iosios7seguexcode5.0.1

segueing between view controllers with navigation controller


Lets say i have ViewController A with 2 buttons, each is segueing to ViewController B and C (one button to View B and other to C).From ViewController C I segueing to ViewController D. All the ViewControllers are with Navigation bar so from view B i can return to A, and from view D i can return to D->C->A. The problem is when i segueing between view D to B: the segue is performed but now in the navigation bar of B i retuned to view D and i want B will return to A like it should. what is the solution????


Solution

  • This can be done using two ways as far as i know.

    1) Use a custom back button on D controller

    2) Change the stack of navigationController i.e NSArray of self.navigationController.viewControllers in the class of D controller

    Use Custom back Button

    You can do it as follows in D controller.This is valid only if A controller is the rootViewController of navigationController.If you are keeping track of your A controller than you can use the following also

    Change the stack of navigationController

    This is useful if you want to navigate to a particular controller.But the back button still displays after getting back to A controller from B,that you might have to see yourself by making some changes.Don't try to change the navigation stack in prepareForSegue

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        NSMutableArray *controllers = [NSMutableArray arrayWithArray:self.navigationController.viewControllers];
        NSMutableSet *controllersToRemove = [NSMutableSet new];
            for (id viewController in controllers) {
                if (![viewController isKindOfClass:[self class]]&&![viewController isKindOfClass:[NRViewController class]]) {
                        [controllersToRemove addObject:viewController];
                    }
            }
    
            for (id controller in controllersToRemove) {
                [controllers removeObject:controller];
            }
        self.navigationController.viewControllers = controllers;
    }
    

    Edited Code for custom back button

    If you want the original back Button

    You have to use image for that with code as follow

    UIButton *backButton = [[UIButton alloc] initWithFrame: CGRectMake(0, 0, 60.0f, 30.0f)];
        UIImage *backImage = [[UIImage imageNamed:@"back_button_normal.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 12.0f, 0, 12.0f)];
        [backButton setBackgroundImage:backImage  forState:UIControlStateNormal];
        [backButton setTitle:@"Back" forState:UIControlStateNormal];
        [backButton addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *backButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
        self.navigationItem.leftBarButtonItem = backButtonItem;