How to set rootViewController for navigation view controller and tabbar controller in AppDelegate - ios

Question

i have this problem. When i set rootViewController for TabbarController, it show correctly. But i set another rootViewController for navigation bar, TabbarController will not able to display. Any idea?
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
self.window.rootViewController = [[DCTabBarController alloc] init];
DCTabBarController *tabBar = (DCTabBarController *)self.window.rootViewController;
[tabBar setSelectedIndex:2];
Map_ViewController *vc = [[Map_ViewController alloc] init];
UINavigationController *rootNav = [[UINavigationController alloc] initWithRootViewController:vc];
[rootNav.navigationBar setBackgroundImage:[UIImage imageNamed:#"navbarBackImage"] forBarMetrics:UIBarMetricsDefault];
rootNav.navigationBar.tintColor = [UIColor whiteColor];
[rootNav.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName, nil]];
LeftViewController *leftVC = [[LeftViewController alloc] init];
RightViewController *rightVC = [[RightViewController alloc] init];
XLSlideMenu *slideMenu = [[XLSlideMenu alloc] initWithRootViewController:rootNav];
slideMenu.leftViewController = leftVC;
slideMenu.rightViewController = rightVC;
self.window.rootViewController = slideMenu;
[self.window makeKeyAndVisible];
return YES;
}
After applied Adeel solution, here is the output.But items in tabbar will not display accordingly.

Answer 1

One important thing to mention here is that an application's window can have only one rootViewController (of course). Like I said in my comment as well, you probably want to do something like this.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
Map_ViewController *vc = [[Map_ViewController alloc] init];
UINavigationController *rootNav = [[UINavigationController alloc] initWithRootViewController:vc];
[rootNav.navigationBar setBackgroundImage:[UIImage imageNamed:#"navbarBackImage"] forBarMetrics:UIBarMetricsDefault];
rootNav.navigationBar.tintColor = [UIColor whiteColor];
[rootNav.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName, nil]];
DCTabBarController *tabBar = [[DCTabBarController alloc] init];
[tabBar setViewControllers:#[rootNav]];
self.window.rootViewController = tabBar;
LeftViewController *leftVC = [[LeftViewController alloc] init];
RightViewController *rightVC = [[RightViewController alloc] init];
XLSlideMenu *slideMenu = [[XLSlideMenu alloc] initWithRootViewController:tabBar];
slideMenu.leftViewController = leftVC;
slideMenu.rightViewController = rightVC;
self.window.rootViewController = slideMenu;
[self.window makeKeyAndVisible];
return YES;
}