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POCreating a UITabBarController using a NIB outside of AppDelegate?
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  1. POCreating a UITabBarController using a NIB outside of AppDelegate?
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    copied!<p>Still new to iOS programming, and despite copious amounts of research, I have run in to another roadblock.</p> <p><strong>What I want to implement:</strong></p> <p>I want a UITabBarController that gets loaded when I navigate from the main UI. I would also like to use a NIB to define its properties.</p> <p>All of the examples I can find put the UITabBarController in the AppDelegate, but I would not like to load it unless it gets used. I also dont know if all of the UIGestureRecognizers would remain active if I just did it modally (I cant get a working implementation).</p> <p><strong>What I have so far</strong></p> <p>First, I load an initial loading view from AppDelegate</p> <p><em><strong>AppDelegate.h</em></strong></p> <pre><code>@class InitialViewController; @interface AppDelegate : UIResponder &lt;UIApplicationDelegate&gt; @property (strong, nonatomic) UIWindow *window; @property (strong, nonatomic) UIViewController *viewController; @end </code></pre> <p><em><strong>AppDelegate.m</em></strong></p> <pre><code>- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; // Override point for customization after application launch. self.viewController = [[InitialViewController alloc] initWithNibName:@"InitialViewController" bundle:nil]; self.window.rootViewController = self.viewController; [self.window makeKeyAndVisible]; return YES; } </code></pre> <p>From this view, as I am just making a skeleton of the UI, I have two buttons, one goes to what would be the main interface, and the other to the UITabBarController.</p> <p><em><strong>InitialViewController.h</em></strong></p> <pre><code>@interface InitialViewController : UIViewController - (IBAction)toMain:(id)sender; - (IBAction)toTabs:(id)sender; @property (strong, nonatomic) UIViewController *mviewController; @property (strong, nonatomic) UIViewController *tviewController; @end </code></pre> <p><em><strong>InitialViewController.m</em></strong></p> <pre><code>- (IBAction)toMain:(id)sender { self.mviewController = [[MainViewController alloc] initWithNibName:@"MainViewController" bundle:nil]; [[[UIApplication sharedApplication] delegate] window].rootViewController = self.mviewController; } - (IBAction)toTabs:(id)sender { self.tviewController = [[tabViewController alloc] initWithNibName:@"tabViewController" bundle:nil]; [[[UIApplication sharedApplication] delegate] window].rootViewController = self.tviewController; } </code></pre> <p>On loading MainViewController, it behaves exactly like I want. But when I load the tab view, I get one long tab at the bottom and a black background. I can add in things in viewdidload, like changing the background color, but no actual tabs or views linked to the tabs in the XIB. </p> <p>I suspect there is something I am missing in two areas: in the tab .h, and some linking associated with that in interface builder. Or setting a new rootViewController isnt enough.</p> <p><em><strong>tabBarController.h</em></strong></p> <pre><code>#import &lt;UIKit/UIKit.h&gt; @interface iPodViewController : UITabBarController &lt;UITabBarControllerDelegate&gt; @end </code></pre> <p>If someone can point me in the right direction and/or show me an implementation that works, I would be most grateful.</p> <p>-- as a note, when I go in to the tabbar.xib, and use the assistant editor, it opens InitialViewController.h --</p>
 

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