Ios 如何在Swift 3（Xcode 8）中缩放到特定坐标？

我正在尝试使用坐标缩放到某个位置。

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我怎样才能做到这一点？

您是说地图视图吗？你是说你有一个纵横地图坐标，你想把地图缩放到那个点？你需要更清楚、更具体。

import UIKit
import MapKit

class HomeViewController: UIViewController, MKMapViewDelegate {

@IBOutlet weak var mapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()
    mapView.showsUserLocation = true


    if let userLocation = mapView.userLocation.location {
        //let frontedUserLocation = CLLocationCoordinate2DMake(37.7857, -122.4021)
        mapView.centerCoordinate = userLocation.coordinate
        //mapView.centerCoordinate = frontedUserLocation
        //let region = MKCoordinateRegionMakeWithDistance(frontedUserLocation, 1855, 1855)
        let region = MKCoordinateRegionMakeWithDistance(userLocation.coordinate, 9484.1, 9484.1)
        mapView.setRegion(region, animated: true)
    }
    mapView.delegate = self
}