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POHow to access a property declared in a viewController which is assigned to UINavigationController?
 

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  1. POHow to access a property declared in a viewController which is assigned to UINavigationController?
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    <p>I am trying to implement a application which has five tabs totally. Each of tabs corresponds to a view controller, such as viewController1~viewController5.</p> <p>For the viewController4, I add the navigationController on it in AppDelegate.m as following:</p> <pre><code>viewController4 = [[iPhone_ASRAViewController alloc] initWithNibName:@"iPhone_ASRAViewController_iPhone" bundle:nil]; navController1 = [[UINavigationController alloc]initWithRootViewController:viewController4]; </code></pre> <p>In the iPhone_ASRViewController class, I have declared a property in .h file as following:</p> <pre><code> @property (nonatomic, retain) NSString *student_id; </code></pre> <p>Then, I want to access the student_id(set the student_id) which is declared in iPhone_ASRViewController in the FirstViewController, and implement in FirstViewController.m as following:</p> <pre><code>iPhone_ASRAViewController *iphone_ASRAVC= [self.tabBarController.viewControllers objectAtIndex:3]; iphone_ASRAVC.student_id=[stu_class stringByAppendingString:stu_id]; //stu_class and stu_id is the text field declared in the FirstViewController. </code></pre> <p>Ideally, when a certain button which is implemented in the FirstViewController class is pushed by users, the value of student_id will also be set to iPhone_ASRAViewController class.</p> <p>Unfortunately, the app will crash when users push the button. Error msgs as following:</p> <pre><code>[UINavigationController setStudent_id:]: unrecognized selector sent to instance 0x9341170 </code></pre> <p>Can someone provide me with some ideas/solutions to debug, please?</p>
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    1. COi don't know where to start. where did you implement the setter ?, why readwrite?
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      1. POHow to access a property declared in a viewController which is assigned to UINavigationController?
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