快速放大位置答案

【问题标题】：Swift zoom in on location快速放大位置
【发布时间】：2017-07-22 04:39:53
【问题描述】：

我有一个地址，我正在尝试使用该地址显示在带有图钉的地图视图上，而不是实际坐标。我可以将地图与图钉一起显示，但它在我的位置上放大得不够近。无论如何我可以放大该位置吗？在此先感谢

@IBOutlet weak var mapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()

    let address = (community!["address"] as AnyObject)

    let location : String = address as! String
    let geocoder = CLGeocoder()
    geocoder.geocodeAddressString(location) { (placemarks, error) in
        if let placemarks = placemarks {
            if placemarks.count != 0 {
                let annotation = MKPlacemark(placemark: placemarks.first!)
                self.mapView.addAnnotation(annotation)


            }
        }
    }
}

【问题讨论】：

标签： ios swift mkmapview

【解决方案1】：

使用此扩展程序，可以满足您的需求

extension MKMapView {
  func zoomToUserLocation() {
     self.zoomToUserLocation(latitudinalMeters: 1000, longitudinalMeters: 1000)
  }

  func zoomToUserLocation(latitudinalMeters:CLLocationDistance,longitudinalMeters:CLLocationDistance)
  {
    guard let coordinate = userLocation.location?.coordinate else { return }
    self.zoomToLocation(location: coordinate, latitudinalMeters: latitudinalMeters, longitudinalMeters: longitudinalMeters)
  }

  func zoomToLocation(location : CLLocationCoordinate2D,latitudinalMeters:CLLocationDistance = 100,longitudinalMeters:CLLocationDistance = 100)
  {
    let region = MKCoordinateRegionMakeWithDistance(location, latitudinalMeters, longitudinalMeters)
    setRegion(region, animated: true)
  }

}

像这样在你的代码中使用

@IBOutlet weak var mapView: MKMapView!

override func viewDidLoad() {
    super.viewDidLoad()

    let address = (community!["address"] as AnyObject)

    let location : String = address as! String
    let geocoder = CLGeocoder()
    geocoder.geocodeAddressString(location) { (placemarks, error) in
        if let placemarks = placemarks {
            if placemarks.count != 0 {
                let annotation = MKPlacemark(placemark: placemarks.first!)
                self.mapView.addAnnotation(annotation)
                //Using it
                self.mapView.zoomToLocation(location: annotation.coordinate)

            }
        }
    }
}

希望对你有帮助

【讨论】：

【解决方案2】：

In viewcontoller.m

func mapView(_ mapView: MKMapView, didUpdate userLocation: MKUserLocation) {
    if Is_Centered == false {
        Map.setCenter(userLocation.coordinate, animated: true)
        Is_Centered = true
        OperationQueue.mainQueue.addOperation({() -> Void in
            self.setZoomOnMap(userLocation.coordinate, map: Map)
        })
    }
}


func setZoomOnMap(_ location: CLLocationCoordinate2D, map mapName: MKMapView) {
    let region: MKCoordinateRegion
    let span1: MKCoordinateSpan
    span1.latitudeDelta = 0.002
    // change as per your zoom level
    span1.longitudeDelta = 0.005
    region.span = span1
    region.center = location
    mapName.setRegion(region, animated: true)
    mapName.regionThatFits(region)
    mapName.isZoomEnabled = true
}

【讨论】：

【解决方案3】：

选择您的 mapkit 并进入检查编辑器并单击缩放选项而不是其工作...

【讨论】：

我想在加载开始时放大位置。我不想让用户手动操作。