MapKit缩放到用户当前位置-MapKitzoomtousercurrentlocation

1  

when you set region -> you cannot zoom the map anymore. below to fix that

当你设置区域 - >你不能再缩放地图。下面来解决这个问题

func yourFuncName() {
//this is global var
regiOnHasBeenCentered= false
if !self.regionHasBeenCentered {
    let span: MKCoordinateSpan = MKCoordinateSpanMake(0.01, 0.01)
    let userLocation: CLLocationCoordinate2D = CLLocationCoordinate2DMake(_cllocationOfUserCurrentLocation!.coordinate.latitude, _cllocationOfUserCurrentLocation!.coordinate.longitude)
    let region: MKCoordinateRegion = MKCoordinateRegionMake(userLocation, span)

    self.mapView.setRegion(region, animated: true)
    self.regiOnHasBeenCentered= true
    }

    self.mapView.showsUserLocation = true
}

0  

Try with MKMapViewDelegate func:

尝试使用MKMapViewDelegate func：

var isInitiallyZoomedToUserLocation: Bool = false 

func mapView(_ mapView: MKMapView, didUpdate userLocation: MKUserLocation) {
    if !isInitiallyZoomedToUserLocation {
       isInitiallyZoomedToUserLocation = true
       mapView.showAnnotations([userLocation], animated: true)
    }
}

0  

In swift 4.1. To change the Zoom level you need to change the span value i.e MKCoordinateSpan(latitudeDelta: 0.95, longitudeDelta: 0.95)

在swift 4.1中。要更改缩放级别，您需要更改跨度值，即MKCoordinateSpan（latitudeDelta：0.95，longitudeDelta：0.95）

let lat =  "33.847105"
let lOng= "-118.2673272"
let region = MKCoordinateRegion(center: CLLocationCoordinate2D(latitude: Double(lat)!, longitude: Double(long)!), span: MKCoordinateSpan(latitudeDelta: 0.95, longitudeDelta: 0.95))
DispatchQueue.main.async {
    self.mapView(self.mapView, regionDidChangeAnimated: true)
}