swift - 如何访问用户坐标

Question

我正在尝试使用以下方式访问用户坐标:

import MapKit
import CoreLocation

override func viewDidLoad() {
    super.viewDidLoad()
    let locationManager = CLLocationManager()
    let userCoordinates = (locationManager.location?.coordinate)!
}

但是，它在加载模拟器时崩溃。我将模拟器位置设置为 Apple，并将隐私 key 输入 info.plist，但我不确定为什么这没有获取用户位置。

Answer 1

在开始安全地使用设备当前的地理位置之前，您需要先做一些事情，并且根据您提供的代码，我假设您可能会丢失一些内容，因此这里是一个常见的设置，使用Google map ，其作用基本上与其他 map 一样:

class YourViewController: UIViewController, CLLocationManagerDelegate {

    // properties
    var locationManager = CLLocationManager()
    var currentCoordinate: CLLocationCoordinate2D?

    // load view
    override func loadView() {
        addLocationManager()
    }

    // add location manager
    func addLocationManager() {

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

    }

    // location manager delegate: did change authorization
    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {

        switch status {

        case .restricted:
            print("LOCATION ACCESS RESTRICTED")

        case .denied:
            print("LOCATION ACCESS DENIED")

        case .notDetermined:
            print("LOCATION ACCESS NOT DETERMINED")

        case .authorizedAlways:
            fallthrough

        case .authorizedWhenInUse:
            print("LOCATION STATUS GRANTED")

        }

    }


    // location manager delegate: did fail with error
    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {

        locationManager.stopUpdatingLocation()
        print("LOCATION ACCESS ERROR: \(error)")

    }


    // location manager delegate: did update locations
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {

        let lastLocation = locations.last!

        // unhide map when current location is available
        if mapView.isHidden {
            mapView.camera = GMSCameraPosition.camera(withLatitude: lastLocation.coordinate.latitude, longitude: lastLocation.coordinate.longitude, zoom: 18, bearing: 0, viewingAngle: 0)
            mapView.isHidden = false
        }

        // update current location properties
        currentCoordinate = lastLocation.coordinate

    }


}

如果您已导入 MapKit，则无需导入 CoreLocation。