swift - OS X 保存位置权限

Question

我正在获取用户的 GPS 位置，如下所示:

var manager:CLLocationManager!

override func viewDidLoad() {
    super.viewDidLoad()

    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.startUpdatingLocation()
    //manager.requestAlwaysAuthorization()
    //manager.requestWhenInUseAuthorization()

}

func locationManager(manager:CLLocationManager, didUpdateLocations locations:    [AnyObject]) { // Updated to current array syntax [AnyObject] rather than  AnyObject[]
    println("locations = \(locations)")
}

os x 应用程序似乎不存在注释掉的函数。它仍然对我有用，所以没关系。

但是每次我运行代码时，它都会请求使用位置的权限。 是否可以将权限存储在某处，以便仅在第一次执行时询问？

Answer 1

引用Apple的documentation :

Call the authorizationStatus class method to get the current authorization status for your app.

If the authorization status is kCLAuthorizationStatusRestricted or kCLAuthorizationStatusDenied, your app is not permitted to use location services and you should abort your attempt to use them.

您在 OS X 上的代码应如下所示:

override func viewDidLoad() {
    super.viewDidLoad()

    let status = CLLocationManager.authorizationStatus()
    if status == .Restricted || status == .Denied {
        // User permission not given
        return
    }
    
    manager = CLLocationManager()
    manager.delegate = self
    manager.desiredAccuracy = kCLLocationAccuracyBest
    manager.startUpdatingLocation()
}

权限由 Mac OS X 集中管理。第一次调用 startUpdatingLocation 时，它会请求权限，然后记住用户的决定。