ios - MapKit View 未放大到用户位置

Question

在我的应用程序中，我有一个 MKMapKit View ，当我的应用程序启动时，如果用户允许位置服务，我希望 map 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

使用用户的位置来计算 View 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)
}