How to switch to next controller on button click in ios (programmaticaly)

Question

I am working on single view application. On click of button i want to switch to next page(let say menu controller). Please specify what changes I have to make in appdelegate to add a navigation controller as I am completely new to iOS.

[button addTarget:select action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside]; and implement the selector as

-(void)buttonClick{
UIViewController *menu = [[UIViewController alloc] init];
[self.navigationController pushViewController:menu animated:YES];
}

Answer 1

Add this in the app delegate for the root view controller:

FirstViewController *firstViewController = [[FirstViewController alloc] initWithNibName:@"view name" bundle:nil]; 
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:firstViewController];
self.window.rootViewController = navigationController; 

Inside the button click:

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

Answer 2

you have to set UINavigationController as Window.rootViewController like below.

FirstViewController *viewController = [[FirstViewController alloc] initWithNibName:@"FirstViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navigationController;

Answer 3

You should subclass UIViewController and implement the view however you want. Views can be built programmatically or in interface builder.

Then you would either use segues, storyboard identifiers, or a xib file to load the view.

Might look like this: (assuming you set up the view controllers in a storyboard and connected them with appropriate segues & the identifier below)

-(void)buttonClick{
    [self performSegueWithIdentifier:@"MySegueIdentifier"];
}

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString: @"MySegueIdentifier"]) {
        MyCustomViewController* vc = (MyCustomViewController*)[segue destinationViewController];
        //do something with your view controller, like set a property
    }
}

Or maybe like this

-(void) buttonClick {
    MyCustomViewController* vc = (MyCustomViewController*)[[UIStoryboard storyboardWithName: @"MyStoryboard"] instantiateViewControllerWithIdentifier: @"MyStoryboardIdentifier"];
    [self.navigationController pushViewController: vc animated: YES]; //assuming current view controller is a navigation stack. Or could also do presentViewController:animated:
}

You would add a class subclassing UIViewController to your project, and import it (#import "MyCustomViewController.h" in the .m file of the view controller you're pushing from).

Could also use a xib file, but I won't bother with those since Storyboards are much easier to work with.

Without a storyboard: Inside the app delegate:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    navigationController = [[UINavigationController alloc] init]; //navigation controller is a property on the app delegate
    // Override point for customization after application launch.
    FirstViewController *firstViewController = [[FirstViewController alloc] init];
    [navigationController pushViewController: firstViewController animated:NO];
    [window addSubview:navigationController.view];
    [window makeKeyAndVisible];

    return YES;
}

Inside your FirstViewController:

-(void) buttonClick {
    MyCustomViewController* vc = [[MyCustomViewController alloc] init]; // or maybe you have a custom init method
    [self.navigationController pushViewController: vc animated: YES];
}

Answer 4

Very simple:

-(void)ButtonClickActionMethod
{
    [button addTarget:select action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
}

Clicked Action:

-(void)buttonClick{
    YourViewController *view = [[YourViewController alloc] initWithNibName:@"YourViewController" bundle:nil];
    [self.navigationController pushViewController:view animated:YES];
}