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Thomas Nilsen
14,957 Pointscall CLLoationManager and it's delegates from a model
I'm trying to put everything location related inside a model. When I call this my MainViewController, the simulator doesn't ask me to my your location, and nothing happens.
When I use the same code from my model, but put it directly in ViewDidLoad in my ViewController, everything works. I'm having a hard time understanding why.
Here is my model:
@implementation Location
{
CLLocationManager *_locationManager;
CLLocation *_location;
}
- (void)startLocationManager
{
NSLog(@"In startLocationManager");
_locationManager = [[CLLocationManager alloc] init];
_locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
_locationManager.delegate = self;
[_locationManager startUpdatingLocation];
}
#pragma mark - LocationManager Delegates
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
NSLog(@"In didUpdateLocations");
if (locations) {
_location = [locations lastObject];
NSLog(@"%@", _location);
}
}
@end
I call this in my MainViewController like this:
- (void)viewDidLoad
{
[super viewDidLoad];
Location *location = [[Location alloc] init];
[location startLocationManager];
}
Why does the code work like a charm directly in the viewController, but not through my model? Amit Bijlani and Ben Jakuben I'd love an expert opinion
2 Answers
Amit Bijlani
Treehouse Guest TeacherYou need to make location a property of your view controller instead of a local variable in the viewDidLoad. Otherwise it is created and deallocated within that method. You need it to live through the lifecycle of your view controller.
Ben Jakuben
Treehouse TeacherSeems like it should work on the surface. With viewDidLoad as you've shown it here, do you get your "In startLocationManager" message in the log?
Thomas Nilsen
14,957 PointsYes I do, but that's the only one
Thomas Nilsen
14,957 PointsThis was a shorter version of a question of mine when I was debugging the code. Now that this is solved I'm still having issues with this: https://teamtreehouse.com/forum/using-delegates-in-models-to-pass-information-between-them
Thomas Nilsen
14,957 PointsNever mind :) Figured that one out ;)
Thomas Nilsen
14,957 PointsThomas Nilsen
14,957 PointsBrilliant - That was it. Thank you!