MapKit View 未放大到用户位置

Question

在我的应用程序中，我有一个MKMapKit 视图，当我的应用程序启动时，如果用户允许定位服务，我希望地图放大到用户的位置。我写的代码是：

override func viewDidLoad() {
    super.viewDidLoad()

    mapKitView.delegate = self
    mapKitView.showsUserLocation = true
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.delegate = self

    if (CLLocationManager.locationServicesEnabled()) {

        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestAlwaysAuthorization()
        locationManager.requestWhenInUseAuthorization()
    }

    locationManager.requestWhenInUseAuthorization()

    if CLLocationManager.locationServicesEnabled() {
        locationManager.startUpdatingLocation()
    }

    DispatchQueue.main.async {
        self.locationManager.startUpdatingLocation()
    }
}


func locationManager(manager: CLLocationManager!, didUpdateLocations locations: [AnyObject]!) {

    let noLocation = CLLocationCoordinate2D()
    let viewRegion = MKCoordinateRegionMakeWithDistance(noLocation, 200, 200)
    mapKitView.setRegion(viewRegion, animated: false)
}

在我的应用中，它显示了用户的位置，但没有动画和放大。

Answer 1

使用用户的位置计算视图区域并将animated参数更改为true：

if let location = mapKitView.userLocation.location {
    let viewRegion = MKCoordinateRegionMakeWithDistance(location, 200, 200)
    mapKitView.setRegion(viewRegion, animated: true)
}

Answer 2

在 Swift 3.0 中，在您的 didUpdateLocation 方法中尝试我的代码。

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
    {
        //get location cordinate
        let locValue:CLLocationCoordinate2D = manager.location!.coordinate
        print(locValue)
        //set updating location stop
        locationManager.stopUpdatingLocation()

        let location = locations.last! as CLLocation//create object of CLLocation
        //get location cordinate

        let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)

        //set map zooming using region
        let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
        self.mapView.setRegion(region, animated: true)
}

我希望这是工作@Rahul Bir

Answer 3

在 Swift 3.0 中，如果您想在地图视图的起始视图上缩放地图套件，则应使用此代码。

var zoomIn = false
var zoomAnnotation:MKAnnotation

func mapView(mapView: MKMapView, regionDidChangeAnimated animated: Bool) {
    if let annotation = zoomAnnotation where zoomIn == true {
           let region = MKCoordinateRegion(center: zoomAnnotation.coordinate, span: MKCoordinateSpan(latitudeDelta: 0.075, longitudeDelta: 0.075))
           mapView.setRegion(region, animated: true)
           zoomIn = false
    }
}