Swift：如何保存經緯度以在另一個Swift文件中使用

Question

我在ViewController中有以下代碼可以捕獲用戶的當前位置：

@IBOutlet weak var userMapView: MKMapView!

var locationManager = CLLocationManager()

override func viewDidLoad() {
    super.viewDidLoad()

    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()

}

func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

    let location : CLLocationCoordinate2D = manager.location!.coordinate

    print(location.latitude)

    let latitudeDelta : CLLocationDegrees = 0.01
    let longitudeDelta : CLLocationDegrees = 0.01

    let span : MKCoordinateSpan = MKCoordinateSpanMake(latitudeDelta, longitudeDelta)

    let center : CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.latitude, location.longitude)

    let region : MKCoordinateRegion = MKCoordinateRegionMake(center, span)

    self.userMapView.setRegion(region, animated: false)

    self.userMapView.removeAnnotations(userMapView.annotations)

    let userPinLocation : CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.latitude, location.longitude)

    let pinAnnotation = MKPointAnnotation()

    pinAnnotation.coordinate = userPinLocation

    pinAnnotation.title = "Sua localização atual"

    self.userMapView.addAnnotation(pinAnnotation)

}

我還有另一個具有數據庫功能的快捷文件，我需要保存緯度和經度以在數據庫中使用

如何將經度和緯度存儲在變量中以便在locationManager函數外部使用？

Answer 1

在locationManager（_：didUpdateLocations :)實例方法中執行數據庫操作。 或var全局模型。

Answer 2

CLLocationCoordinate2D只是一個包含2個Double的Struct 。

didUpdateLocations函數的第一行將當前位置提取到局部變量location ：

let location : CLLocationCoordinate2D = manager.location!.coordinate

您可以將其從局部變量更改為實例變量，並且在該函數外部將可見。 我將其設為可選，因此如果從未分配值，則它將為nil。