如何从AppDelegate获取navController。 [英] How to get navController from AppDelegate.

问题描述

我想知道如何在iPhone编程中从 AppDelegate = [[UIApplication sharedApplication] delegate] 获取navController。例如，在我们引用AppDelegate的其他viewController中。

I am wondering, that how to get navController from AppDelegate = [[UIApplication sharedApplication] delegate] in the iPhone programming. e.g., in other viewController where we reference to the AppDelegate.

在applicationDelegate.h中我们有：

In the applicationDelegate.h we have:

UINavigationController *navController;

以下是applicationDelegate.m

And the following in applicationDelegate.m

- (void)applicationDidFinishLaunching:(UIApplication *)application {    

   [window addSubview: navController.view];
   [window makeKeyAndVisible];
}

无论如何从mainWindow获取navController：

Is there anyway to get the navController from the mainWindow:

UIWindow *mainWindow = [appDelegate window];

推荐答案

如果其他UIViewController包含在UINavigationController中，可以简单地调用：

If this other UIViewController is contained in the UINavigationController, you can simply call:

UINavigationController *navController = self.navigationController;

。

否则，您可以将UINavigationController设置为AppDelegate中的属性。

Otherwise, you can set UINavigationController as a property in the AppDelegate.

// AppDelegate.h
@property (nonatomic, strong) UINavigationController *navController;

然后访问 appDelegate.navController 。

或者，您可以将UINavigationController设置为窗口的rootViewController：

Or, you can set the UINavigationController as window's rootViewController:

[window setRootViewController:navController];

从任何地方拨打电话：

UINavigationController *navController = window.rootViewController;

这篇关于如何从AppDelegate获取navController。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！