iOS - iOS - Universal Applications


iOS - Universal Applications



A universal application is an application that is designed for both iPhone and iPad in a single binary. A universal application allows code reuse and fast updates.

Universal Application â€" Steps Involved

Step 1. Create a simple View based application.
Step 2. Change the File name ViewController.xib file to ViewController_iPhone.xib as shown below in the file inspector in the right hand side.

Step 3. Select File -> New -> File... then select the subsection "User Interface" and select View. Click Next.

Step 4. Select the device family as iPad and click next.

Step 5. Save the file as ViewController_iPad.xib and select Create.
Step 6. Add a label in the center of the screen in both ViewController_iPhone.xib and ViewController_iPad.xib.
Step 7. In ViewController_iPad.xib, select the identity inspector and set the custom class as ViewController.

Step 8. Update the application:DidFinishLaunching:withOptions method in AppDelegate.m as follows âˆ'
  - (BOOL)application:(UIApplication *)application    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  {     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen      mainScreen] bounds]];     // Override point for customization after application launch.     if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) {          self.viewController = [[ViewController alloc]           initWithNibName:@"ViewController_iPhone" bundle:nil];     }     else{          self.viewController = [[ViewController alloc] initWithNibName:          @"ViewController_iPad" bundle:nil];     }     self.window.rootViewController = self.viewController;     [self.window makeKeyAndVisible];     return YES;  }    
Step 9. Update the devices in project summary to Universal as shown below âˆ'





Note: if any help is needed just comment us below we definately help you out

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