iOS Swift 3：位置隐私被拒绝

2019年7月20日 241次阅读

如果应用程序的隐私访问位置被拒绝怎么办？

晚上伙计们,我正在编写一个在使用时使用位置的简单应用程序.

设计模式

>在所有内容之前,当您启动应用程序时,它将检查是否已设置权限.

>如果不是,则显示要求许可的警报.
>如果是并且被授予,它将继续完成其工作.
>如果是并拒绝,则会显示一条警报,要求使用指向设置的按钮授予访问权限.

>应该可以从设置返回到应用程序.

>应用程序完成其工作.
>如果用户在应用程序仍处于打开状态时更改隐私设置,则应通知应用程序,并重复编号1.

守则到目前为止

MainController

let manager = LocationManager()

override func viewDidLoad() {
        super.viewDidLoad()
        // ...

        if manager.getPermission() == false {
          //show alert
          showAcessDeniedAlert()
        }
        manager.onLocationFix = { 
          //This is a function used for a closure
        }

    }
}
func showAcessDeniedAlert() {
    let alertController = UIAlertController(title: "Location Accees Requested",
                                                message: "The location permission was not authorized. Please enable it in Settings to continue.",
                                                preferredStyle: .alert)

    let settingsAction = UIAlertAction(title: "Settings", style: .default) { (alertAction) in

        // THIS IS WHERE THE MAGIC HAPPENS!!!!
        if let appSettings = URL(string: UIApplicationOpenSettingsURLString) {
            UIApplication.shared.open(appSettings as URL)
        }
    }
    alertController.addAction(settingsAction)

    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
    alertController.addAction(cancelAction)

    present(alertController, animated: true, completion: nil)
}

的LocationManager

import CoreLocation

extension Coordinate {
    init(location: CLLocation) {
        latitude = location.coordinate.latitude
        longitude = location.coordinate.longitude
    }
}

final class LocationManager: NSObject, CLLocationManagerDelegate {
    let manager = CLLocationManager()

    var onLocationFix: ((Coordinate) -> Void)?

    override init() {
        super.init()
        manager.delegate = self
        manager.requestLocation()
    }

  func getPermission() -> Bool {
      switch CLLocationManager.authorizationStatus() {
      case .authorizedAlways:
            return true
      case .authorizedWhenInUse:
            return true
      case .denied:
            return false
      case .restricted:
            return false
      case .notDetermined:
            manager.requestWhenInUseAuthorization()
            return getPermission()
      }
  }



    //MARK: CLLocationManagerDelegate
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        if status == .authorizedWhenInUse {
            manager.requestLocation()
        }
    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        print(error.localizedDescription)
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        guard let location = locations.first else { return }

        let coordinate = Coordinate(location: location)
        if let onLocationFix = onLocationFix {
            onLocationFix(coordinate)
        }

    }
}

我怎么能够？

>如果隐私被拒绝,我该如何显示AlertController？

使用此设置我遇到此错误：警告：尝试呈现< UIAlertController：0x145ae7ee0> on< xxx.xxController：0x143e04720>其视图不在窗口层次结构中！
>如何编写指向设置的设置按钮？
>我如何编码：“从设置页面,我可以返回应用程序”？

最佳答案 >首次访问self.view属性后调用viewDidLoad.这意味着在窗口层次结构上添加此self.view之后,首先称为viewDidLoad.将检查代码移动到viewDidAppear(_ :)函数并确保显示视图控制器.

>打开设置应用程序的代码似乎没问题,但不要忘记检查它可用的系统版本.

>当您的应用处于后台状态时,您的应用无法以某种方式与其他应用互动.

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