将地图置于用户位置的中心未显示蓝点

Question

我有一个标签栏，一个是用来显示地图的。当我切换到这个标签栏时，它会请求权限并自动获取当前位置。

我写完代码，设置模拟位置为苹果，会在屏幕中央显示一个蓝点，但是当我选择自定义位置，指定一个位置时，蓝点不显示在屏幕中央地图的中心。

我需要拖动地图，会在中心位置附近约1~2公里处找到蓝点。我在真机上测试也有同样的问题

使用方法自动显示当前位置，但不显示蓝点

 override func viewDidLoad() {
        super.viewDidLoad()
        locationManager = CLLocationManager()
        locationManager!.delegate = self

        if CLLocationManager.authorizationStatus() == .authorizedWhenInUse{
            locationManager!.startUpdatingLocation()
            locationManager!.desiredAccuracy = kCLLocationAccuracyBestForNavigation
        }else{
            locationManager!.requestWhenInUseAuthorization()
        }

    }
 func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let newLocation = locations.last!
        let coordinateRegion = MKCoordinateRegionMakeWithDistance(newLocation.coordinate, 100, 100)
        mapView.setRegion(mapView.regionThatFits(coordinateRegion), animated: true)
        location = newLocation
        locationManager?.stopUpdatingLocation()
        locationManager = nil
}

我添加了一个按钮 - 当它没有显示蓝点时，点击按钮会将蓝点设置在地图的中心。这两种方法具有相同的功能，但它们产生不同的视图。为什么？

@IBAction func showUser() {
let region = MKCoordinateRegionMakeWithDistance(mapView.userLocation.coordinate, 100, 100)
        mapView.setRegion(mapView.regionThatFits(region), animated: true)

}

the screenshot

Answer 1

我只是使用此编码更新到地图视图中心的位置

请将此密钥添加到 info.plist 文件

    <key>NSLocationWhenInUseUsageDescription</key>
    <string></string>
    <key>NSLocationAlwaysUsageDescription</key>
    <string></string>


override func viewDidLoad() {
  super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        locationManager.delegate = self
        map.delegate = self
        map.showsUserLocation = true
        if CLLocationManager.authorizationStatus() == .authorizedWhenInUse{
            locationManager.startUpdatingLocation()
            locationManager.desiredAccuracy = kCLLocationAccuracyKilometer
        }else{
            locationManager.requestWhenInUseAuthorization()
        }

    }
    func mapView(_ mapView: MKMapView, didUpdate userLocation: MKUserLocation) {
        mapView .setCenter(userLocation.coordinate, animated: true)
    }

您可以从 HERE

下载演示

将地图置于用户位置的中心未显示蓝点

center the map on user's location didn't show the blue dot

cllocationmanager

ios

swift

}