Transfer variable between viewcontrollers

Question

I have a problem with my iOS App Project. I want to transfer a value of my SearchViewController to my ResultGeneralInfoViewController. There are no bugs or issues but it doesn't work.

Here my Code in my SearchViewController.m

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    NSDictionary *item = [searchResults objectAtIndex:[indexPath row]];


    ResultGeneralInfosViewController *detailViewController = [ResultGeneralInfosViewController alloc];
    detailViewController.companyName = [item objectForKey:@"companyName"];
    NSLog([item objectForKey:@"companyName"]);
}

ResultGeneralInfoViewController.h

@interface ResultGeneralInfosViewController : UIViewController {

    NSString *companyName;
}

@property NSString *companyName;

@property (weak, nonatomic) IBOutlet UILabel *companyNameLabel;

and ResultGeneralInfoViewController.m

@implementation ResultGeneralInfosViewController

@synthesize companyName;

//Outlets
@synthesize companyNameLabel;


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {

    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    companyNameLabel.text = self.companyName;
}

Any ideas?

*"There are no bugs but it doesn't work"* seems like a contradiction in terms to me :-) — Martin R, Apr 06 '13 at 16:29

score 4 · Accepted Answer · answered Apr 06 '13 at 16:17

4

You have not initialized your ResultGeneralInfosViewController, only allocated it. Call the appropriate init method in order to initialize it first. For example:

ResultGeneralInfosViewController *detailViewController =
    [[ResultGeneralInfosViewController alloc] initWithNibName:@"NibName" bundle:nil];

Make sure you set the property once the object has been initialized.

answered Apr 06 '13 at 16:17

Yes, that is also true! – Martin R Apr 06 '13 at 16:18
I added your code to my SearchViewController.m but the result remains the same :( What is my NibName? – DerFuchs10 Apr 07 '13 at 13:12
NibName is the name of the nib file associated with the view controller, if you have one. – Apr 07 '13 at 14:07
So when I use Storyboards its nil? – DerFuchs10 Apr 07 '13 at 14:32

score 1 · Answer 2 · answered Apr 06 '13 at 16:17

1

In didSelectRowAtIndexPath, you create an instance of ResultGeneralInfosViewController, but you do nothing with it. If you use a navigation controller, then you should add

[self.navigationController pushViewController:detailViewController animated:YES];

answered Apr 06 '13 at 16:17

Martin R

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Transfer variable between viewcontrollers

2 Answers2