MapViewでGMSPolylineを描画する方法

Question

マップベースのアプリケーションを作成しました。今Googleの方向apiによってPolyLineポイントを取得しました。しかし、これでポリラインを描く方法はGSMPathです。私は何回も試みましたが、ポリラインを描画するのはGMSMapViewです。描く方法をお勧めします。 どちらの方法を参考にしてください。

-(void) viewWillAppear:(BOOL)animated 
{ 
NSString *urlString = [NSString stringWithFormat: 
         @"%@?origin=%f,%f&destination=%f,%f&sensor=true&key=%@", 
         @"https://maps.googleapis.com/maps/api/directions/json", 
         22.6987, 
         75.8817, 
         22.6990, 
         75.8671, 
         @"AIzaSyCk6NNWO7DxVUEyEW1B6m-YNpdqv5HbyEk"]; 
NSCharacterSet *set = [NSCharacterSet URLQueryAllowedCharacterSet]; 
NSString *encodedUrlAsString = [urlString stringByAddingPercentEncodingWithAllowedCharacters:set]; 

NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]]; 

[[session dataTaskWithURL:[NSURL URLWithString:encodedUrlAsString] 
     completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { 

      NSLog(@"RESPONSE: %@",response); 
      NSString *resSrt = [[NSString alloc]initWithData:data encoding:NSASCIIStringEncoding]; 
      NSLog(@"DATA: %@",resSrt); 

      if (!error) { 
      // Success 
      if ([response isKindOfClass:[NSHTTPURLResponse class]]) { 
      NSError *jsonError; 
      json =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&jsonError]; 
     dispatch_sync(dispatch_get_main_queue(), ^{ 

       NSArray *routesArray = [json objectForKey:@"routes"]; 
       NSLog(@"succes===== %@",routesArray); 
       GMSPolyline *polyline = nil; 

       if ([routesArray count] > 0) 
       { 
       NSDictionary *routeDict = [routesArray objectAtIndex:0]; 
      NSDictionary *routeOverviewPolyline = [routeDict objectForKey:@"overview_polyline"]; 
      points = [routeOverviewPolyline objectForKey:@"points"]; 
      NSLog(@"points ==== %@",points); 



      GMSPath *path = [GMSPath pathFromEncodedPath:points]; 
      polyline = [GMSPolyline polylineWithPath:path]; 
      GMSPolyline *polyline = [GMSPolyline polylineWithPath:path]; 
      polyline.strokeWidth = 5; 
      polyline.strokeColor=[UIColor redColor]; 
      polyline.map = self.map_view; 
      } 
       else 
      { 

      } 
       }); 

      } 
      else { 
        //Web server is returning an error 
       } 
      } 

      else { 
       // Fail 
       NSLog(@"error : %@", error.description); 
      } 

     }] resume]; 

     } 

polyline.map = self.map_view; このコードでは、次の行でエラー表示

後に使用されるものコードがコメントした後、エラーを実行していません。 この行はコメントなしで実行してエラーを表示します。 -[MKMapView updateOverlay:]

ナビゲータ問題：この行では 'MKMapView *' から 'GMSMapView * _Nullable' に

を割り当てるpolyline.map = self.map_view; 互換性のないポインタ型はポリラインを描画する方法を提案してください。ありがとう

Answer 1

このコードを使用してください。それは私のためにうまくいく。

-(void)setMapDataValue 
    { 
     [googleMapView clear]; 
     NSString *strUrl = [self getDirectionsUrl]; 
     [self serviceCalledToGetRouteFromCoordinate:strUrl]; 
    } 

-(NSString*)getDirectionsUrl{ 

    // Origin of route 
    NSString *str_origin = [NSString stringWithFormat:@"origin=%f,%f",sourcePosition.latitude, sourcePosition.longitude]; 

    // Destination of route 
    NSString *str_dest = [NSString stringWithFormat:@"destination=%f,%f",destinationPosition.latitude, destinationPosition.longitude]; 

    // Sensor enabled 
    NSString *sensor = @"sensor=false"; 

    // Building the parameters to the web service 
    NSString *parameters = [NSString stringWithFormat:@"%@&%@&%@",str_origin,str_dest,sensor]; 

    // Output format 
    NSString *output = @"json"; 

    NSString *url = [NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/directions/%@?%@",output,parameters]; 

    return url; 
} 

-(void)serviceCalledToGetRouteFromCoordinate:(NSString *)strUrl 
{ 
    if([[AFNetworkReachabilityManager sharedManager] isReachable]) 
    { 
     DLog(@"URL: %@", strUrl); 

     AFHTTPSessionManager *manager = [AFHTTPSessionManager manager]; 

     [manager.operationQueue cancelAllOperations]; 

     [manager GET:strUrl parameters:nil progress:nil success:^(NSURLSessionTask *task, id responseObject) 
     { 
      if([[responseObject[@"status"] lowercaseString] isEqualToString:@"ok"] && [responseObject[@"routes"] count]>0) 
      { 
       arrLocation = responseObject[@"routes"][0][@"legs"][0][@"steps"]; 
      } 
      [self setMapView]; 
     } 
      failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) 
     { 
      DLog(@"Error: %@", error); 
     }]; 
    } 
    else 
    { 
     [self.view endEditing:YES]; 
     [Utility displayAlertWithTitle:NSLocalizedString(@"no_internet_connection", nil) andMessage:NSLocalizedString(@"internet_appears_offline", nil)]; 
    } 
} 

-(void)setMapView 
{ 
    if (arrLocation.count > 0) { 
     sourcePosition.latitude = [[[[arrLocation objectAtIndex:0] valueForKey:@"start_location"] valueForKey:@"lat"] floatValue]; 
     sourcePosition.longitude = [[[[arrLocation objectAtIndex:0] valueForKey:@"start_location"] valueForKey:@"lng"] floatValue]; 

     destinationPosition.latitude = [[[[arrLocation objectAtIndex:arrLocation.count-1] valueForKey:@"end_location"] valueForKey:@"lat"] floatValue]; 
     destinationPosition.longitude = [[[[arrLocation objectAtIndex:arrLocation.count-1] valueForKey:@"end_location"] valueForKey:@"lng"] floatValue]; 
    } 

    [self setAnnotationInMapview:sourcePosition.latitude longitude:sourcePosition.longitude pinImgName:@"ic_loc_pin_red"]; 
    [self setAnnotationInMapview:destinationPosition.latitude longitude:destinationPosition.longitude pinImgName:@"ic_loc_pin_green"]; 


    if (arrLocation.count == 0) 
    { 
     GMSMutablePath *path = [GMSMutablePath path]; 
     [path addCoordinate:CLLocationCoordinate2DMake(sourcePosition.latitude,sourcePosition.longitude)]; 
     [path addCoordinate:CLLocationCoordinate2DMake(destinationPosition.latitude,destinationPosition.longitude)]; 

     GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path]; 
     //  rectangle.strokeWidth = 2.f; 
     rectangle.map = googleMapView; 
    } 
    else 
    { 
     for (int i = 0; i<arrLocation.count; i++) 
     { 
      NSString *strPolyline = arrLocation[i][@"polyline"][@"points"]; 
      GMSPolyline *polyline = [self polylineWithEncodedString:strPolyline]; 
      // Add the polyline to the map. 
      //  polyline.strokeColor = [UIColor redColor]; 
      //  polyline.strokeWidth = 2.f; 
      polyline.map = googleMapView; 
     } 
    } 


} 

-(void)setAnnotationInMapview:(float)newLatitude longitude:(float)newLongitude pinImgName:(NSString *)pinImgName 
{ 
    CLLocationCoordinate2D position = CLLocationCoordinate2DMake(newLatitude, newLongitude); 
    GMSMarker *marker = [GMSMarker markerWithPosition:position]; 
    marker.icon = [UIImage imageNamed:pinImgName]; 
    [marker setDraggable: YES]; 
    marker.map = googleMapView; 
} 

Answer 2

チェックself.map_viewの種類がGMSMapViewであるかどうか？