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POTabBarController doesn't load ViewControllers with CoreData
 

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  1. POTabBarController doesn't load ViewControllers with CoreData
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    <p>It's strange but when I test my two <code>ViewControllers</code> separately, they work just fine. When they are inside of the <code>TabBarController</code> with the following code they don't work anymore - they don't get loaded. I have a breakpoint in the <code>viewDidLoad</code> method, which is not being called.</p> <p>I had done a dummy of my project before I started working with <code>CoreData</code> and it was working perfectly with this code. So the problem started when the view controllers got their data from <code>CoreData</code>.</p> <p>Thinking that <code>CoreData</code> was the problem, I decided to implement a <code>UITabBarController</code> in the <code>CoreDataBooks</code> example from Apple. It worked just fine.</p> <p>I found some threads addressing some issues with <code>CoreData</code> and <code>TabBarControllers</code> but these where using IB. I don't have any .xib files in my project! </p> <p>I'm clueless. Suggestions will be very appreciated!</p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { UITabBarController *tabBarController = [[UITabBarController alloc] init]; ProjectRootViewController *projectRootViewController = [[ProjectRootViewController alloc] initWithStyle:UITableViewStylePlain]; WorkTimeRootViewController *workTimeRootViewController = [[WorkTimeRootViewController alloc] initWithStyle:UITableViewStylePlain]; NSManagedObjectContext *context = [self managedObjectContext]; if (!context) { NSLog(@"Problems loading context."); } projectRootViewController.managedObjectContext = context; workTimeRootViewController.managedObjectContext = context; UINavigationController *projectNavigationController = [[UINavigationController alloc] initWithRootViewController:projectRootViewController]; UINavigationController *workTimeNavigationController = [[UINavigationController alloc] initWithRootViewController:workTimeRootViewController]; [projectRootViewController release]; [workTimeRootViewController release]; navigationControllers = [[NSArray alloc] initWithObjects:projectNavigationController, workTimeNavigationController, nil]; [projectNavigationController release]; [workTimeNavigationController release]; [tabBarController setViewControllers:navigationControllers]; [self.window addSubview:[tabBarController view]]; [tabBarController release]; [self.window makeKeyAndVisible]; return YES; } </code></pre>
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    1. COtry putting the code in viewWillAppear instead of viewDidLoad.. viewDidLoad will be called only when the view is loaded (typically only once) while viewWillAppear will be called every time your view appears.. so you will have fresh data every time..
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      1. POTabBarController doesn't load ViewControllers with CoreData
      1. USlukya
    2. COViewWillAppear doesn't get called either. The initializer is the only method that's being called.
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      1. USstrave
    3. COthats strange... as a workaround, you can set your appDelegate as your tab bar controller's delegate and override tabBarController:didSelectViewController: method and call the viewController's viewWillAppear yourself..
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      1. USlukya
 

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