swift - 位置服务不会在新的 ViewController 类中运行

Question

这里是 Swift 新手 - 我的位置服务在 View Controller 类中完美运行，但是我意识到它在逻辑上位于早期的 View Controller 类中并将其移动到这里，但是从那时起位置服务完全被跳过，只运行序列。我已经检查了明显的内容( View Controller 列在文件检查器中)。非常感谢任何帮助，

import UIKit
import CoreLocation

var userLat = Double()
var userLong = Double()

class FirstViewController: UIViewController, CLLocationManagerDelegate {

    //instantiate location manager
    var locationManager = CLLocationManager()

    //get location data
    func determineMyCurrentLocation() {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()

        //start updating location
        if CLLocationManager.locationServicesEnabled() {
            locationManager.startUpdatingLocation()
        }
    }

    //get coordinates
    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let userLocation:CLLocation = locations[0] as CLLocation

        //check to see if user has allowed app to see location and use those lats if is the case
        if CLLocationManager.locationServicesEnabled() {
        userLat = userLocation.coordinate.latitude
        userLong = userLocation.coordinate.longitude
        }

        //check if you got any data?
        print("user latitude = \(userLocation.coordinate.latitude)")
        print("user longitude = \(userLocation.coordinate.longitude)")

        //stop updating location
        manager.stopUpdatingLocation()

    }


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


    //perform Seques
    @IBAction func CheckLocation(_ sender: Any) {
        //cecking if user location is enableded?
        if CLLocationManager.locationServicesEnabled(){

            performSegue(withIdentifier: "two", sender: self)

        }

        else{
            performSegue(withIdentifier: "three", sender: self)
        }

    }

    @IBAction func Locatiohn(_ sender: Any) {

        performSegue(withIdentifier: "three", sender: self)
    }




    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.backgroundColor = UIColor(patternImage: UIImage(named: "sun.jpg")!)
        // Do any additional setup after loading the view.

    }


    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated   )


    }



    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    //override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destinationViewController.
    // Pass the selected object to the new view controller.






}

Answer 1

我通过从以下代码中添加删除“func”并将其放入 viewDidLoad ....\

func determineMyCurrentLocation() {
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()

        //start updating location
        if CLLocationManager.locationServicesEnabled() {
            locationManager.startUpdatingLocation()
        }