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manuelBetancurt
manuelBetancurt

Reputation: 16138

iphone combined tab bar and navigationController

Im implementing a combined tab bar and navigation programatically, using the apple documentation,

it is not working when calling the initWithFrame,[goes black screen]; but if left as below code it works for showing main screen, with out the tab bar, and when using the tab bar goes black screen

here the code

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(  NSDictionary *)launchOptions {                  
self.tabBarController = [[[UITabBarController alloc] init] autorelease];
StartViewController *startViewControllerView = [[[StartViewController alloc] init] autorelease]; //ojo recomendado por apple!!!
VideosViewController* VideosViewController_ = [[[VideosViewController alloc] init] autorelease];
PhotosViewController* PhotosViewController_ = [[[PhotosViewController alloc] init] autorelease];
SocialViewController* SocialViewController_ = [[[SocialViewController alloc] init] autorelease];
self.pagesNavigation = [[[UINavigationController alloc] initWithRootViewController:startViewControllerView] autorelease];
self.pagesNavigation.navigationBarHidden = NO;
NSArray* controllers = [NSArray arrayWithObjects:VideosViewController_, PhotosViewController_, SocialViewController_, startViewControllerView, nil];
self.tabBarController.viewControllers = controllers;

[self.window addSubview:startViewControllerView.view];
//self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
[self.window makeKeyAndVisible];
  return YES;
}

so if left as shown above, it works but if I comment the addSubview and uncomment the initWithFrame, it doesnt work,,

  //[self.window addSubview:startViewControllerView.view];
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

So, what Im i missing?, what would be the right way to call the initWithFrame?

thanks a lot!

Upvotes: 0

Views: 1431

Answers (1)

mjisrawi
mjisrawi

Reputation: 7936

Why are all your viewcontrollers auto released? You should probably be retaining them and releasing them only when you're done with them.

As for your structure, I've found that building a single navigation controller for each tab in the tabbarcontroller, adding those to the controller, then adding the tabbarcontroller to the window works like this...

AppDelegate.h

property (nonatomic, retain) UITabBarController *tabBarController;
property (nonatomic, retain) UINavigationController *firstNavController;
property (nonatomic, retain) UINavigationController *secondNavController;
property (nonatomic, retain) FirstViewController *firstViewController;
property (nonatomic, retain) SecondViewController *secondViewController;

AppDelegate.m

firstViewController = [[FirstViewController alloc] someInitMethod:someArg];
firstNavController = [[UINavigationController alloc] initWithRootViewController:firstViewController]; 

secondViewController = [[SecondViewController alloc] someInitMethod:someArg];
secondNavController = [[UINavigationController alloc] initWithRootViewController:secondViewController]; 

tabBarController = [[UITabbarController alloc] init];

NSArray *tabs = [NSArray arrayWithObjects:firstNavController, secondNavController, nil];

[tabBarController setViewControllers:tabs animated:NO];

self.window.rootViewController = tabBarController;
[self.window makeKeyAndVisible];

Upvotes: 1

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