viewController and pushViewcontroller not working?

Question

I am trying pushViewController in iOS.But the execution result is following

My Fist view

Second View

When i hit the button it will make a transition from view A to View B. Here is my code for view A

#import <UIKit/UIKit.h>
#import "ViewControllerB.h"

@interface ViewControllerA : UIViewController

-(IBAction)next:(id)sender;

@end

in .m file

#import "ViewControllerA.h"
@interface ViewControllerA ()
@end

@implementation ViewControllerA
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}
-(IBAction)next:(id)sender
{
    ViewControllerB *viewController=[[ViewControllerB alloc]init];
    viewController.string=@"tunvir";
    [self.navigationController pushViewController:viewController animated:YES];
}
@end

in viewController B

@interface ViewControllerB : UIViewController

@property (nonatomic,strong)NSString *string;

@end

In .m file

#import "ViewControllerB.h"

@interface ViewControllerB ()

@end

@implementation ViewControllerB

@synthesize string=_string;

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}
@end

In want to set the string in viewB to "tunvir" and load the object as viewB. but a lot of warning appears.Why this is happening and how to fix this?Thanks

nested push animation can result in corrupted navigation bar 2013-05-14 14:55:36.881 TestBarDelegate[1687:11303] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted. 2013-05-14 14:55:36.883 TestBarDelegate[1687:11303] Unbalanced calls to begin/end appearance transitions for <ViewControllerB: 0x7173f70>. — Tunvir Rahman Tusher
– Tunvir Rahman Tusher, Commented May 14, 2013 at 9:40
Your code is working. Second screen get dark because of default view background set to black. Why you are getting so many warnings? Did u initialize the navigation controller properly in AppDelegate? — Augustine P A
– Augustine P A, Commented May 14, 2013 at 10:10

Anil Varghese · Accepted Answer · 2013-05-14 10:16:20Z

3

If you are using storyboard do like this..

-(IBAction)next:(id)sender 
{

ViewControllerB *viewController=[self.storyboard instantiateViewControllerWithIdentifier:@"viewControllerB"];
viewController.string=@"tunvir";
[self.navigationController pushViewController:viewController animated:YES];
}

Dont forget to give StoryboardId for the viewControllerB as viewControllerB

answered May 14, 2013 at 10:16

Anil Varghese

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Comments

Bonnie · Accepted Answer · 2013-05-14 10:09:33Z

1

if you only need to set the title for the navigationBar of the ViewControllerB'

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.navigationItem.title = @"Title for NavigationBar";
}

EDIT use this if ur using Storyboard

-(IBAction)next:(id)sender
{
UIStoryboard *storyboard = [[UIStoryboard storyboardWithName:@"MainStoryboard" 
                              bundle:NULL]
UIViewController *viewControllerb = [storyboard instantiateViewControllerWithIdentifier:@"ViewControllerB"];
[[self navigationController] pushViewController:viewControllerb animated:YES];
}

edited May 14, 2013 at 10:09

answered May 14, 2013 at 9:41

Bonnie

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2 Comments

Tunvir Rahman Tusher Over a year ago

causing exception and crash the program.

Mike Pollard Over a year ago

If you're using a Storyboard then why not use a segue instead of having to implement the pushViewController: yourself ...

Nirav Gadhiya · Accepted Answer · 2013-05-14 09:43:35Z

0

replace ViewControllerB *viewController=[[ViewControllerB alloc]init]; with

ViewControllerB *viewController=[[ViewControllerB alloc] initWithNibName:@"ViewControllerB" bundle:nil];

answered May 14, 2013 at 9:43

Nirav Gadhiya

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2 Comments

Tunvir Rahman Tusher Over a year ago

causing exception and crash the program.

Nirav Gadhiya Over a year ago

this might be because compiler cant find nib file for @"ViewControllerB"

BhushanVU · Accepted Answer · 2013-05-14 09:43:37Z

0

try below code...

 -(IBAction)next:(id)sender
    {
        ViewControllerB *viewController=[[ViewControllerB alloc]initWithNibName:@"ViewControllerB" bundle:nil];
        viewController.string=@"tunvir";
        [self.navigationController pushViewController:viewController animated:YES];
    }

answered May 14, 2013 at 9:43

BhushanVU

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2 Comments

Tunvir Rahman Tusher Over a year ago

causing exception and crash the program.

BhushanVU Over a year ago

do you have xib of ViewControllerB? and why you are using viewController.string=@"tunvir"; this line ?

Lithu T.V · Accepted Answer · 2013-05-14 10:00:37Z

0

Yo uare not initialising properly .Use

ViewControllerB *viewController=[[ViewControllerB alloc] initWithNibName:@"ViewControllerBXIbFileNAme" bundle:nil];

instead of

ViewControllerB *viewController=[[ViewControllerB alloc]init];

answered May 14, 2013 at 10:00

Lithu T.V

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