如何從CustomViewController中更改RootViewController（在AppDelegate中）？

Question

好日子，

我的應用程序已被授權形式被裝載在AppDelegate中，並在簽名（檢查是在SigninController.m）後TabBarController應該出現（如應用程序的主視圖）（SigninController）。

我該如何改變控制器從登錄到TabBar和？

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
    { 
SigninController *aSigninController = [[SigninController alloc] initWithNibName:@"SigninView" bundle:nil]; 
self.currentController = aSigninController; 
[aSigninController release]; 

self.window.rootViewController = self.currentController; 
[self.window makeKeyAndVisible]; 
return YES; 
} 

SigninController.m

- (IBAction)signinClick 
{ 
........ 
if (loginOK == YES) 
{   
     //This place is ready to send messages to show TabBar 
} else { 
    UIAlertView *alert = ...... 
    [alert show]; 
    [alert release]; 
}  
} 

Answer 1

[appDelegate.window addSubview:appDelegate.tabbarController.view]; 

[self.view removeFromSuperview]; 

的appDelegate是應用程序共享委託。

MyAppDelegate *delegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];