Launching ViewController from AppDelegate

Question

I have a custom URL scheme and i want to open a certain ViewController which is not the root when i go to this URL. I have been able to do that and what remains is pushing this ViewController into the navigationController from the AppDelegate where i handle my URL like this :

- (BOOL)application:(UIApplication *)application
     openURL:(NSURL *)url
     sourceApplication:(NSString *)sourceApplication
     annotation:(id)annotation {

if ([[url scheme] isEqualToString:@"njoftime"]) {

    NSDictionary *getListingResponse = [[NSDictionary alloc]init];
    getListingResponse = [Utils getListing:[url query]];;

    if ([[getListingResponse objectForKey:@"status"] isEqualToString:@"success"]) {
         ListingViewController *listingView = [[ListingViewController alloc]init];
         [self.window.rootViewController.navigationController pushViewController:listingView animated:YES];
         return YES;
    }

but it only launches my app and not the ListingViewController i want to launch. Any idea how can i do it differently ?

Answer 1

Issue

To deal with pushing and popping the viewControllers from AppDelegate, you need to use [UIApplication sharedApplication] which keeps track to all of viewControllers, beginning with root one.

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Solution

To PUSH ViewController from AppDelegate

ListingViewController *listingVC = [[ListingViewController alloc] init];
[(UINavigationController *)self.window.rootViewController pushViewController:listingVC animated:YES];

To POP that ViewController you just presented, you need to use this code

[(UINavigationController *)[UIApplication sharedApplication].keyWindow.rootViewController popViewControllerAnimated:YES ];

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Answer 2

If your using storyboard then you could use below lines for pushing your VC.

 UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil];
 YOURCLASS *obj=[storyboard instantiateViewControllerWithIdentifier:@"YOUR_CLASS_STORYBOARD_ID"];
[self.window.rootViewController.navigationController pushViewController:obj animated:YES];

Update:-

ListingViewController *listingVC = [[ListingViewController alloc] init];
UINavigationController *navCon = [[UINavigationController alloc] initWithRootViewController:listingVC];
[self.window.rootViewController presentViewController:navCon animated:YES completion:nil];