swift - 缩放以适应用户位置和注释 map View 快速

Question

我的 map View 显示了目标壁画的用户位置和注释，但缩放已关闭。如何根据当前位置和目的地注释的距离以及更居中的程度使其缩放以适应当前位置和目的地注释？

这就是它的缩放方式(这么远)

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)
}

Answer 1

您可以使用“func setRegion(_region: MKCooperativeRegion,animated: Bool)”。 MKCoordinateRegion 有一个中心，还定义了该区域的跨度。这里的中心可以是与用户位置和目的地距离相等的点。您可以相应地决定跨度。