How to update a UILabel in Xcode programmatically without XIB files?

I’m stuck 🙁
In my application I require an update from CLLocationManager every time it gets an update to a new position. I am not using XIB/NIB files, everything I coded I have done programmatically. To the code:
the .h


@interface TestViewController : UIViewController
    UILabel* theLabel;

@property (nonatomic, copy) UILabel* theLabel;

@end

the .m

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  • 
    ...
    
    -(void)loadView{
        ....
        UILabel* theLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0,0.0,320.0,20.0)];
        theLabel.text = @"this is some text";
    
        [self.view addSubView:theLabel];
        [theLabel release]; // even if this gets moved to the dealloc method, it changes nothing...
    }
    
    - (void)locationManager:(CLLocationManager *)manager
        didUpdateToLocation:(CLLocation *)newLocation
               fromLocation:(CLLocation *)oldLocation
    {
        NSLog(@"Location: %@", [newLocation description]);
    
        // THIS DOES NOTHING TO CHANGE TEXT FOR ME... HELP??
        [self.view.theLabel setText:[NSString stringWithFormat: @"Your Location is: %@", [newLocation description]]];
    
        // THIS DOES NOTHING EITHER ?!?!?!?
        self.view.theLabel.text = [NSString stringWithFormat: @"Your Location is: %@", [newLocation description]];
    
    }
    ...
    

    Any ideas, or help?

    (this was all hand jammed so please forgive me if it looks kinda gacked) I can provide more info if needed.

    2 Solutions Collect From Internet About “How to update a UILabel in Xcode programmatically without XIB files?”

    Your loadView method is wrong. You do not set the instance variable properly but instead you generate a new local variable. Change it to the following by omitting the UILabel * and do not release it because you want to keep a reference around to the label to set the text later.

    -(void)loadView{
        ....
        theLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0,0.0,320.0,20.0)];
        theLabel.text = @"this is some text";
    
        [self.view addSubView:theLabel];
    }
    
    - (void) dealloc {
        [theLabel release];
        [super dealloc];
    }
    

    Then later directly access the variable like this:

     - (void)locationManager:(CLLocationManager *)manager
         didUpdateToLocation:(CLLocation *)newLocation
                fromLocation:(CLLocation *)oldLocation
     {
         NSLog(@"Location: %@", [newLocation description]);
    
         theLabel.text = [NSString stringWithFormat: @"Your Location is: %@", [newLocation description]];
    
     }
    

    Are you synthesizing theLabel in your .m file…? If not, you need to, I believe.