import <CoreLocation/CoreLocation.h>

把CLLocationManager设置为属性。
这里有一个坑点，如果不设置为属性，软件开启时提示定位的提示出现一瞬间就消失了。

@interface HomeViewController ()<CLLocationManagerDelegate>
@property (nonatomic, strong) CLLocationManager *locationManager;

pragma mark - 开始定位

• (void)startLocation {
  if ([CLLocationManager locationServicesEnabled]) {
  // CLog(@"--------开始定位");
  self.locationManager = [[CLLocationManager alloc]init];
  self.locationManager.delegate = self;
  //控制定位精度,越高耗电量越
  self.locationManager.desiredAccuracy = kCLLocationAccuracyKilometer;
  // 总是授权
  [self.locationManager requestAlwaysAuthorization];
  self.locationManager.distanceFilter = 10.0f;
  [self.locationManager requestAlwaysAuthorization];
  [self.locationManager startUpdatingLocation];
  }
  }

• (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error {
  if ([error code] == kCLErrorDenied) {

    [JKProgressHUD showErrorWithStatus:@"访问被拒绝"];
  

  }
  if ([error code] == kCLErrorLocationUnknown) {

    [JKProgressHUD showErrorWithStatus:@"无法获取位置信息"];
  

  }
  }

pragma mark - 定位代理 经纬度回调

• (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations {
  CLLocation *newLocation = locations[0];

  // 获取当前所在的城市名
  CLGeocoder *geocoder = [[CLGeocoder alloc] init];
  //根据经纬度反向地理编译出地址信息
  [geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *array, NSError *error){
  if (array.count > 0){
  CLPlacemark *placemark = [array objectAtIndex:0];

        //获取城市
        NSString *city = placemark.locality;
        if (!city) {
            //四大直辖市的城市信息无法通过locality获得，只能通过获取省份的方法来获得（如果city为空，则可知为直辖市）
            city = placemark.administrativeArea;
        }
        //获取街道
        NSString * thoroughfare = placemark.thoroughfare;
        
        NSString * location = [NSString stringWithFormat:@"%@%@",city,thoroughfare];
        
        NSLog(@"当前位置 ：%@",location);
  

// [self httpGetWeather:city];
}
else if (error == nil && [array count] == 0)
{
NSLog(@"No results were returned.");
}
else if (error != nil)
{
NSLog(@"An error occurred = %@", error);
}
}];
//系统会一直更新数据，直到选择停止更新，因为我们只需要获得一次经纬度即可，所以获取之后就停止更新
[manager stopUpdatingLocation];

}