IOS Open New View controller Programatially

Question

I need to open a registration form on my application programatically, the view controller is created on storyborad with storybpard ID ViewControllerRegister and the code I have used to open the form is

RegistrationFormViewController *registerView = [self.storyboard instantiateViewControllerWithIdentifier:@"ViewControllerRegister"];
          [self presentViewController:registerView animated:NO completion:nil];

But when I run the application, I am getting the error like,

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[__NSArrayM insertObject:atIndex:]: object cannot be nil' * First throw call stack:

no problem not in RegistrationFormViewController here , check after the present you were add some nil value to your array , that the error — Anbu.Karthik
– Anbu.Karthik, Commented Feb 8, 2016 at 11:16

Badal Shah · Accepted Answer · 2016-02-08 11:18:08Z

1

1) Make sure about your storyboardname is "Main" or different.

2) Check you have entered proper storyboard identifier.

and Finally,

3) Sometimes Xcode can't able to find storyboard with self.storyboard. Try to mention storyboard with actual name like,

UIStoryboard *storyBoard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];

        RegistrationFormViewController *registrationFormViewController = [storyBoard instantiateViewControllerWithIdentifier:@"RegistrationFormViewController"];
        [self presentViewController:registrationFormViewController animated:YES completion:nil];

answered Feb 8, 2016 at 11:18

Badal Shah

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4 Comments

Haris Over a year ago

Basically my application is slider menu with navigation view controller. I need to pop the registration form if the device not registered on when the application launches. And I have put the above below - (void)viewWillAppear:(BOOL)animated { [super viewWillAppear:animated];

Badal Shah Over a year ago

Do you have any demo for that ?

Haris Over a year ago

I am following the tutorial here archetapp.com/2014/07/14/…

Badal Shah Over a year ago

I need to show your code. I can't understand your scenario. You are trying it from side menu or simple your viewcontroller ? and what you want to do ? pop or present ?

Anbu.Karthik · Accepted Answer · 2016-02-08 11:18:37Z

1

[__NSArrayM insertObject:atIndex:]: object cannot be nil, the error says Look in your code for any lines that say "insertObject:atIndex:". The object you're inserting is apparently nil.

Make sure you have initialized your array called XXXX before adding any object into it...

NSMutableArray *xxx=[[NSMutableArray alloc]init];

and stop adding any nil object into it...

if(str) //or if(str != nil) or if(str.length>0)
{
//add the str into xxx array.
}
else
{
 //add the empty value to your xxx array
}

answered Feb 8, 2016 at 11:18

Anbu.Karthik

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Comments

Umair Aamir · Accepted Answer · 2016-02-09 05:17:01Z

1

There is no problem in your code for loading a view controller programmatically. You must check with breakpoint that either your viewDidLoad method is being called in your opening controller or not. If it is being called then everything is fine and you need to check what you are doing in your opening controller's life cycle methods.

answered Feb 9, 2016 at 5:17

Umair Aamir

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1 Comment

Haris Over a year ago

Thanks for the response, I will cross check it.

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