swift地图定位(十五)使用MKUserTrackingBarButtonItem

    xiaoxiao2021-12-12  4

    准备:在控制器上嵌入一个Navigation Controller,在viewDidLoad中加入下面两句

            let item = MKUserTrackingBarButtonItem(mapView: mapView)

            navigationItem.leftBarButtonItem = item

    import UIKit import MapKit class ViewController: UIViewController { @IBOutlet weak var mapView: MKMapView! lazy var locationM: CLLocationManager = { let locationM = CLLocationManager() if #available(iOS 8.0, *) { locationM.requestAlwaysAuthorization() } return locationM }() lazy var geoCoder: CLGeocoder = { return CLGeocoder() }() override func viewDidLoad() { super.viewDidLoad() mapView.delegate = self mapView.userTrackingMode = MKUserTrackingMode.followWithHeading _ = locationM let item = MKUserTrackingBarButtonItem(mapView: mapView) navigationItem.leftBarButtonItem = item } override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?){ let point = touches.first?.location(in: mapView) let coordinate = mapView.convert(point!, toCoordinateFrom: mapView) let annotation = addAnnotation(coordinate, title: "title", subTitle: "subTitle") let location = CLLocation(latitude: coordinate.latitude, longitude: coordinate.longitude) geoCoder.reverseGeocodeLocation(location) { (pls: [CLPlacemark]?, error: Error?) -> Void in if error == nil { let pl = pls?.first print(pl) annotation.title = pl?.locality annotation.subtitle = pl?.name } } } func addAnnotation(_ coordinate: CLLocationCoordinate2D, title: String, subTitle: String) -> TGAnnotation { let annotation: TGAnnotation = TGAnnotation() annotation.coordinate = coordinate annotation.title = title annotation.subtitle = subTitle mapView.addAnnotation(annotation) return annotation } } class TGAnnotation: NSObject, MKAnnotation { var coordinate: CLLocationCoordinate2D = CLLocationCoordinate2DMake(0, 0) var title: String? var subtitle: String? } extension ViewController: MKMapViewDelegate { func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) { let annotation = view.annotation if #available(iOS 9.0, *) { (view.detailCalloutAccessoryView as! UILabel).text = (annotation?.subtitle)! } print("选中了\(annotation?.subtitle)") } func mapView(_ mapView: MKMapView, didDeselect view: MKAnnotationView) { let annotation = view.annotation print("取消选中了\(annotation?.subtitle)") } func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? { let iden = "item" var annotationView = mapView.dequeueReusableAnnotationView(withIdentifier: iden) if annotationView == nil { annotationView = MKAnnotationView(annotation: annotation, reuseIdentifier: iden) } annotationView?.annotation = annotation annotationView?.image = UIImage(named: "category_1") annotationView?.centerOffset = CGPoint(x: 0, y: 0) annotationView?.canShowCallout = true annotationView?.calloutOffset = CGPoint(x: -10, y: 10) let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40)) let image = UIImage(named: "category_2") imageView.image = image annotationView?.leftCalloutAccessoryView = imageView let imageView2 = UIImageView(frame: CGRect(x: 0, y: 0, width: 40, height: 40)) let image2 = UIImage(named: "category_3") imageView2.image = image2 annotationView?.rightCalloutAccessoryView = imageView2 if #available(iOS 9.0, *) { let detailLabel : UILabel = UILabel() detailLabel.frame = CGRect(x: 0, y: 0, width: 100, height: 40) detailLabel.numberOfLines = 0 annotationView?.detailCalloutAccessoryView = detailLabel } annotationView?.isDraggable = true return annotationView } }

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