CoreLocation manager not updating locations - ios

Question

I was trying to implement a separate class for managing my location. I wanted to get my location whenever I click a button.
gpsFilter.h
#import <Foundation/Foundation.h>
#import <CoreLocation/CoreLocation.h>
#interface gpsFilter : NSObject <CLLocationManagerDelegate>
#property (nonatomic, retain) CLLocationManager *gpsManager;
#property (nonatomic, retain) NSString * latitude;
#property (nonatomic, retain) NSString * longitude;
#end
gpsFilter.m.
#import "gpsFilter.h"
#implementation gpsFilter
- (id) init{
self = [super init];
if(self != nil){
self.gpsManager = [[CLLocationManager alloc] init];
self.gpsManager.delegate = self;
[self.gpsManager startUpdatingLocation];
BOOL enable = [CLLocationManager locationServicesEnabled];
NSLog(#"%#", enable? #"Enabled" : #"Not Enabled");
}
return self;
}
- (void)gpsManager:(CLLocationManager *) manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
NSLog(#"didUpdateToLocation: %#", newLocation);
CLLocation *currentLocation = newLocation;
if(currentLocation != nil){
self.latitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.longitude];
self.longitude = [NSString stringWithFormat:#"%.8f", currentLocation.coordinate.latitude];
}
}
- (void)gpsManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(#"didFailWithError: %#", error);
}
#end
I am using a separate class because I wanted to add smoothing filter in the future. I don't get any updates. The NSLog is never triggered. I think some variable is getting autoreleased, but I am not sure, which one.
The viewController code is as follows.
#import "gpstestViewController.h"
#interface gpstestViewController (){
}
#end
#implementation gpstestViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.location = [[gpsFilter alloc] init];
// Do any additional setup after loading the view, typically from a nib.
}
- (IBAction)getloca:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];
}
- (IBAction)getLocation:(id)sender {
self.latitudeLabel.text = [self.location latitude];
self.longitudeLabel.text = [self.location longitude];
}
#end
I am sorry that I am dumping a lot of code, but I am a newbie to ios programming and I am not able to find what the problem is.
EDIT: The updateLocation delegate method is not being called at all.

Answer 1

The delegate methods must be named locationManager:didUpdateToLocation:fromLocation: and locationManager:didFailWithError:.
You cannot use custom method names like gpsManager:didUpdateToLocation:fromLocation:.
Also note that locationManager:didUpdateToLocation:fromLocation: is deprecated as of iOS 6 and you should use locationManager:didUpdateLocations:.

Answer 2

The signature of your didUpdateToLocation is wrong:
This is my code:
/** Delegate method from the CLLocationManagerDelegate protocol. */
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
// here do
}
Further set the desiredAccuracy to CLLocationAccuracyBest.