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POiOS Storyboard - Navigation Controller Not Working
 

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  1. POiOS Storyboard - Navigation Controller Not Working
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    <p>I am having trouble with a Navigation Controller in my iOS project which uses Storyboards.</p> <p>The main part of the project is a UITabBar. When the app loads for the very first time the screen RegisterViewController is presented:</p> <p><img src="https://i.stack.imgur.com/JPxcP.png" alt="Register View Controller"></p> <p>When the user taps on the "Register" button a HTTP POST request is made, then upon receiving the response (JSON object) the screen QuestionnaireViewController is presented using:</p> <pre><code>UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]; QuestionnaireViewController *questionnaireViewController = [mainStoryboard instantiateViewControllerWithIdentifier:@"QuestionnaireView"]; [questionnaireViewController setModalTransitionStyle:UIModalTransitionStyleCrossDissolve]; [questionnaireViewController setQuestionsAndAnswers:_questionsAndAnswers]; [self presentViewController:questionnaireViewController animated:NO completion:nil]; </code></pre> <p><img src="https://i.stack.imgur.com/NqDsj.png" alt="Questionnaire View Controller"></p> <p>When the user taps on a cell in QuestionnaireViewController a message is sent to prepareForSegue:sender:</p> <pre><code>- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { UINavigationController *navigationController = segue.destinationViewController; AnswersViewController *answersViewController = [[navigationController viewControllers] objectAtIndex:0]; NSIndexPath *indexPath = [self.tableView indexPathForCell:sender]; NSArray *answers = [[_questionsAndAnswers objectAtIndex:indexPath.row] objectForKey:@"answers"]; [answersViewController setAnswers:answers]; } </code></pre> <p>At this point the app crashes with an error of: -[AnswersViewController viewControllers]: unrecognized selector sent to instance.</p> <p>Below is a more comprehensive overview of my storyboard, which may help in understanding where I have gone wrong:</p> <p><img src="https://i.stack.imgur.com/A3Yda.png" alt="Storyboard"></p> <p>I am stumped as to how to fix this, and am hoping that someone out there is able to help.</p> <p>Thanks, Nick</p>
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    1. COYou shouldn't be presenting questionnaireViewController, you should be presenting the navigation controller that it's embedded in. Then in prepareForSegue, you don't need to do anything with a navigation controller, AnswersViewController is the destination view controller.
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      1. USrdelmar
    2. COrdelmar: I feel a bit stupid now - how do I present the navigation controller that questionnaireViewController is embedded in?
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      1. USNick
    3. COJust like any other controller, give it an identifier and use instantiateViewControllerWithIdentifier:, followed by presentViewControllerAnimated:completion.
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      1. USrdelmar
 

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