如何在iOS应用中每n分钟更新一次后台位置

Question

我很欣赏这个问题似乎已经在这里得到了回答:如何在iOS应用中每n分钟更新一次后台位置?

然而，虽然解决方案是暗示的，我真的很感激如果有人可以张贴一些示例代码，这是如何实际工作的

许多谢谢,

杰克

Answer 1

您需要在应用程序启动时订阅核心位置。

像这样的

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

和添加委托

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

Answer 2

试试这个，你会得到纬度和经度更新…在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];
  }