iOS11 用户位置不显示蓝色标记

Question

我正在开发一个应用程序，要求用户提供位置许可。我已在我的 info.plist 文件中请求以下所有权限

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

我的代码如下

import UIKit
import MapKit
import CoreLocation

class MapVC: UIViewController {

    @IBOutlet weak var mapView: MKMapView!

    var locationManager = CLLocationManager()
    let authorizationStatus = CLLocationManager.authorizationStatus()
    let regionRadius: Double = 1000

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        mapView.delegate = self
        locationManager.delegate = self
        configureLocationServices()
    }

    @IBAction func centerMapbtnPressed(_ sender: Any) {
        if authorizationStatus == .authorizedAlways || authorizationStatus == .authorizedWhenInUse {
            centerMapOnUserLocation()
        }
    }
}

extension MapVC: MKMapViewDelegate {
    func centerMapOnUserLocation(){
        guard let coordinate = locationManager.location?.coordinate else {
            return
        }
        let coordinateRegion = MKCoordinateRegionMakeWithDistance(coordinate, regionRadius * 2, regionRadius * 2)

        mapView.setRegion(coordinateRegion, animated: true)
    }
}

extension MapVC: CLLocationManagerDelegate {

    func configureLocationServices(){
        if authorizationStatus == .notDetermined {
            locationManager.requestAlwaysAuthorization()
        }else {
            return
        }
    }

    func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
        centerMapOnUserLocation()
    }

}

问题是我没有看到显示用户当前位置的蓝色标记，但它显示了用户所在的正确区域。如果我滚动到 map 中的某个其他位置并单击操作为 centerMapbtnPressed，不行。

Answer 1

尝试将 MKMapView 上的 showsUserLocation 设置为 true。好像你还没有这样做。 (有关详细信息，请参阅 the docs)