ios - requestWhenInUseAuthorization 失败时发出通知

Question

我正在尝试创建一种 locationServices 权限身份验证，只有当应用程序具有 locationServices 权限时，您才能使用该应用程序。因此，如果用户拒绝 locationManager.requestWhenInUseAuthorization()，它应该向 viewController 提供有关此信息的信息。但是，如果用户拒绝，我似乎无法收到通知。最好的解决方案是什么？还是应该考虑以其他方式实现？

func determinePermission() {

    switch CLLocationManager.authorizationStatus() {

    case .AuthorizedAlways, .AuthorizedWhenInUse:
        if CLLocationManager.locationServicesEnabled() {

        }

    case .NotDetermined:
        locationManager.requestWhenInUseAuthorization()

    case .Restricted, .Denied:

        let storyboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let vc: UIViewController = storyboard.instantiateViewControllerWithIdentifier("PermissionController") as! PermissionViewController

        self.parentViewController!.tabBarController!.presentViewController(vc, animated: true, completion: nil)

    }
}

Answer 1

实现 CLLocationManagerDelegate 协议(protocol)。CLLocationManagerDelegate 有 locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) 方法，在授权状态改变时被调用.

func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
    switch status {
    case .AuthorizedWhenInUse:

    case .AuthorizedAlways:
        // you have access
        break

    case .Denied : 

    default:
        // you don't have access. add your code here to present new view
        break
    }
}