通过懒加载创建LocationManager:
// 懒加载

• (CLLocationManager *)locationManager
  {
  if (_locationManager == nil) {
  // 创建
  _locationManager = [[CLLocationManager alloc] init];
  // 设置代理
  _locationManager.delegate = self;
  // 每隔多少M 定位一次
  // _locationManager.distanceFilter = 100;

    /**
     kCLLocationAccuracyBestForNavigation // 最适合导航
     kCLLocationAccuracyBest; // 最好的
     kCLLocationAccuracyNearestTenMeters; // 10m
     kCLLocationAccuracyHundredMeters; // 100m
     kCLLocationAccuracyKilometer; // 1000m
     kCLLocationAccuracyThreeKilometers; // 3000m
     */
    // 精度越高越耗电
    _locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    // 当使用的时候
    [_locationManager requestWhenInUseAuthorization];
    // 一直使用
  

// [_locationManager requestAlwaysAuthorization];

}
return _locationManager;

}

locationManager的代理方法
// 获取地理位置

• (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation > )locations
  {
  NSLog(@"定位到了");
  NSLog(@"%@",locations.lastObject);
  /
  • CLLocation 详解
  • coordinate : 经纬度
  • altitude : 海拔
  • course : 航向
  • speed ; 速度
    */
    CLLocation *location = locations.lastObject;

// CLLocation *locationNew = [CLLocation alloc] initWithLatitude: longitude:<#(CLLocationDegrees)#>
[self.geocoder reverseGeocodeLocation:locations.lastObject completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {

    CLPlacemark *placemark = placemarks.firstObject;
    NSLog(@"%@",placemark.addressDictionary);
    self.cityLabel.text = placemark.addressDictionary[@"City"];
    self.streetLabel.text = placemark.addressDictionary[@"Street"];
    self.guizhidaoLabel.text = placemark.addressDictionary[@"Name"];
}];

}
// 授权发生改变时会调用

• (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status
  {
  switch (status) {
  // 用户还未决定
  case kCLAuthorizationStatusNotDetermined:
  {
  NSLog(@"用户还未决定");
  break;
  }
  // 访问受限
  case kCLAuthorizationStatusRestricted:
  {
  NSLog(@"访问受限");
  break;
  }
  // 定位关闭时和对此APP授权为never时调用
  case kCLAuthorizationStatusDenied:
  {
  // 定位是否可用（是否支持定位或者定位是否开启）
  if([CLLocationManager locationServicesEnabled])
  {
  NSLog(@"定位开启，但被拒");
  }else
  {
  NSLog(@"定位关闭，不可用");
  }
  // NSLog(@"被拒");
  break;
  }
  // 获取前后台定位授权
  case kCLAuthorizationStatusAuthorizedAlways:
  // case kCLAuthorizationStatusAuthorized: // 失效，不建议使用
  {
  NSLog(@"获取前后台定位授权");
  break;
  }
  // 获得前台定位授权
  case kCLAuthorizationStatusAuthorizedWhenInUse:
  {
  NSLog(@"获得前台定位授权");
  break;
  }
  default:
  break;
  }

}

pragma mark 根据地名确定地理坐标

-(void)getCoordinateByAddress:(NSString *)address{
//地理编码
[_geocoder geocodeAddressString:address completionHandler:^(NSArray *placemarks, NSError *error) {
//取得第一个地标，地标中存储了详细的地址信息，注意：一个地名可能搜索出多个地址
CLPlacemark *placemark=[placemarks firstObject];

    CLLocation *location=placemark.location;//位置
    CLRegion *region=placemark.region;//区域
    NSDictionary *addressDic= placemark.addressDictionary;//详细地址信息字典,包含以下部分信息

// NSString *name=placemark.name;//地名
// NSString *thoroughfare=placemark.thoroughfare;//街道
// NSString *subThoroughfare=placemark.subThoroughfare; //街道相关信息，例如门牌等
// NSString *locality=placemark.locality; // 城市
// NSString *subLocality=placemark.subLocality; // 城市相关信息，例如标志性建筑
// NSString *administrativeArea=placemark.administrativeArea; // 州
// NSString *subAdministrativeArea=placemark.subAdministrativeArea; //其他行政区域信息
// NSString *postalCode=placemark.postalCode; //邮编
// NSString *ISOcountryCode=placemark.ISOcountryCode; //国家编码
// NSString *country=placemark.country; //国家
// NSString *inlandWater=placemark.inlandWater; //水源、湖泊
// NSString *ocean=placemark.ocean; // 海洋
// NSArray *areasOfInterest=placemark.areasOfInterest; //关联的或利益相关的地标
NSLog(@"位置:%@,区域:%@,详细信息:%@",location,region,addressDic);
}];
}

pragma mark 根据坐标取得地名

-(void)getAddressByLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude{
//反地理编码
CLLocation *location=[[CLLocation alloc]initWithLatitude:latitude longitude:longitude];
[_geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *placemark=[placemarks firstObject];
NSLog(@"详细信息:%@",placemark.addressDictionary);
}];
}