一个UIWindow的“RootViewController的”出口之前到iOS上不可版本4.0

Question

我正在上预先的iOS 4.0以下错误构建：

The 'rootViewController' outlet of UIWindow is not available on releases prior to iOS 4.0. Remove the connection and instead programmatically add the view controller's view to the window after the application finishes launching. 

如何以及在哪里办这个程序？

Answer 1

让我们假装你有一个CoolViewController类。

里面你CoolAppDelegate.h你需要有这样的事情：

@class CoolViewController; 

@interface CoolAppDelegate.h : NSObject <UIApplicationDelegate> { 
    UIWindow *window; 
    CoolViewController *viewController; 
} 

然后你CoolAppDelegate.m将需要

application:applicationdidFinishLaunchingWithOptions: 

方法有一些像这样的代码：

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

    // Override point for customization after app launch. 

    // Add your cool controller's view to the window. 
    [window addSubview:viewController.view]; 
    [window makeKeyAndVisible]; 

    return YES; 
} 

为避免该错误，您可能还需要删除对IBOutlet的引用通过Interface Builder指向您的.xib文件中的rootViewController。