CLLocationManager* _locationManager = [[CLLocationManager alloc] init];
  _locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
  if ([[UIDevice currentDevice].systemVersion floatValue] >= 8) {
    //由于IOS8中定位的授权机制改变 需要进行手动授权
    //获取授权认证
    [_locationManager requestWhenInUseAuthorization];
  }
  [_locationManager startUpdatingLocation];

@property (strong, nonatomic) CLLocationManager* locationManager;

  self.locationManager = [[CLLocationManager alloc] init];
  _locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
  if ([[UIDevice currentDevice].systemVersion floatValue] >= 8) {
    //由于IOS8中定位的授权机制改变 需要进行手动授权
    //获取授权认证
    [_locationManager requestWhenInUseAuthorization];
  }
  [_locationManager startUpdatingLocation];