在地图上绘制多边形

import GoogleMaps import UIKit  final class PolygonsViewController: UIViewController {    private lazy var mapView: GMSMapView = {     let cameraPosition = GMSCameraPosition(latitude: 39.13006, longitude: -77.508545, zoom: 4)     return GMSMapView(frame: .zero, camera: cameraPosition)   }()    override func loadView() {     mapView.delegate = self     view = mapView   }    override func viewDidAppear(_ animated: Bool) {     super.viewDidAppear(animated)     // Create renderer related objects after view appears, so a renderer will be available;     let polygon = GMSPolygon()     polygon.path = GMSPath.newYorkState()     polygon.holes = [GMSPath.newYorkStateHole()]     polygon.title = "New York"     polygon.fillColor = UIColor(red: 0.25, green: 0, blue: 0, alpha: 0.2)     polygon.strokeColor = .black     polygon.strokeWidth = 2     polygon.isTappable = true     polygon.map = mapView      // Copy the existing polygon and its settings and use it as a base for the     // second polygon.     let carolina = polygon.copy() as! GMSPolygon     carolina.title = "North Carolina"     carolina.path = GMSPath.northCarolina()     carolina.fillColor = UIColor(red: 0, green: 0.25, blue: 0, alpha: 0.5)     carolina.map = mapView   } }  extension GMSPath {   static func newYorkState() -> GMSPath {     let data: [[CLLocationDegrees]] = [       [42.5142, -79.7624],       [42.7783, -79.0672],       [42.8508, -78.9313],       [42.9061, -78.9024],       [42.9554, -78.9313],       [42.9584, -78.9656],       [42.9886, -79.0219],       [43.0568, -79.0027],       [43.0769, -79.0727],       [43.1220, -79.0713],       [43.1441, -79.0302],       [43.1801, -79.0576],       [43.2482, -79.0604],       [43.2812, -79.0837],       [43.4509, -79.2004],       [43.6311, -78.6909],       [43.6321, -76.7958],       [43.9987, -76.4978],       [44.0965, -76.4388],       [44.1349, -76.3536],       [44.1989, -76.3124],       [44.2049, -76.2437],       [44.2413, -76.1655],       [44.2973, -76.1353],       [44.3327, -76.0474],       [44.3553, -75.9856],       [44.3749, -75.9196],       [44.3994, -75.8730],       [44.4308, -75.8221],       [44.4740, -75.8098],       [44.5425, -75.7288],       [44.6647, -75.5585],       [44.7672, -75.4088],       [44.8101, -75.3442],       [44.8383, -75.3058],       [44.8676, -75.2399],       [44.9211, -75.1204],       [44.9609, -74.9995],       [44.9803, -74.9899],       [44.9852, -74.9103],       [45.0017, -74.8856],       [45.0153, -74.8306],       [45.0046, -74.7633],       [45.0027, -74.7070],       [45.0007, -74.5642],       [44.9920, -74.1467],       [45.0037, -73.7306],       [45.0085, -73.4203],       [45.0109, -73.3430],       [44.9874, -73.3547],       [44.9648, -73.3379],       [44.9160, -73.3396],       [44.8354, -73.3739],       [44.8013, -73.3324],       [44.7419, -73.3667],       [44.6139, -73.3873],       [44.5787, -73.3736],       [44.4916, -73.3049],       [44.4289, -73.2953],       [44.3513, -73.3365],       [44.2757, -73.3118],       [44.1980, -73.3818],       [44.1142, -73.4079],       [44.0511, -73.4367],       [44.0165, -73.4065],       [43.9375, -73.4079],       [43.8771, -73.3749],       [43.8167, -73.3914],       [43.7790, -73.3557],       [43.6460, -73.4244],       [43.5893, -73.4340],       [43.5655, -73.3969],       [43.6112, -73.3818],       [43.6271, -73.3049],       [43.5764, -73.3063],       [43.5675, -73.2582],       [43.5227, -73.2445],       [43.2582, -73.2582],       [42.9715, -73.2733],       [42.8004, -73.2898],       [42.7460, -73.2664],       [42.4630, -73.3708],       [42.0840, -73.5095],       [42.0218, -73.4903],       [41.8808, -73.4999],       [41.2953, -73.5535],       [41.2128, -73.4834],       [41.1011, -73.7275],       [41.0237, -73.6644],       [40.9851, -73.6578],       [40.9509, -73.6132],       [41.1869, -72.4823],       [41.2551, -72.0950],       [41.3005, -71.9714],       [41.3108, -71.9193],       [41.1838, -71.7915],       [41.1249, -71.7929],       [41.0462, -71.7517],       [40.6306, -72.9465],       [40.5368, -73.4628],       [40.4887, -73.8885],       [40.5232, -73.9490],       [40.4772, -74.2271],       [40.4861, -74.2532],       [40.6468, -74.1866],       [40.6556, -74.0547],       [40.7618, -74.0156],       [40.8699, -73.9421],       [40.9980, -73.8934],       [41.0343, -73.9854],       [41.3268, -74.6274],       [41.3583, -74.7084],       [41.3811, -74.7101],       [41.4386, -74.8265],       [41.5075, -74.9913],       [41.6000, -75.0668],       [41.6719, -75.0366],       [41.7672, -75.0545],       [41.8808, -75.1945],       [42.0013, -75.3552],       [42.0003, -75.4266],       [42.0013, -77.0306],       [41.9993, -79.7250],       [42.0003, -79.7621],       [42.1827, -79.7621],       [42.5146, -79.7621],     ]     let path = GMSMutablePath()     for degrees in data {       path.addLatitude(degrees[0], longitude: degrees[1])     }     return path   }    static func newYorkStateHole() -> GMSPath {     let path = GMSMutablePath()     path.addLatitude(43.5000, longitude: -76.3651)     path.addLatitude(43.5000, longitude: -74.3651)     path.addLatitude(42.0000, longitude: -74.3651)     return path   }    static func northCarolina() -> GMSPath {     let path = GMSMutablePath()     let data = [       [33.7963, -78.4850],       [34.8037, -79.6742],       [34.8206, -80.8003],       [34.9377, -80.7880],       [35.1019, -80.9377],       [35.0356, -81.0379],       [35.1457, -81.0324],       [35.1660, -81.3867],       [35.1985, -82.2739],       [35.2041, -82.3933],       [35.0637, -82.7765],       [35.0817, -82.7861],       [34.9996, -83.1075],       [34.9918, -83.6183],       [34.9918, -84.3201],       [35.2131, -84.2885],       [35.2680, -84.2226],       [35.2310, -84.1113],       [35.2815, -84.0454],       [35.4058, -84.0248],       [35.4719, -83.9424],       [35.5166, -83.8559],       [35.5512, -83.6938],       [35.5680, -83.5181],       [35.6327, -83.3849],       [35.7142, -83.2475],       [35.7799, -82.9962],       [35.8445, -82.9276],       [35.9224, -82.8191],       [35.9958, -82.7710],       [36.0613, -82.6419],       [35.9702, -82.6103],       [35.9547, -82.5677],       [36.0236, -82.4730],       [36.0669, -82.4194],       [36.1168, -82.3535],       [36.1345, -82.2862],       [36.1467, -82.1461],       [36.1035, -82.1228],       [36.1268, -82.0267],       [36.2797, -81.9360],       [36.3527, -81.7987],       [36.3361, -81.7081],       [36.5880, -81.6724],       [36.5659, -80.7234],       [36.5438, -80.2977],       [36.5449, -79.6729],       [36.5449, -77.2559],       [36.5505, -75.7562],       [36.3129, -75.7068],       [35.7131, -75.4129],       [35.2041, -75.4720],       [34.9794, -76.0748],       [34.5258, -76.4951],       [34.5880, -76.8109],       [34.5314, -77.1378],       [34.3910, -77.4481],       [34.0481, -77.7983],       [33.7666, -77.9260],       [33.7963, -78.4863],     ]     for degrees in data {       path.addLatitude(degrees[0], longitude: degrees[1])     }     return path   } }  extension PolygonsViewController: GMSMapViewDelegate {   func mapView(_ mapView: GMSMapView, didTap overlay: GMSOverlay) {     // When a polygon is tapped, randomly change its fill color to a new hue.     guard let polygon = overlay as? GMSPolygon else { return }     polygon.fillColor = UIColor(       hue: CGFloat.random(in: 0..<1), saturation: 1, brightness: 1, alpha: 0.5)   } }
PolygonsViewController.swift
       

#import "GoogleMapsDemos/Samples/PolygonsViewController.h"  #import <GoogleMaps/GoogleMaps.h>  @interface PolygonsViewController ()  @property(nonatomic) GMSPolygon *polygonOfNewYork; @property(nonatomic) GMSPolygon *polygonOfNorthCarolina;  @end  @implementation PolygonsViewController  - (void)viewDidLoad {   [super viewDidLoad];   GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:39.13006                                                           longitude:-77.508545                                                                zoom:4];   GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];   mapView.delegate = self;  // needed for didTapOverlay delegate method    self.view = mapView; }  - (void)viewDidAppear:(BOOL)animated {   [super viewDidAppear:animated];    // Create renderer related objects after view appears, so a renderer will be available; otherwise,   // behavior is undefined (may result in null ptr derefs).   GMSMapView *mapView = (GMSMapView *)self.view;    // Create the first polygon.   GMSPolygon *polygon = [[GMSPolygon alloc] init];   polygon.path = [self pathOfNewYorkState];   polygon.holes = @[ [self pathOfNewYorkStateHole] ];   polygon.title = @"New York";   polygon.fillColor = [UIColor colorWithRed:0.25 green:0 blue:0 alpha:0.2f];   polygon.strokeColor = [UIColor blackColor];   polygon.strokeWidth = 2;   polygon.tappable = YES;   polygon.map = mapView;   self.polygonOfNewYork = polygon;    // Copy the existing polygon and its settings and use it as a base for the second polygon.   polygon = [polygon copy];   polygon.title = @"North Carolina";   polygon.path = [self pathOfNorthCarolina];   polygon.fillColor = [UIColor colorWithRed:0 green:0.25 blue:0 alpha:0.5];   polygon.map = mapView;   self.polygonOfNorthCarolina = polygon; }  - (void)mapView:(GMSMapView *)mapView didTapOverlay:(GMSOverlay *)overlay {   // When a polygon is tapped, randomly change its fill color to a new hue.   if ([overlay isKindOfClass:[GMSPolygon class]]) {     GMSPolygon *polygon = (GMSPolygon *)overlay;     CGFloat hue = (((float)arc4random() / 0x100000000) * 1.0f);     polygon.fillColor = [UIColor colorWithHue:hue saturation:1 brightness:1 alpha:0.5];   } }  - (GMSPath *)pathOfNewYorkState {   GMSMutablePath *path = [GMSMutablePath path];   [path addLatitude:42.5142 longitude:-79.7624];   [path addLatitude:42.7783 longitude:-79.0672];   [path addLatitude:42.8508 longitude:-78.9313];   [path addLatitude:42.9061 longitude:-78.9024];   [path addLatitude:42.9554 longitude:-78.9313];   [path addLatitude:42.9584 longitude:-78.9656];   [path addLatitude:42.9886 longitude:-79.0219];   [path addLatitude:43.0568 longitude:-79.0027];   [path addLatitude:43.0769 longitude:-79.0727];   [path addLatitude:43.1220 longitude:-79.0713];   [path addLatitude:43.1441 longitude:-79.0302];   [path addLatitude:43.1801 longitude:-79.0576];   [path addLatitude:43.2482 longitude:-79.0604];   [path addLatitude:43.2812 longitude:-79.0837];   [path addLatitude:43.4509 longitude:-79.2004];   [path addLatitude:43.6311 longitude:-78.6909];   [path addLatitude:43.6321 longitude:-76.7958];   [path addLatitude:43.9987 longitude:-76.4978];   [path addLatitude:44.0965 longitude:-76.4388];   [path addLatitude:44.1349 longitude:-76.3536];   [path addLatitude:44.1989 longitude:-76.3124];   [path addLatitude:44.2049 longitude:-76.2437];   [path addLatitude:44.2413 longitude:-76.1655];   [path addLatitude:44.2973 longitude:-76.1353];   [path addLatitude:44.3327 longitude:-76.0474];   [path addLatitude:44.3553 longitude:-75.9856];   [path addLatitude:44.3749 longitude:-75.9196];   [path addLatitude:44.3994 longitude:-75.8730];   [path addLatitude:44.4308 longitude:-75.8221];   [path addLatitude:44.4740 longitude:-75.8098];   [path addLatitude:44.5425 longitude:-75.7288];   [path addLatitude:44.6647 longitude:-75.5585];   [path addLatitude:44.7672 longitude:-75.4088];   [path addLatitude:44.8101 longitude:-75.3442];   [path addLatitude:44.8383 longitude:-75.3058];   [path addLatitude:44.8676 longitude:-75.2399];   [path addLatitude:44.9211 longitude:-75.1204];   [path addLatitude:44.9609 longitude:-74.9995];   [path addLatitude:44.9803 longitude:-74.9899];   [path addLatitude:44.9852 longitude:-74.9103];   [path addLatitude:45.0017 longitude:-74.8856];   [path addLatitude:45.0153 longitude:-74.8306];   [path addLatitude:45.0046 longitude:-74.7633];   [path addLatitude:45.0027 longitude:-74.7070];   [path addLatitude:45.0007 longitude:-74.5642];   [path addLatitude:44.9920 longitude:-74.1467];   [path addLatitude:45.0037 longitude:-73.7306];   [path addLatitude:45.0085 longitude:-73.4203];   [path addLatitude:45.0109 longitude:-73.3430];   [path addLatitude:44.9874 longitude:-73.3547];   [path addLatitude:44.9648 longitude:-73.3379];   [path addLatitude:44.9160 longitude:-73.3396];   [path addLatitude:44.8354 longitude:-73.3739];   [path addLatitude:44.8013 longitude:-73.3324];   [path addLatitude:44.7419 longitude:-73.3667];   [path addLatitude:44.6139 longitude:-73.3873];   [path addLatitude:44.5787 longitude:-73.3736];   [path addLatitude:44.4916 longitude:-73.3049];   [path addLatitude:44.4289 longitude:-73.2953];   [path addLatitude:44.3513 longitude:-73.3365];   [path addLatitude:44.2757 longitude:-73.3118];   [path addLatitude:44.1980 longitude:-73.3818];   [path addLatitude:44.1142 longitude:-73.4079];   [path addLatitude:44.0511 longitude:-73.4367];   [path addLatitude:44.0165 longitude:-73.4065];   [path addLatitude:43.9375 longitude:-73.4079];   [path addLatitude:43.8771 longitude:-73.3749];   [path addLatitude:43.8167 longitude:-73.3914];   [path addLatitude:43.7790 longitude:-73.3557];   [path addLatitude:43.6460 longitude:-73.4244];   [path addLatitude:43.5893 longitude:-73.4340];   [path addLatitude:43.5655 longitude:-73.3969];   [path addLatitude:43.6112 longitude:-73.3818];   [path addLatitude:43.6271 longitude:-73.3049];   [path addLatitude:43.5764 longitude:-73.3063];   [path addLatitude:43.5675 longitude:-73.2582];   [path addLatitude:43.5227 longitude:-73.2445];   [path addLatitude:43.2582 longitude:-73.2582];   [path addLatitude:42.9715 longitude:-73.2733];   [path addLatitude:42.8004 longitude:-73.2898];   [path addLatitude:42.7460 longitude:-73.2664];   [path addLatitude:42.4630 longitude:-73.3708];   [path addLatitude:42.0840 longitude:-73.5095];   [path addLatitude:42.0218 longitude:-73.4903];   [path addLatitude:41.8808 longitude:-73.4999];   [path addLatitude:41.2953 longitude:-73.5535];   [path addLatitude:41.2128 longitude:-73.4834];   [path addLatitude:41.1011 longitude:-73.7275];   [path addLatitude:41.0237 longitude:-73.6644];   [path addLatitude:40.9851 longitude:-73.6578];   [path addLatitude:40.9509 longitude:-73.6132];   [path addLatitude:41.1869 longitude:-72.4823];   [path addLatitude:41.2551 longitude:-72.0950];   [path addLatitude:41.3005 longitude:-71.9714];   [path addLatitude:41.3108 longitude:-71.9193];   [path addLatitude:41.1838 longitude:-71.7915];   [path addLatitude:41.1249 longitude:-71.7929];   [path addLatitude:41.0462 longitude:-71.7517];   [path addLatitude:40.6306 longitude:-72.9465];   [path addLatitude:40.5368 longitude:-73.4628];   [path addLatitude:40.4887 longitude:-73.8885];   [path addLatitude:40.5232 longitude:-73.9490];   [path addLatitude:40.4772 longitude:-74.2271];   [path addLatitude:40.4861 longitude:-74.2532];   [path addLatitude:40.6468 longitude:-74.1866];   [path addLatitude:40.6556 longitude:-74.0547];   [path addLatitude:40.7618 longitude:-74.0156];   [path addLatitude:40.8699 longitude:-73.9421];   [path addLatitude:40.9980 longitude:-73.8934];   [path addLatitude:41.0343 longitude:-73.9854];   [path addLatitude:41.3268 longitude:-74.6274];   [path addLatitude:41.3583 longitude:-74.7084];   [path addLatitude:41.3811 longitude:-74.7101];   [path addLatitude:41.4386 longitude:-74.8265];   [path addLatitude:41.5075 longitude:-74.9913];   [path addLatitude:41.6000 longitude:-75.0668];   [path addLatitude:41.6719 longitude:-75.0366];   [path addLatitude:41.7672 longitude:-75.0545];   [path addLatitude:41.8808 longitude:-75.1945];   [path addLatitude:42.0013 longitude:-75.3552];   [path addLatitude:42.0003 longitude:-75.4266];   [path addLatitude:42.0013 longitude:-77.0306];   [path addLatitude:41.9993 longitude:-79.7250];   [path addLatitude:42.0003 longitude:-79.7621];   [path addLatitude:42.1827 longitude:-79.7621];   [path addLatitude:42.5146 longitude:-79.7621];   return path; }  - (GMSPath *)pathOfNewYorkStateHole {   GMSMutablePath *path = [GMSMutablePath path];   [path addLatitude:43.5000 longitude:-76.3651];   [path addLatitude:43.5000 longitude:-74.3651];   [path addLatitude:42.0000 longitude:-74.3651];   return path; }  - (GMSPath *)pathOfNorthCarolina {   GMSMutablePath *path = [GMSMutablePath path];   [path addLatitude:33.7963 longitude:-78.4850];   [path addLatitude:34.8037 longitude:-79.6742];   [path addLatitude:34.8206 longitude:-80.8003];   [path addLatitude:34.9377 longitude:-80.7880];   [path addLatitude:35.1019 longitude:-80.9377];   [path addLatitude:35.0356 longitude:-81.0379];   [path addLatitude:35.1457 longitude:-81.0324];   [path addLatitude:35.1660 longitude:-81.3867];   [path addLatitude:35.1985 longitude:-82.2739];   [path addLatitude:35.2041 longitude:-82.3933];   [path addLatitude:35.0637 longitude:-82.7765];   [path addLatitude:35.0817 longitude:-82.7861];   [path addLatitude:34.9996 longitude:-83.1075];   [path addLatitude:34.9918 longitude:-83.6183];   [path addLatitude:34.9918 longitude:-84.3201];   [path addLatitude:35.2131 longitude:-84.2885];   [path addLatitude:35.2680 longitude:-84.2226];   [path addLatitude:35.2310 longitude:-84.1113];   [path addLatitude:35.2815 longitude:-84.0454];   [path addLatitude:35.4058 longitude:-84.0248];   [path addLatitude:35.4719 longitude:-83.9424];   [path addLatitude:35.5166 longitude:-83.8559];   [path addLatitude:35.5512 longitude:-83.6938];   [path addLatitude:35.5680 longitude:-83.5181];   [path addLatitude:35.6327 longitude:-83.3849];   [path addLatitude:35.7142 longitude:-83.2475];   [path addLatitude:35.7799 longitude:-82.9962];   [path addLatitude:35.8445 longitude:-82.9276];   [path addLatitude:35.9224 longitude:-82.8191];   [path addLatitude:35.9958 longitude:-82.7710];   [path addLatitude:36.0613 longitude:-82.6419];   [path addLatitude:35.9702 longitude:-82.6103];   [path addLatitude:35.9547 longitude:-82.5677];   [path addLatitude:36.0236 longitude:-82.4730];   [path addLatitude:36.0669 longitude:-82.4194];   [path addLatitude:36.1168 longitude:-82.3535];   [path addLatitude:36.1345 longitude:-82.2862];   [path addLatitude:36.1467 longitude:-82.1461];   [path addLatitude:36.1035 longitude:-82.1228];   [path addLatitude:36.1268 longitude:-82.0267];   [path addLatitude:36.2797 longitude:-81.9360];   [path addLatitude:36.3527 longitude:-81.7987];   [path addLatitude:36.3361 longitude:-81.7081];   [path addLatitude:36.5880 longitude:-81.6724];   [path addLatitude:36.5659 longitude:-80.7234];   [path addLatitude:36.5438 longitude:-80.2977];   [path addLatitude:36.5449 longitude:-79.6729];   [path addLatitude:36.5449 longitude:-77.2559];   [path addLatitude:36.5505 longitude:-75.7562];   [path addLatitude:36.3129 longitude:-75.7068];   [path addLatitude:35.7131 longitude:-75.4129];   [path addLatitude:35.2041 longitude:-75.4720];   [path addLatitude:34.9794 longitude:-76.0748];   [path addLatitude:34.5258 longitude:-76.4951];   [path addLatitude:34.5880 longitude:-76.8109];   [path addLatitude:34.5314 longitude:-77.1378];   [path addLatitude:34.3910 longitude:-77.4481];   [path addLatitude:34.0481 longitude:-77.7983];   [path addLatitude:33.7666 longitude:-77.9260];   [path addLatitude:33.7963 longitude:-78.4863];   return path; }  @end
PolygonsViewController.m