Answer by kubi for Dynamically load nib for iPhone/iPad within view controller

EDIT: @Adam's answer below is the correct answer.

To determine which nib to load, do the following, and scrap your initWithMyLovelyData method and use a property to set the data. You should be able to easily move all your init code into the property setter method.

MyViewController *viewController;if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {    viewController = [[MyViewController alloc] initWithNibName:@"ipadNIB" bundle:nil];} else {    viewController = [[MyViewController alloc] initWithNibName:@"iphoneNIB" bundle:nil];}viewController.myLovelyData = someData;