Question

I am doing a universal application which has 2 app delegates separately for iPhone and iPad. Can I check the device in a single app delegate using a bool value set to yes something like BOOL isiPhone and the method +(AppDelegate*)instance;. Then how can I launch different views? I got some code snippet like this

@interface AppDelegate : NSObject <UIApplicationDelegate, NSFetchedResultsControllerDelegate> {

UIWindow* window;
BOOL isiPhone;

@property (nonatomic, retain) IBOutlet UIWindow* window;
@property (nonatomic, assign) BOOL isiPhone;

+ (AppDelegate*)instance;

@end

And in the Application’s App Delegate m file:

@synthesize m_ForIPhone;

self.MapVC = [[MapViewController alloc] initWithNibName:(self.isiPhone ? @"MapView" : @"MapView@pad") bundle:nil];
self.DetailVC = [[DetailViewController alloc] initWithNibName:self.isiPhone ? @"DetailView" : @"DetailView@pad" bundle:nil];

self.AboutVC = [[AboutViewController alloc] initWithNibName:self.isiPhone ? @"AboutView" : @"AboutView@pad" bundle:nil];

Answer 1

Use the Following Code

id<UIApplicationDelegate> delegate = [[UIApplication sharedApplication] delegate]; 

if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
AppDelegate_iPad *appDelegate = (AppDelegate_iPad *) delegate;

else
AppDelegate_iPhone *appDelegate = (AppDelegate_iPhone *) delegate;

whenever you are required to access to the delegate.