IOS：使用谷歌地图绘制最佳路线路径

Question

我已经将我的 IOS 应用程序与谷歌地图集成。我需要使用谷歌地图绘制从我当前位置到某个（XYZ）目的地的最佳路线路径（更短的距离）。而且我还需要那种交通工具（比如：开车、步行、交通工具）

有人可以帮我做这件事吗？任何框架在两点之间画线（最佳路径绘制）并在我点击驱动器时导航该路径（每 2 秒更新一次路径）

Answer 1

第一步

向 Google 路线API 发送URL request。

第 2 步

当您收到JSON file 时，请完成所有步骤。

第 3 步

解码点对象。

---

首先获取您路线上的所有点坐标，然后在路径中添加这些点（这些点的纬度和经度），您可以根据该点绘制路径...试试这个：

GMSCameraPosition *position=[GMSCameraPosition cameraWithLatitude:15.5203 longitude:68.8567 zoom:10];
_mView =[GMSMapView mapWithFrame:CGRectZero camera:position];
_mView.myLocationEnabled=YES;
GMSMarker *marker=[[GMSMarker alloc]init];
marker.position=CLLocationCoordinate2DMake(15.5203, 68.8567);
marker.icon=[UIImage imageNamed:@"a.png"] ;
marker.groundAnchor=CGPointMake(0.5,0.5);
marker.map=_mView;
GMSMutablePath *path = [GMSMutablePath path];   
[path addCoordinate:CLLocationCoordinate2DMake(@(15.520).doubleValue,@(68.856).doubleValue)];
[path addCoordinate:CLLocationCoordinate2DMake(@(15.7).doubleValue,@(73.8567).doubleValue)];

GMSPolyline *rect = [GMSPolyline polylineWithPath:path];
rect.strokeWidth = 2.f;
rect.map = _mView;
self.view=_mView;

---

更新

    NSString *urlString = [NSString stringWithFormat:
                       @"%@?origin=%f,%f&destination=%f,%f&sensor=true&key=%@",
                       @"https://maps.googleapis.com/maps/api/directions/json",
                       mapView.myLocation.coordinate.latitude,
                       mapView.myLocation.coordinate.longitude,
                       destLatitude,
                       destLongitude,
                       @"Enter Google API String Here"];
NSURL *directionsURL = [NSURL URLWithString:urlString];


ASIHTTPRequest *req = [ASIHTTPRequest requestWithURL:directionsURL];
[req startSynchronous];
NSError *error = [req error];
if (!error) {
    NSString *response = [req responseString];
    NSLog(@"%@",response);
    NSDictionary *json =[NSJSONSerialization JSONObjectWithData:[req responseData] options:NSJSONReadingMutableContainers error:&error];
    GMSPath *path =[GMSPath pathFromEncodedPath:json[@"routes"][0][@"overview_polyline"][@"points"]];
    GMSPolyline *singleLine = [GMSPolyline polylineWithPath:path];
    singleLine.strokeWidth = 7;
    singleLine.strokeColor = [UIColor greenColor];
    singleLine.map = self.mapView;
}
else NSLog(@"%@",[req error]);

Answer 2

希望对你有帮助

NSString *originString = [NSString stringWithFormat:@"%f,%f", origin.coordinate.latitude, origin.coordinate.longitude];
    NSString *destinationString = [NSString stringWithFormat:@"%f,%f", destination.coordinate.latitude, destination.coordinate.longitude];
    NSString *directionsAPI = @"https://maps.googleapis.com/maps/api/directions/json?";
    NSString *directionsUrlString = [NSString stringWithFormat:@"%@&origin=%@&destination=%@&mode=driving", directionsAPI, originString, destinationString];
    NSURL *directionsUrl = [NSURL URLWithString:directionsUrlString];


    NSURLSessionDataTask *fetchDirectionsTask = [[NSURLSession sharedSession] dataTaskWithURL:directionsUrl completionHandler:
                                                 ^(NSData *data, NSURLResponse *response, NSError *error)
                                                 {
                                                     NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
                                                     if(error)
                                                     {
                                                         if(completionHandler)
                                                             completionHandler(nil);
                                                         return;
                                                     }

                                                     NSArray *routesArray = [json objectForKey:@"routes"];

                                                     GMSPolyline *polyline = nil;
                                                     if ([routesArray count] > 0)
                                                     {
                                                         dispatch_async(dispatch_get_main_queue(), ^{
                                                         NSDictionary *routeDict = [routesArray objectAtIndex:0];
                                                         NSDictionary *routeOverviewPolyline = [routeDict objectForKey:@"overview_polyline"];
                                                         NSString *points = [routeOverviewPolyline objectForKey:@"points"];
                                                 GMSPolyline *polyline = [GMSPolyline polylineWithPath: [GMSPath pathFromEncodedPath: points]];
                                                         polyline.map = _mView;
                                                         polyline.strokeColor = [UIColor colorWithRed:0/255.0 green:4/255.0 blue:255/255.0 alpha:1.0];
                                                         polyline.strokeWidth = 4.0f;
                                                             });
                                                         };


                                                     if(completionHandler)
                                                         completionHandler(polyline);
                                                 }];
    [fetchDirectionsTask resume];
}