对位置进行反向地理编码

import GoogleMaps import UIKit  // Sample code for GeoCoder service. class GeocoderViewController: UIViewController {    private lazy var mapView: GMSMapView = {     let camera = GMSCameraPosition(latitude: -33.868, longitude: 151.2086, zoom: 12)     return GMSMapView(frame: .zero, camera: camera)   }()    private lazy var geocoder = GMSGeocoder()    override func loadView() {     view = mapView     mapView.delegate = self   } }  extension GeocoderViewController: GMSMapViewDelegate {   func mapView(_ mapView: GMSMapView, didLongPressAt coordinate: CLLocationCoordinate2D) {     // On a long press, reverse geocode this location.     geocoder.reverseGeocodeCoordinate(coordinate) { response, error in       guard let address = response?.firstResult() else {         let errorMessage = error.map { String(describing: $0) } ?? "<no error>"         print(           "Could not reverse geocode point (\(coordinate.latitude), \(coordinate.longitude)): \(errorMessage)"         )         return       }       print("Geocoder result: \(address)")       let marker = GMSMarker(position: address.coordinate)       marker.appearAnimation = .pop       marker.map = mapView        guard let lines = address.lines, let title = lines.first else { return }       marker.title = title       if lines.count > 1 {         marker.snippet = lines[1]       }     }   } }
GeocoderViewController.swift
       

#import "GoogleMapsDemos/Samples/GeocoderViewController.h"  #import <GoogleMaps/GoogleMaps.h>  @implementation GeocoderViewController {   GMSMapView *_mapView;   GMSGeocoder *_geocoder; }  - (void)viewDidLoad {   [super viewDidLoad];   GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.868                                                           longitude:151.2086                                                                zoom:12];    _mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];   _mapView.delegate = self;    _geocoder = [[GMSGeocoder alloc] init];    self.view = _mapView; }  - (void)mapView:(GMSMapView *)mapView didLongPressAtCoordinate:(CLLocationCoordinate2D)coordinate {   // On a long press, reverse geocode this location.   __weak __typeof__(self) weakSelf = self;   GMSReverseGeocodeCallback handler = ^(GMSReverseGeocodeResponse *response, NSError *error) {     [weakSelf handleResponse:response coordinate:coordinate error:error];   };   [_geocoder reverseGeocodeCoordinate:coordinate completionHandler:handler]; }  - (void)handleResponse:(nullable GMSReverseGeocodeResponse *)response             coordinate:(CLLocationCoordinate2D)coordinate                  error:(nullable NSError *)error {   GMSAddress *address = response.firstResult;   if (address) {     NSLog(@"Geocoder result: %@", address);      GMSMarker *marker = [GMSMarker markerWithPosition:address.coordinate];     NSArray<NSString *> *lines = [address lines];      marker.title = [lines firstObject];     if (lines.count > 1) {       marker.snippet = [lines objectAtIndex:1];     }      marker.appearAnimation = kGMSMarkerAnimationPop;     marker.map = _mapView;   } else {     NSLog(@"Could not reverse geocode point (%f,%f): %@", coordinate.latitude, coordinate.longitude,           error);   } }  @end
GeocoderViewController.m