如何在iOS应用中每n分钟获取一次后台位置更新？

Question

I appreciate that this question already appears to have been answered here: How do I get a background location update every n minutes in my iOS application?

However, although the solution is hinted at, I'd be really grateful if someone could post some sample code as to how this actually works.

Many thanks,

Jack

Answer 1

You need to subscribe to core location during application start.

some thing like this

CLLocationManager *locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self; 
locationManager.desiredAccuracy = kCLLocationAccuracyThreeKilometers;

and add delegate

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation

Answer 2

Try this one you will get the lattitude and longitude updated..in didUpdateToLocation...

//in view did load 

locationManager = [[CLLocationManager alloc]init];
    if([CLLocationManager locationServicesEnabled])
    {
        locationManager.delegate = self;
        locationManager.desiredAccuracy  = kCLLocationAccuracyKilometer;
        locationManager.distanceFilter = 1000.0f;
        [locationManager startUpdatingLocation];
        }


- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
appDelegateObj.latitude= [[NSString alloc]initWithFormat:@"%g",newLocation.coordinate.latitude];
    appDelegateObj.longitude = [[NSString alloc]initWithFormat:@"%g",newLocation.coordinate.longitude];
  }