在iOS中找不到位置并自动关闭警报

Question

import UIKit
import MapKit
import CoreLocation

class ViewController: UIViewController, CLLocationManagerDelegate {

    @IBOutlet weak var mapKit: MKMapView!

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let location = locations[0]
        let span: MKCoordinateSpan = MKCoordinateSpanMake(0.01, 0.01)
        let myLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
        let region: MKCoordinateRegion = MKCoordinateRegionMake(myLocation, span)
        mapKit.setRegion(region, animated: true)
        self.mapKit.showsUserLocation = true
    }

    override func viewDidLoad() {
        super.viewDidLoad()
        let manager = CLLocationManager()
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyBest
        manager.requestAlwaysAuthorization()
        manager.startUpdatingLocation()
    }
}

This is my source code. and I'm Using Xcode 9 and swift 4.0

When I build and run, debug area print this "Could not inset legal attribution from corner 4", and Using GPS alert automatic dismiss. So I can't accept using GPS allow.

I also complete info.plist setting like this.

Privacy - Location Always and When In Use Usage Description Privacy - Location Always Usage Description Privacy - Location When In Use Usage Description.

What is the problem?

Answer 1

Make CLLocationManager as global instance var -

    @IBOutlet weak var mapKit: MKMapView!
    let manager = CLLocationManager()

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
            let location = locations[0]
            let span: MKCoordinateSpan = MKCoordinateSpanMake(0.01, 0.01)
            let myLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude)
            let region: MKCoordinateRegion = MKCoordinateRegionMake(myLocation, span)
            mapKit.setRegion(region, animated: true)
            self.mapKit.showsUserLocation = true
        }


    override func viewDidLoad() {
        super.viewDidLoad()
        manager.delegate = self
        manager.desiredAccuracy = kCLLocationAccuracyBest
        manager.requestAlwaysAuthorization()
        manager.startUpdatingLocation()
    }

This will prevent alert from dismissing automatically.