CODEWITHSUNDEEP
iosobjective-c
DontMind
DontMind

Reputation: 99

Access a Views Subviews from ViewController

I have a ViewController and a View in separate files. In the ViewController I add the View like this:

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

        mainView = [[MainView alloc] init];
        [self setView: mainView];

    }
    return self;
}

In that mainView there is a label, added as SubView. I would like to change the labels text from my controller. How would I do that?

I can't figure out how to access the label from the controller.

Upvotes: 1

Views: 1172

Answers (3)

Mischa
Mischa

Reputation: 17231

If mainView has only the label as a subview and no other subviews you can easily access the label with

UILabel *label = (UILabel *)[mainView.subviews objectAtIndex:0];

and then set its text like this:

label.text = @"your text";

That is the "quick and dirty" way.

A much better solution is to create a property in your ViewControllerfor each subview that you want to modify. CTRL+drag the label to your ViewController.h file and Xcode should automatically add the line

@property (strong, nonatomic) IBOutlet UILabel *label;

Then you can easily access the label from anywhere in your ViewController with

label.text = @"your text";

Upvotes: 0

msk
msk

Reputation: 8905

Another method.

In MainView.m tag your label where you are creating it

yourLabel.tag = 'urlb'

In your ViewController

UILabel *lbl = (UILabel *)[mainView viewWithTag:'urlb'];
[lbl setText: @"what is the problem"];

Upvotes: 0

Alexander Ney
Alexander Ney

Reputation: 781

The label needs to be exposed in the MainView as e.g. a property.

Then you can access that property like:

[[(MainView *)[self view] labelProperty] setText: @"foo"];

Or more readable:

MainView *mainView = (MainView *)self.view;
mainView.labelProperty.text = @"foo";

Upvotes: 1

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