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
...
-(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.
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]];
}