swift地图定位（十六）poi及其他

import UIKitimport MapKitclass ViewController: UIViewController {    @IBOutlet weak var mapView: MKMapView!        lazy var locationM: CLLocationManager = {        let locationM = CLLocationManager()        if #available(iOS 8.0, *) {            locationM.requestAlwaysAuthorization()        }        return locationM    }()        override func viewDidLoad() {        super.viewDidLoad()        mapView.delegate = self        mapView.userTrackingMode = MKUserTrackingMode.followWithHeading        _ = locationM    }        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    }        override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {//        camera()//        snap()        poi()    }        func poi(){        let request: MKLocalSearchRequest = MKLocalSearchRequest()        request.naturalLanguageQuery = "小吃"        request.region = mapView.region        let search: MKLocalSearch = MKLocalSearch(request: request)        search.start { (response: MKLocalSearchResponse?, error: Error?)  in            if error == nil {                let items = response!.mapItems                for item in items {                    self.addAnnotation(item.placemark.coordinate, title: item.name ?? "", subTitle:item.phoneNumber ?? "")                    print(item.name ?? "")                }            }        }    }        func snap() {        let option: MKMapSnapshotOptions = MKMapSnapshotOptions()        option.region = mapView.region        option.mapType = .satellite                option.size = CGSize(width: 1000, height: 1000)        let snapShoter = MKMapSnapshotter(options: option)        snapShoter.start { (shot: MKMapSnapshot?, error: Error?) in            if error == nil {                let image = shot?.image                let data = UIImagePNGRepresentation(image!)                try? data?.write(to: URL(fileURLWithPath: "/Users/targetcloud/Desktop/snap.png"), options: [.atomic])            }        }    }        func camera() {//3D视图        let center = mapView.centerCoordinate        // 参数: 需要看的位置、 从哪个地方看、 站多高看        let camera: MKMapCamera = MKMapCamera(lookingAtCenter: center, fromEyeCoordinate: CLLocationCoordinate2DMake(center.latitude, center.longitude + 0.1), eyeAltitude: 500)        mapView.setCamera(camera, animated: true)    }}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)                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    }}