MapKit showUserLocation未显示蓝色位置标记

Question

我设置了一个自定义的mapView，并在我的视图控制器上全屏显示它。初始化mapView时，它会检查位置授权，如果授权，则会转换为showsUserLocation = true

我可以在我的控制台中指出，这个标志在授权后被点击并变为true，mapView将正确运行我的centerViewOnUserLocation()方法，但我仍然看不到地图上的蓝点位置。我是在我的iPhone而不是模拟器上测试的。下面是一些代码示例：

视图控制器

    private lazy var mapView: EVMapView = {
        let result: EVMapView = EVMapView()
        view.addSubview(result)
        result.delegate = self
        EVConstraintHelper.anchor(view: result, options: .classic)
        return result
    }()

自定义MapView

class EVMapView: MKMapView, EVLocationProtocol {
    var locationManager: CLLocationManager?

    init() {
        super.init(frame: .zero)
        checkLocationServices()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    func checkLocationServices() {
        if CLLocationManager.locationServicesEnabled() {
            setupLocationManager()
            checkLocationAuth()
        } else {
            print("Auth Denied")
        }
    }

    func setupLocationManager() {
        locationManager = CLLocationManager()
        locationManager?.delegate = self
        locationManager?.desiredAccuracy = kCLLocationAccuracyBest
    }

    func checkLocationAuth() {
        switch CLLocationManager.authorizationStatus() {
        case .authorizedWhenInUse, .authorizedAlways:
            showsUserLocation = true
            centerViewOnUserLocation()
        case .denied:
            print("Auth Denied")
        case .notDetermined:
            locationManager?.requestWhenInUseAuthorization()
        case .restricted:
            print("Auth Restricted")
        @unknown default:
            print("Unkown default selected in \(#function)")
        }
    }

    func centerViewOnUserLocation() {
        guard let coordinate = locationManager?.location?.coordinate else { return }
        let span = MKCoordinateSpan.init(latitudeDelta: 2, longitudeDelta: 2)
        let region = MKCoordinateRegion.init(center: coordinate, span: span)
        setRegion(region, animated: true)
    }
}

我在使用使用描述消息时设置了plist Privacy - Location，但不确定它还会是什么。

Answer 1

我想通了..。我对mapView使用了自定义的placemark注释，它删除了默认注释。从技术上讲，蓝色的当前位置标记是默认注释，因此也将其删除。