iOS Swift如何打开位置权限弹出窗口

没有任何默认功能,一旦用户拒绝了位置权限,就会弹出位置权限。您需要向用户显示需要权限的警报,然后将用户重定向到设置屏幕。 以下是您可以使用的完整代码。

    func hasLocationPermission() -> Bool {
        var hasPermission = false
        if CLLocationManager.locationServicesEnabled() {
            switch CLLocationManager.authorizationStatus() {
            case .notDetermined, .restricted, .denied:
                hasPermission = false
            case .authorizedAlways, .authorizedWhenInUse:
                hasPermission = true
            }
        } else {
            hasPermission = false
        }
        
        return hasPermission
    }

现在通过此功能检查位置权限,并在需要时显示警报。

    if !hasLocationPermission() {
            let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: UIAlertControllerStyle.alert)
            
            let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
                //Redirect to Settings app
                UIApplication.shared.open(URL(string:UIApplicationOpenSettingsURLString)!)
            })
            
            let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.cancel)
            alertController.addAction(cancelAction)
            
            alertController.addAction(okAction)
            
            self.present(alertController, animated: true, completion: nil)
        }

也别忘了导入 CoreLocation .

func hasLocationPermission() -> Bool {
    var hasPermission = false
    let manager = CLLocationManager()
    
    if CLLocationManager.locationServicesEnabled() {
        switch manager.authorizationStatus {
        case .notDetermined, .restricted, .denied:
            hasPermission = false
        case .authorizedAlways, .authorizedWhenInUse:
            hasPermission = true
        @unknown default:
                break
        }
    } else {
        hasPermission = false
    }
    
    return hasPermission
}

if !hasLocationPermission() {
    let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: .alert)
    
    let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
        //Redirect to Settings app
        UIApplication.shared.open(URL(string:UIApplication.openSettingsURLString)!)
    })
    
    let cancelAction = UIAlertAction(title: "Cancel", style: .cancel)
    alertController.addAction(cancelAction)
    
    alertController.addAction(okAction)
    
    self.present(alertController, animated: true, completion: nil)
}

如果用户拒绝权限,则打开权限弹出窗口

 /*  func checkLocation() {
    if CLLocationManager.authorizationStatus() != .authorizedWhenInUse
    {
        print("requesting autorization")
        locationManager.requestWhenInUseAuthorization()

    } else {
        print("start updating location")
    }
}*/

func askEnableLocationService() ->String {
    var showAlertSetting = false
    var showInitLocation = false
    if CLLocationManager.locationServicesEnabled() {
        switch CLLocationManager.authorizationStatus() {
        case .denied:
            showAlertSetting = true
            print("HH: kCLAuthorizationStatusDenied")
        case .restricted:
            showAlertSetting = true
            print("HH: kCLAuthorizationStatusRestricted")
        case .authorizedAlways:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusAuthorizedAlways")
        case .authorizedWhenInUse:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusAuthorizedWhenInUse")
        case .notDetermined:
            showInitLocation = true
            print("HH: kCLAuthorizationStatusNotDetermined")
        default:
            break
        }
    }else{
        showAlertSetting = true
        print("HH: locationServicesDisabled")

    }
    if showAlertSetting {
        let alertController = UIAlertController(title: "xxxxxx", message: "Please enable location service in the settings", preferredStyle: .alert)
        let OKAction = UIAlertAction(title: "OK", style: .default) { (action:UIAlertAction!) in



            if let url = URL(string: UIApplicationOpenSettingsURLString) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            }

        }
        alertController.addAction(OKAction)
        self.window?.rootViewController?.present(alertController, animated: true, completion:nil)

    }
    if showInitLocation {

        return "YES"

    }
    return "NO"

}

一旦用户拒绝该权限,则您的应用程序的警报将被禁用,并且不会再次显示。 您可以向用户显示需要权限的弹出窗口。

  if CLLocationManager.locationServicesEnabled() {
        switch CLLocationManager.authorizationStatus() {
        case .notDetermined, .restricted, .denied:
            showPermissionAlert()
        case .authorizedAlways, .authorizedWhenInUse:
            locationManager.startUpdatingLocation()
        }
    } else {
       locationManager.startUpdatingLocation()
    }

现在通过此功能检查位置权限,并在需要时显示警报。

   func showPermissionAlert(){
    let alertController = UIAlertController(title: "Location Permission Required", message: "Please enable location permissions in settings.", preferredStyle: UIAlertController.Style.alert)

    let okAction = UIAlertAction(title: "Settings", style: .default, handler: {(cAlertAction) in
        //Redirect to Settings app
        UIApplication.shared.open(URL(string:UIApplication.openSettingsURLString)!)
    })

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

    alertController.addAction(okAction)

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

这是默认行为。一旦弹出窗口第一次显示。随后的请求将被视为拒绝或在第一次选择时选择的任何内容。但是,您可以实现自己的警报,并将用户直接发送到设置应用程序以授予位置访问权限,如下所示:

//check if user has denied the access on first popup
    if !permissionGranted {

        let permissionAlert = UIAlertController(title: "Location Access", message: "Requires location access to take advantage of this feature. Please provide location access from settings", preferredStyle: .alert)

        let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
        let settingAction = UIAlertAction(title: "Settings", style: .default) { (action) in
            guard let appSettingURl = URL(string: UIApplicationOpenSettingsURLString) else { return }
            if UIApplication.shared.canOpenURL(appSettingURl) {
                UIApplication.shared.open(appSettingURl, options: [:], completionHandler: nil)
            }
        }
        permissionAlert.addAction(cancelAction)
        permissionAlert.addAction(settingAction)
        present(permissionAlert, animated: true, completion: nil)
    }