Question

当我通过xcode在设备上安装iOS应用并且关闭位置服务时，requestAlwaysAuthorization（）第一次显示“打开位置服务”，该按钮将用户推送到设备设置以打开位置服务，然后用户返回应用程序，并且会看到“权限”警报（始终使用三个选项，使用时从不使用）。如果用户点击始终选项，然后完全关闭应用程序并关闭位置服务，然后再次打开应用程序，则不会显示“打开位置服务”警报。这是我的代码：

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager = CLLocationManager()
    NotificationCenter.default.addObserver(self, selector: #selector(checkLocationService), name: Notification.Name.UIApplicationWillEnterForeground, object: nil)    
}

 @objc func checkLocationService() {
    if CLLocationManager.locationServicesEnabled() {
        switch CLLocationManager.authorizationStatus() {
        case .denied, .notDetermined, .restricted:
            locationManager = CLLocationManager()
            locationManager.delegate = self
            locationManager.requestAlwaysAuthorization()
        case .authorizedWhenInUse, .authorizedAlways:
            ...
        }
    } else {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.requestAlwaysAuthorization()
    }
}

我已经在Info.plist中添加了所有三个位置键：

<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>My app need your location to work</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>My app need your location to work</string>
<key>NSLocationWhenInUseUsageDescription</key>
<string>My app need your location to work</string>

我正在iOS 11和12上进行测试，不知道出了什么问题。

Answer 1

您只需要请求一次身份验证...如果用户授予了权限，则您无需再次询问，如果他们拒绝，您将无法再次提示。如果遭到拒绝，您需要采取不同的处理方式。您将用户推送到设置菜单中的应用设置，用户必须从那里启用

switch CLLocationManager.authorizationStatus() {
    case .notDetermined, .restricted:
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.requestAlwaysAuthorization()
    case .authorizedWhenInUse, .authorizedAlways:
        ...
    case .denied:
        // present an alert advising the user that they need to go to the settings menu to enable the permissions as they have previously denied it. 
        // if the user presses Open Settings on the alert....
        if let url = URL(string: UIApplicationOpenSettingsURLString) { 
            UIApplication.shared.open(url: url) 
        }
    }

iOS要求始终授权的iOS首次显示权限警报

1 个答案: