[ios] iOS: present view controller programmatically

I'm using the presentViewController:animated:completion: method to go to another view controller.

This is my code:

AddTaskViewController *add = [[AddTaskViewController alloc] init];
[self presentViewController:add animated:YES completion:nil];

This code goes to the other UIViewController but the other controller is empty. I've always been using storyboards but now I need this to be done in code.

LandingScreenViewController *nextView=[self.storyboard instantiateViewControllerWithIdentifier:@"nextView"];
[self presentViewController:nextView animated:YES completion:^{}];

your code :

 AddTaskViewController *add = [[AddTaskViewController alloc] init];
 [self presentViewController:add animated:YES completion:nil];

this code can goes to the other controller , but you get a new viewController , not the controller of your storyboard, you can do like this :

AddTaskViewController *add = [self.storyboard instantiateViewControllerWithIdentifier:@"YourStoryboardID"];
[self presentViewController:add animated:YES completion:nil];

If you are using Storyboard and your "add" viewController is in storyboard then set an identifier for your "add" viewcontroller in settings so you can do something like this:

UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"NameOfYourStoryBoard" 
                                                     bundle:nil];
AddTaskViewController *add = 
           [storyboard instantiateViewControllerWithIdentifier:@"viewControllerIdentifier"];

[self presentViewController:add 
                   animated:YES 
                 completion:nil];

if you do not have your "add" viewController in storyboard or a nib file and want to create the whole thing programmaticaly then appDocs says:

If you cannot define your views in a storyboard or a nib file, override the loadView method to manually instantiate a view hierarchy and assign it to the view property.

Here is how you can do it in Swift:

let vc = UIViewController()
self.presentViewController(vc, animated: true, completion: nil)

Try this code:

[self.navigationController presentViewController:controller animated:YES completion:nil];

The best way is

AddTaskViewController * add = [self.storyboard instantiateViewControllerWithIdentifier:@"addID"];
[self presentViewController:add animated:YES completion:nil];

You need to set storyboard Id from storyboard identity inspector

 AddTaskViewController *add=[self.storyboard instantiateViewControllerWithIdentifier:@"storyboard_id"];
 [self presentViewController:add animated:YES completion:nil];

Try the following:

NextViewController *nextView = [self.storyboard instantiateViewControllerWithIdentifier:@"nextView"];
[self presentViewController:nextView animated:YES completion:NULL];