缩放以适合用户位置和注记地图视图swift
问题描述:
我的地图视图显示目标壁画的用户位置和注释,但缩放关闭。我如何根据它们之间的距离和居中距离来使其适合当前位置和目的地注释?缩放以适合用户位置和注记地图视图swift
func mapPoints(){
let annotations = MKPointAnnotation()
annotations.title = muralModel.muralName!
muralModel.getMainArtistModel(completion: { (anArtistModel) in
annotations.subtitle = " \(anArtistModel!.firstName!) \(anArtistModel!.lastName!)"
})
annotations.coordinate = coordinates
muralLocation.addAnnotation(annotations)
self.muralLocation.showsUserLocation = true
var zoomRect: MKMapRect = MKMapRectNull
let mapEdgePadding = UIEdgeInsets(top: 20, left: 20, bottom: 20, right: 20)
//convert CLLocationCoordinate2D to MKMapPointForCoordinate so you don't end up in Bering Sea
let userPoint = MKMapPointForCoordinate(muralLocation.userLocation.coordinate)
let destinationPoint = MKMapPointForCoordinate(coordinates)
let userPointRect = MKMapRectMake(userPoint.x, userPoint.y, 0.1, 0.1)
let destinationPointRect = MKMapRectMake(destinationPoint.x, destinationPoint.y, 0.1, 0.1)
zoomRect = userPointRect
zoomRect = MKMapRectUnion(zoomRect, destinationPointRect)
muralLocation.setVisibleMapRect(zoomRect, edgePadding: mapEdgePadding, animated: true)
}
答
您可以使用 'FUNC setRegion(_区域:MKCoordinateRegion,动画:BOOL)'。 MKCoordinateRegion有一个中心,也为该地区定义了一个跨度。这里的中心可以是距离用户位置和目的地相等的点。您可以相应地决定跨度。
让latSpan = muralLocation.userLocation.coordinate.latitude - coordinates.latitude 让大跨度= muralLocation.userLocation.coordinate.longitude - coordinates.longitude 变种地图= MKCoordinateRegion() 设跨度= MKCoordinateSpanMake(latSpan, longSpan) map.center = muralLocation.userLocation.coordinate map.span = span –
我这样做了,但是地图缩放没有预算......有帮助吗? –