib我看不到导航栏。

UPDATE: So the problem is only that in case I use UINavigationController inside some additional controller (BaseViewController.xib here) instead of MainWindow.xib i don't see the navigation bar.

推荐答案

我不能告诉您是否尝试将导航控制器直接连接到窗口，只需从第二个XIB（应该可以工作）或者如果您将导航控制器设置为另一个视图的子视图，这将无效。

I can't tell if you're trying to connect your navigation controller directly to your window, just from a second XIB (which should work) or if you're making your navigation controller a subview of another view, which won't work.

UINavigationController 仅用作 UIWindow 或作为 UITabController 的子视图。 Apple不希望您在其他环境中嵌入导航控制器。

UINavigationController is only intended to be used as either the primary subview of a UIWindow or as a subview of a UITabController. Apple doesn't want you embedding a navigation controller in other contexts.

参见组合视图控制器接口。

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