Question

I have my ipad code created programmatically not using nib.I converted my ipad app to universal app as follows:

Choose the project target(the blue one on the sidebar). Summary -> iOS
Application Target -> set Devices to Universal.

Now I want to launch different app delegate for iphone and different app delegate for ipad.There is already one app delegate for ipad, now I want to create different app delegate for iphone so that in main.m I can launch different app delegate based on device(ipad & iphone).So my question is, can I create different app delegate, if yes then how?

Answer 1

in the projects main.m

you could do something like

int main(int argc, char *argv[])
{
    @autoreleasepool {

        NSString *appDelegateName;
        if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone){
            appDelegateName =  NSStringFromClass([AppDelegateIPhone class]);
        } else {
            appDelegateName =  NSStringFromClass([AppDelegateIPad class]);
        }
        return UIApplicationMain(argc, argv, nil, appDelegateName);
    }
}

But IMO you should not do it.

Instead doi it as apple does it to, in app delegate load different view controllers or different XIBs.

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
        self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPhone" bundle:nil] autorelease];
    } else {
        self.viewController = [[[ViewController alloc] initWithNibName:@"ViewController_iPad" bundle:nil] autorelease];
    }
    self.window.rootViewController = self.viewController;
    [self.window makeKeyAndVisible];
    return YES;
}



@end