iOS开发 - MapKit框架之大头针及当前位置

创建大头针、增加标记及覆盖物

步骤-SB拖入地图视图-然后如下

1.png

import MapKit

class MapViewController: UIViewController,MKMapViewDelegate {
    
    @IBOutlet weak var mapView: MKMapView!
    
    override func viewDidLoad() {
        super.viewDidLoad()

        self.mapView.delegate = self

        //创建大头针
        let center =  CLLocationCoordinate2DMake(23.114155, 113.318977)
        let span = MKCoordinateSpanMake(0.2, 0.2)
        self.mapView.region = MKCoordinateRegionMake(center, span)
        //向地址增加标记
        let annotation = MKPointAnnotation()
        annotation.coordinate = center
        annotation.title = "当前大约位置"
        annotation.subtitle = ""
        self.mapView.addAnnotation(annotation)
        //创建一个新的圆形覆盖物
        let overlay = MKCircle(centerCoordinate: center, radius: 5000)
        self.mapView.addOverlay(overlay)
    }

    //自定义大头针样式,默认是红色
    //func mapView(mapView: MKMapView, viewForAnnotation annotation: MKAnnotation) -> MKAnnotationView? 
    //覆盖物的委托方法
    func mapView(mapView: MKMapView, rendererForOverlay overlay: MKOverlay) -> MKOverlayRenderer {
        
        let circleRenderer = MKCircleRenderer(overlay: overlay)
        circleRenderer.strokeColor = UIColor(red: 74/255, green: 144/255, blue: 226/255, alpha: 0.5)
        circleRenderer.fillColor = UIColor(red: 74/255, green: 144/255, blue: 226/255, alpha: 0.5)
        return circleRenderer
    }
}

当前位置实时显示

2.png

import MapKit

class MapViewController: UIViewController,MKMapViewDelegate {
    
    @IBOutlet weak var mapView: MKMapView!
    
    var spanState = true 

    override func viewDidLoad() {
        super.viewDidLoad()

        self.mapView.delegate = self
        self.mapView.showsUserLocation = true
    }
    
    func mapView(mapView: MKMapView, didUpdateUserLocation userLocation: MKUserLocation) {
        let coord = userLocation.coordinate
        let center = CLLocationCoordinate2DMake(coord.latitude, coord.longitude)
        print(center)
        
        if spanState == true { //首次时候的缩放范围
            let span = MKCoordinateSpanMake(0.01, 0.01)
            self.mapView.region = MKCoordinateRegionMake(center, span)
            spanState = !spanState
        }
    }
}