使用Swift獲取用戶位置來制作應用

Question

我運行了獲取用戶位置的代碼，這是我得到的錯誤。 有人可以幫我解決嗎？

我的代碼如下：

import UIKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

@IBOutlet weak var citybtn: UIButton!
@IBOutlet weak var citylbl: UILabel!

let locationManager = CLLocationManager()
var currentLocation : CLLocation!

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    // Used to start getting the users location
    //let locationManager = CLLocationManager()


    // For use when the app is open
    //locationManager.requestAlwaysAuthorization()

    // If location services is enabled get the users location
    //if CLLocationManager.locationServicesEnabled() {
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest // You can change the locaiton accuary here.
    locationManager.requestWhenInUseAuthorization()



}

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

    locationAuthStatus()
}

func locationAuthStatus() {

    if CLLocationManager.authorizationStatus() == .authorizedWhenInUse {

        currentLocation = locationManager.location
        print(currentLocation.coordinate.latitude)
        print(currentLocation.coordinate.longitude)

    } else {
        locationManager.requestWhenInUseAuthorization()
        locationAuthStatus()
    }
}



@IBAction func buttonpresses(_ sender: Any) {

}



}

Answer 1

聽起來您沒有啟用目標的位置更新功能：

• 選擇目標
• 選擇能力
• 在后台模式下，勾選位置更新