Question

我想将用户的位置方法与LocationUtils分开，以便我可以使用它们并且不必继续编写重复的方法，但我正在努力做到这一点，是否有我可以学习的资源？我是iOS的新手。

class LocationUtils: NSObject, CLLocationManagerDelegate {
  let locationManager = CLLocationManager()
  var userCity: String?

  func enableLocationServices() {
    self.locationManager.requestAlwaysAuthorization()

    if CLLocationManager.locationServicesEnabled() {
      locationManager.delegate = self // Comment
      locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
      locationManager.startUpdatingLocation()
    }
    self.locationManager.requestLocation()
  }


  // Try ro call this statically
  func getUsersClosestCity(lat: CLLocationDegrees, lng: CLLocationDegrees){
    let geoCoder = CLGeocoder()
    let location = CLLocation(latitude: lat, longitude: lng)
    geoCoder.reverseGeocodeLocation(location) {
      (placemarks, error) -> Void in

      let placeArray = placemarks as [CLPlacemark]!
      var placeMark: CLPlacemark!
      // Can the array throw an exception
      placeMark = placeArray?[0]
      if (placeMark != nil) {
       //userCity = placeMark.addressDictionary?["City"] as? String?
        self.userCity = placeMark.addressDictionary?["City"] as? String

      }

    }

  }
  func getUserCity() -> String? {
    return self.userCity
  }

  func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let locValue:CLLocationCoordinate2D = manager.location!.coordinate
    self.getUsersClosestCity(lat: locValue.latitude, lng: locValue.longitude)
  }

}

现在我想在项目的各个类中使用这些方法

这就是我使用它的方式

override func loadView() {
    super.loadView()
    setLocationView()

  }





 func setLocationView() {
    let locationLabel : UILabel = UILabel(frame: CGRect(x: UIScreen.main.bounds.width/3, y: UIScreen.main.bounds.height, width: 500, height: 21))
    let locationLabelFrame = CGRect(x : UIScreen.main.bounds.width/4, y: 3 * (UIScreen.main.bounds.width/4), width : 125, height : 45)
    locationLabel.frame = locationLabelFrame
    locationLabel.backgroundColor = UIColor.blue
    let locUtil = LocationUtils()
    locUtil.enableLocationServices()
    if (locUtil.getUserCity() != nil) {
      locationLabel.text = locUtil.getUserCity()
    }

    self.view.addSubview(locationLabel)
  }

这不会将UILabel添加到视图中，当我删除与位置相关的调用时，我在视图上获得了一个标签

如果有人能指导我可以学习的资源或任何有关如何做的提示，我将不胜感激

谢谢

Answer 1

您可以创建一个可供所有viewControllers使用的单件位置服务：

class LocationReportingService {
    static let shared = LocationReportingService()
    fileprivate let locationManager = CLLocationManager()
    private override init() {
        super.init()
    }
    func beginMonitoring() {
        //insert logic here
    }
}

要使用它，请调用LocationReportingService.shared.beginMonitoring（）。您可以为las知道位置添加属性，也可以使用NotificationCenter.default.post广播您的其他视图控制器可以监听的事件。

如何静态获取用户位置并在iOS其他类中使用它？

1 个答案: