如何根据远程通知在ios应用程序中更改初始视图控制器？

Question

I have an application that is implementing remote notifications. My desire is to change the initial view controller based on one of three conditions: the user started the app on their own (no notifications); or, the user received an suspicious activity alert; or, the user received a crime alert. I have implemented the application didReceiveRemoteNotification: method in the appDelegate. Based on the notification and the user response to the notification I have implemented the following code:

UITabBarController *tbContr = (UITabBarController*) self.window.rootViewController;
UINavigationController *navContr = [tbContr.viewControllers][2];
ViewCrimesController *viewCrimes = [navContr.storyboard instantiateViewControllerWithIdentifier:@"ViewCrimes"];
[navContr presentViewController:viewCrimes animated:YES completion:nil];

[self.window.makeKeyAndVisible];

The problem I am having is that the navigation controls -- ie, the back button and the navigation bar title; are not on the ViewCrimesController when it is presented. I have tried to load the ViewCrimesController many different ways. Each way I get either and error saying there is no segue (this view is a model view to map view) or I am attempting to load the over an active view or, again, I don't get the navigation controls.

Do I need to specifically program the navigation controls or am I missing something in the way I am attempting to load the view?

I have seen references to dynamically changing the initial view in other posts. But I have not seen anything that indicates specific programming is required to add the controls. Any help you can provide is greatly appreciated!

Susan

Answer 1

Have you looked at the post, Programmatically set the initial view controller using Storyboards

The answer from that post may solve your issue,

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:UIScreen.mainScreen.bounds];

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];

    UIViewController *viewController = // determine the initial view controller here and instantiate it with [storyboard instantiateViewControllerWithIdentifier:<storyboard id>];

   self.window.rootViewController = viewController;
   [self.window makeKeyAndVisible];

   return YES;
}

You can also download this sample, and implement it as per your requirement.

Answer 2

simply change the key window's rootViewController, sample code placed here, hope it helps:

UIStoryboard *storyboard = self.window.rootViewController.storyboard;
    UIViewController *rootViewController = [storyboard instantiateViewControllerWithIdentifier:@"rootNavigationController"];
    self.window.rootViewController = rootViewController;