Question

问候专家，

据我所知，我们可以使用IOS的google map api来制作地图，如下所示。

import UIKit
import GoogleMaps
/* For cocoa:
   Import Cocoa
   Import MapKit
*/
   class ViewController: NSViewController, CLLocationManagerDelegate {

@IBOutlet var mapView: MKMapView!
var locationManager = CLLocationManager()
var didFindMyLocation = false
var strForCurLatitude = "";
var strForCurLongitude = "";
var currentLocation = locManager.location!


override func viewDidLoad() {
    super.viewDidLoad()

    locationManager.delegate = self
    locationManager.requestWhenInUseAuthorization()
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = kCLDistanceFilterNone
    locationManager.startUpdatingLocation()
}

func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
    if status == .authorizedWhenInUse {
        print("User allowed us to access location")
    }
}
func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
    print("Error while get location \(error)")
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    let location: CLLocation? = locationManager.location
    let coordinate: CLLocationCoordinate2D? = location?.coordinate
    print(coordinate!)
    print(coordinate!.latitude)
    print(coordinate!.longitude)
    strForCurLatitude = "\(coordinate!.latitude)"
    strForCurLongitude = "\(coordinate!.longitude)"
    let camera = GMSCameraPosition.camera(withLatitude: coordinate!.latitude, longitude: coordinate!.longitude, zoom: 15)
    let mapView = GMSMapView.map(withFrame: .zero, camera: camera)
    mapView.isMyLocationEnabled = true
    self.view = mapView

    let marker = GMSMarker()
    marker.position = CLLocationCoordinate2DMake(coordinate!.latitude, coordinate!.longitude)
    marker.map = mapView
}


override var representedObject: Any? {
    didSet {
    // Update the view, if already loaded.
    }
}
}

但是当我尝试使用类似的osx方法时（区别是我使用的是mapkit而不是google map ），它说 requestWhenInUseAuthorization（）'不可用。我使用了该线程How to get user location ? [macOS]，但似乎无法明确解决它是否可用于获取osx的当前位置的问题。那么，无法获取macOS / cocoa应用程序的当前位置吗？如果不是，那么如何在可可应用中获取当前位置？

我敢肯定，像我这样的许多xcode程序员都试图解决这个问题。任何答案您都会得到极大的赞赏。：）

Answer 1

requestWhenInUseAuthorization 在macOS上不可用。

这是NSViewController子类的源，该子类在macOS 10.13.6的Xcode 10.1中成功检查了位置管理器和当前位置：

import Cocoa
import MapKit
import CoreLocation

class MapViewController: NSViewController, CLLocationManagerDelegate {

    @IBOutlet weak var mapView: MKMapView!
    let locationManager = CLLocationManager()

    override func viewDidLoad() {
        super.viewDidLoad()

        locationManager.delegate = self
        locationManager.startUpdatingLocation()
    }

    func locationManager(_ manager: CLLocationManager, 
                        didChangeAuthorization status: CLAuthorizationStatus) {
        print("location manager auth status changed to:" )
        switch status {
            case .restricted:
                print("status restricted")
            case .denied:
                print("status denied")

        case .authorized:
                print("status authorized")
                let location = locationManager.location
                print("location: \(String(describing: location))")

            case .authorizedAlways:
                print("status authorized always")
            case .notDetermined:
                print("status not yet determined")
        }


    }

    func locationManager(_ manager: CLLocationManager, 
                            didFailWithError error: Error) {
        print( "location manager failed with error \(error)" )
    }
}

如果您在首次启动应用程序时对“启用位置服务”提示说“是”，则在macOS上为我工作。

请注意，您还需要NSLocationWhenInUseUsageDescription属性列表条目，如文档中所述。

控制台输出（被稍微混淆）：

位置管理器身份验证状态更改为：状态尚未确定位置管理员身份验证状态更改为：状态授权位置：可选（<+ 4X.48，-12X.62632228> +/- 65.00m（速度-1.00 mps / 课程-1.00）@ 181/3 / 18，11：42：48 AM太平洋夏令时间）

设置地图以及OSX的用户当前位置

1 个答案: