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POHow to change the present view controller?
 

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  1. POHow to change the present view controller?
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    <p>I have a login view controller which make a request to the server for authentification. Once it is success, I want the present view controller to be the home tab view controller of my application. I did try to use pushViewController:viewController or presentModalViewController or dismissModalViewControllerAnimated. Nothing works. You can take a look at the screenshot provided to understand my application flow.</p> <p>Here is some sample code:</p> <pre><code>- (IBAction)facebookLoginButtonClick:(id)sender { // get the app delegate so that we can access the session property AppDelegate *appDelegate = [[UIApplication sharedApplication]delegate]; // this button's job is to flip-flop the session from open to closed if (appDelegate.session.isOpen) { // if a user logs out explicitly, we delete any cached token information, and next // time they run the applicaiton they will be presented with log in UX again; most // users will simply close the app or switch away, without logging out; this will // cause the implicit cached-token login to occur on next launch of the application [appDelegate.session closeAndClearTokenInformation]; } else { if (appDelegate.session.state != FBSessionStateCreated) { // Create a new, logged out session. appDelegate.session = [[FBSession alloc] init]; } // if the session isn't open, let's open it now and present the login UX to the user [appDelegate.session openWithCompletionHandler:^(FBSession *session, FBSessionState status, NSError *error) { // and here we make sure to update our UX according to the new session state [self dismissModalViewControllerAnimated:YES]; UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard_iPhone" bundle: nil]; MainViewTabBarController *viewController = (MainViewTabBarController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"mainPageTabBarId"]; [[self navigationController] presentModalViewController:viewController animated:YES]; }]; } </code></pre> <p>}</p> <p><img src="https://i.stack.imgur.com/e3nAm.png" alt="enter image description here"></p>
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    1. PTQuestion
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    1. USflashsnake
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      1. POHow to change the present view controller?
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    1. COWhen you say it doesn't work, do you mean that the button is completely unresponsive? Are you doing any error checking? Log statements to see whether the completion block returns a valid FBSession?
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      1. POHow to change the present view controller?
      1. USgeraldWilliam
    2. COIs there something to the left of the 2 arrows pointing to your view controllers? It looks like you have 2 controllers both set as the initial controller (which isn't possible I don't think).
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      1. USrdelmar
    3. COThe button response. But the app crash.
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      1. POHow to change the present view controller?
      1. USflashsnake
 

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