iOS How can I use pushviewcontroller with NavigationController(Objective - c)

Question

I want to change view by clicking button with NavigationController

So I added a button to Main.storyboard and write some codes like

@property (weak, nonatomic) IBOutlet UIButton *button;

in my ViewController.m (Created automatically when I made my project)

And I added method

- (IBAction)buttonClicked:(id)sender {

SecondViewController *secondViewController = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];
[self.navigationController pushViewController:secondViewController animated:YES];

}

(I made SecondViewController.m, SecondViewController.h, SecondViewController.xib)

After this, I started the application and clicked the button but the screen didn't change.

Actually, when I added log like

NSLog(@"%@", self.navigationController);

null was printed.

I think I need to add some code about NavigationController to AppDelegate.m but I don't know what to do. Please help me.

Did you embed "Navigation Controller" in your storyboard? If you don't have storyboard, how are you showing FirstViewController? — Satyam
– Satyam, Commented Jun 17, 2017 at 18:17

Soumen · Accepted Answer · 2017-06-17 18:41:02Z

2

Try This,

in Appdelegate.m

`- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.viewController = [[ViewController alloc] initWithNibName:@"ViewController"
                                                   bundle:nil];
    UINavigationController *navigation = [[UINavigationController alloc]initWithRootViewController:self.viewController];
    self.window.rootViewController = navigation;
   [self.window makeKeyAndVisible];
   return YES;
}`

You need to embed Navigation Controller through code or Storyboard.

answered Jun 17, 2017 at 18:41

Soumen

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Comments

Priyam Dutta · Accepted Answer · 2017-06-17 18:49:55Z

0

First select your initial viewcontroller in storyboard and embed it in NavigationController.

Then give a storyboard identifier to the second viewcontroller.

Then lastly instantiate Second ViewController from storyboard and push it.

- (IBAction)buttonClicked:(id)sender {
SecondViewController *secondViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"SecondViewController"];
[self.navigationController pushViewController:entryController animated:YES];
}

answered Jun 17, 2017 at 18:49

Priyam Dutta

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