iOS - Tab Bar

Use of Tab Bar

It's generally used to switch between various subtasks, views or models within the same view.

Example for tab bar is shown below.

Important Properties

• backgroundImage
• items
• selectedItem

Sample Code and Steps

Step 1 − Create a new project and select Tabbed Application instead of the View Based application and click next, Give the project name and select create.

Step 2 − Here two view controllers are created by default and a tab bar is added to our application.

Step 3 − The AppDelegate.m didFinishLaunchingWithOptions method is as follows −

- (BOOL)application:(UIApplication *)application 
   didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] 
   bounds]];
   
   // Override point for customization after application launch.
   UIViewController *viewController1 = [[FirstViewController alloc] 
   initWithNibName:@"FirstViewController" bundle:nil];
   UIViewController *viewController2 = [[SecondViewController alloc] 
   initWithNibName:@"SecondViewController" bundle:nil];
   self.tabBarController = [[UITabBarController alloc] init];
   self.tabBarController.viewControllers = @[viewController1, 
   viewController2];
   self.window.rootViewController = self.tabBarController;
   [self.window makeKeyAndVisible];
   return YES;
}

Step 4 − Here, two view controllers are allocated and made as view controllers of our tab bar controller.

Step 5 − When we run the application, we'll get the following output −