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copied!<p>I have solved it by putting a login view without any segues (to or from it) like in the screenshot below:</p> <p><img src="https://i.stack.imgur.com/hNIcN.png" alt="enter image description here"></p> <p>Then, I used a custom class in the tab bar controller to show it whenever I need it. </p> <p>In the tab bar controller class, I use 'viewDidLoad' to fire up the login view. To show the modal view, I do have a singleton thingy that stores some state, say BOOL isAuthenticated, where I do the magic:</p> <pre><code>- (void) performLoginIfRequired: (UIViewController *) source { if (!self.isAuthenticated) { NSLog(@"Is not authed"); UIStoryboard *storyboard = [UIApplication sharedApplication].delegate.window.rootViewController.storyboard; UIViewController *loginController = [storyboard instantiateViewControllerWithIdentifier:@"loginScreen"]; [source presentModalViewController:loginController animated:YES]; } else { NSLog(@"Is authe"); } } </code></pre> <p>And, in my case, I wanted it to be shown when the app first starts, but also when it enters foreground again. So, I registered my tab bar controller with the notification center, so I get notified if the app is coming back:</p> <pre><code>-(void)viewDidLoad { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(willEnterForeground:) name:UIApplicationWillEnterForegroundNotification object:nil]; } </code></pre> <p>In the willEnterForeground method, I do:</p> <pre><code>-(void) willEnterForeground: (NSNotification *)notification { [[myStateThingy defaultState] performLoginIfRequired:self]; } </code></pre>

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