ios - didUpdateLocations 在 Swift 3 中不起作用

Question

我正在将我的应用程序更新到 Swift 3，但无法让它打印出位置坐标。

我的 info.plist 文件中有“隐私 - 使用时位置”、“隐私 - 始终位置”和“隐私 - 位置使用说明”。

@IBAction func activateTestModeButton(_ sender: AnyObject) {

    locationManager.startUpdatingLocation()
    print("Method called")
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations newLocation: CLLocation, fromLocation oldLocation: CLLocation){
        loadUser()
        loadCoreData()

        print("Updating location")

        let latitude:String = "\(newLocation.coordinate.latitude)"
        let longitude:String = "\(newLocation.coordinate.longitude)"

        print("Latitude = \(newLocation.coordinate.latitude)")
        print("Longitude = \(newLocation.coordinate.longitude)")      }

它打印“调用的方法”，但没有其他内容。我还包含了 didFailWithError 方法，我认为这是必需的，它不会打印任何内容:

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

人们认为我拥有的其他相关代码:

/* Asking the user if we can access their location */
func Authorization(){
    if CLLocationManager.locationServicesEnabled()
    {
        switch CLLocationManager.authorizationStatus()
        {
        case .authorizedAlways:
            print("Authorized")
        case .authorizedWhenInUse:
            print("Authorized when in use")
        case .denied:
            displayAlertWithTitle("Not determined", message: "Location services are not allowed for this app")
        case .notDetermined:
            print("Not Determined")
            if let manager = self.locationManager
            {
                manager.requestWhenInUseAuthorization()
            }
        case .restricted:
            displayAlertWithTitle("Restricted", message: "Location services are not allowed for this app")
        }
    }
    else
    {
        print("Location services are not enabled")
    }
}

/* Location Detection */
func permission(){
    if CLLocationManager.authorizationStatus() == .notDetermined
    {
        locationManager?.requestAlwaysAuthorization()
    }
}

override func viewDidAppear(_ animated: Bool){
    super.viewDidAppear(animated)
    Authorization()
}

override func viewDidLoad() {
    super.viewDidLoad()
    self.locationManager = CLLocationManager()
    self.locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    self.locationManager?.distanceFilter = 200
    self.locationManager?.delegate = self

}

Answer 1

我建议您将管理 Location 的代码移动到像这样的类中。这段代码来 self 几个月前制作的一个应用程序，我测试了它是否有效，我确实如此。所以试试吧。您只需要创建此类的对象。我在方法 locationManager(:didupdate) 中留下了注释打印，您可以取消注释以查看您所在位置的所有更改。

我知道它并不完美，但它让我完成了工作。

import Foundation
import MapKit
import CoreLocation

class Location: CLLocationManager, CLLocationManagerDelegate  {
    private var latitude:Double
    private var longitud:Double
    private let locationManager = CLLocationManager()

    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
    override init() {
        self.latitude = 0.0
        self.longitud = 0.0
        self.locationManager.requestWhenInUseAuthorization()

        super.init()

        if CLLocationManager.locationServicesEnabled() {
            self.locationManager.delegate = self
            self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            self.locationManager.requestAlwaysAuthorization()
            self.locationManager.startUpdatingLocation()
        }
    }

    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
    internal func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let locValue:CLLocationCoordinate2D = (manager.location?.coordinate)!
        //print("locations = \(locValue.latitude) \(locValue.longitude)")

        self.latitude = locValue.latitude
        self.longitud = locValue.longitude
    }

    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
    func getLatitude()->NSNumber{
        return self.latitude as NSNumber
    }

    /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -*/
    func getLongitude()->NSNumber{
        return self.longitud as NSNumber
    }

}