How do i get segue.destinationViewController isKindOfClass: x, to recognize the destination class?

Question

I'm trying to get a simple NSLog message if the destinationviewcontroller isKindOfClass like this:

FirstViewController.m

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.destinationViewController isKindOfClass:[SecondViewController class]]) {

        NSLog(@"The destinationViewController isKindOfClass SecondViewController");
}

Within the storyboard i have ctrl+dragged from a bar button item in the FirstViewController to the SecondViewController and chosen modal segue. I've also made sure to #import the SecondViewController.h in FirstViewContrller.m and i have given the SecondViewController the "custom class" of SecondViewController in the identity inspector.

Do i need to add/do something else, because I'm not getting the NSLog message at this point.

Edit: I forgot to inform that i did in fact embed the secondViewController in a navigationViewController.

Try logging destinationViewController - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender { NSLog(@“%@“,segue.destinationViewController ); } — Rajesh, Aug 13 '14 at 10:05
Hm, does one really know the class of the destination segue controller at that point at all? Isn't that per se a NSViewController and usually is cast to the actual controller? — Volker, Aug 13 '14 at 10:08
Are you sure you weren't embed your ViewController in Navigation controller? — Szu, Aug 13 '14 at 10:12
@Szu You are right! I did embed it in a navigation controller. Guessing that's why it won't work then? But why? — XT_Nova, Aug 13 '14 at 10:19

Szu · Accepted Answer · 2014-08-13T10:34:54.093

1

This should work for you:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    UINavigationController *navigationController = segue.destionationViewController;

    if ([navigationController.viewControllers[0] isKindOfClass:[SecondViewController class]]) {

        NSLog(@"The destinationViewController isKindOfClass SecondViewController");
}

But if you want something more generic I would do:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    id dvc = segue.destinationViewController;
    if ([dvc isKindOfClass:[UINavigationController class]] && ((UINavigationController *)dvc).viewControllers > 0) {
        dvc = [[dvc viewControllers] firstObject];
    }

    NSLog(@"The destinationViewController is: %@", NSStringFromClass([dvc class]));
}

edited Aug 13 '14 at 10:34

answered Aug 13 '14 at 10:24

Szu

2,254
1
21
37

Since i had my view controller embedded in an Navigation Controller, this works like a charm. I tried my code without embedding the view controller in an navigation controller and then the NSLog message got through. Thank you Szu. – XT_Nova Aug 13 '14 at 10:34
@getJETsetTER Please look at my updated answer it might be interesting for you. – Szu Aug 13 '14 at 10:35

score 0 · Answer 2 · edited Aug 13 '14 at 11:48

0

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
{  
    HomeViewController *edit=[segue destinationViewController];  
    if ([HomeViewController.viewControllers[0] isKindOfClass:[CheckViewController class]])       
    {

             //You are ready for coding here

    }

}

Try this code. This might help.

edited Aug 13 '14 at 11:48

Dhrumil

3,221
6
21
34

answered Aug 13 '14 at 11:37

Monikanta

307
2
8

Husrat Mehmood · Answer 3 · 2014-08-13T12:09:50.177

First you would have to set destinationViewController

 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender 
       {

             if([segue.identifier isEqualToString:@"YourSegueIdentifierHere"] )
             {
                  //Now you can assign here the destinationViewController
                SecondViewController *secondController = [segue  destinationViewController];

                   //now you don't need this but if you want you can
                  if([segue.destinationViewController isKindOfClass:[SecondViewController class]])

                  {
                         NSLog(@"The destinationViewController isKindOfClass SecondViewController");
                  }




             }

}

You can use [segue.destinationViewController isKindOfClass:[SecondViewController class]]

inside the if statement if you want.But its not needed now you can get the Identifier from your xcode.

You shouldn't compare strings using == operator. Please look at: http://stackoverflow.com/questions/3703554/understanding-nsstring-comparison — Szu, Aug 13 '14 at 11:02

How do i get segue.destinationViewController isKindOfClass: x, to recognize the destination class?

3 Answers3