Insert View controller before SplitViewController - objective-c

Question

I want to insert a RootViewController before my SplitViewController.
My code in AppDelegate is:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
[_window addSubview:[_viewController view]];
[_window makeKeyAndVisible];
return YES;
}
Delegate call to my rootviewcontroller and in this i want to call to my splitviewcontroller:
- (void)viewDidLoad
{
[super viewDidLoad];
SplitViewController *splitViewController = [SplitViewController initApp];
[[self navigationController] pushViewController:splitViewController animated:YES];
}
In my SplitViewController i have this method:
+ (YetSplitViewController*) initApp
{
YetSplitViewController * cont = [[YetSplitViewController alloc] initWithNibName:#"YetSplitViewController" bundle:nil];
if (NO)
{
cont.splitWidth = 15.0;
}
return [cont autorelease];
}
After that not found good.......
My first code call from delegate to my SplitViewController:
#interface TemplateAppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) IBOutlet UIWindow *window;
#property (readonly, nonatomic) IBOutlet YetSplitViewController *splitViewController;
#property (readonly, nonatomic) IBOutlet MasterViewController *rootViewController;
#property (readonly, nonatomic) IBOutlet DetailViewController *detailViewController;
#end
#implementation TemplateAppDelegate
#synthesize window = _window;
#synthesize splitViewController = _splitViewController;
#synthesize rootViewController = _rootViewController;
#synthesize detailViewController = _detailViewController;
- (void)dealloc
{
[_window release];
[_splitViewController release];
[_rootViewController release];
[_detailViewController release];
[super dealloc];
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if (NO)
{
_splitViewController.splitWidth = 15.0;
}
[_window addSubview:_splitViewController.view];
[_window makeKeyAndVisible];
return YES;
}
#end