MapKit 默认缩放

Question

出于某种原因，我的市场不会扩大到本地区域。事实上，无论我改变什么，它都不会改变缩放。我是在错误的代码部分加载它，还是遗漏了其他内容？感谢任何帮助。

我的代码是：

@IBOutlet var here: MKMapView!

var locationManager: CLLocationManager?
var selectedItem: String?
func locationManager
    (manager: CLLocationManager!,didUpdateToLocation newLocation: CLLocation!,
    fromLocation oldLocation: CLLocation!){
        manager.desiredAccuracy = kCLLocationAccuracyBest


        var region = self.here.region as MKCoordinateRegion

        self.here.setRegion(region, animated: true)
        region.span.longitudeDelta = 0.0144927536
        region.span.latitudeDelta = 0.0144927536

}

Answer 1

我认为您需要在设置区域之前设置纬度和经度。 setRegion 函数是放大某个部分的功能，缩放的级别取决于您的跨度。这是缩放地图的示例。

let span = MKCoordinateSpanMake(0.075, 0.075)
let region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: lat, longitude: long), span: span)
mapView.setRegion(region, animated: true)

MapKit 默认缩放

MapKit default zoom

mapkit

swift