我已经创建了一个基于地图的应用程序。现在通过google方向API获取PolyLine点。但是如何用这个GSMPath来画多边线。我尝试了很多次，但没有在GMSMapView中绘制polyLine。如何画请提出建议。使用哪种方法请引导。如何在MapView中绘制GMSPolyline

-(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]; 

     }

后错误显示

使用这种代码，并在此行polyline.map = self.map_view; 该代码被注释，然后运行没有错误。这条线没有评论，然后运行然后显示错误。 -[MKMapView updateOverlay:]

导航问题：在这一行polyline.map = self.map_view; 不兼容的指针类型分配给 'GMSMapView中* _Nullable' 从 '的MKMapView *'

请建议如何绘制折线。 Thankyou

来源

2017-01-23 user 12345

使用此代码。这对我来说很好。

-(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; 
}

来源

2017-01-23 09:19:20

感谢您的回复但AFHTTPNetwork设置不使用。因为我试过但没有成功在Xcode中设置。 –

无需AFHTTPNetwork设置。只需调用您的服务调用方法来调用上述服务并获取响应数组。我已经在我的现场项目中使用这段代码，它工作的很好。不要忘记评论。 –

你 - （void）setMapDataValue哪一次调用InViewDidLoad？ –

检查的self.map_view类型是GMSMapView与否？

来源

2017-01-23 09:25:43

For your information 'self.map_view'是一个UIMapView是否正确？ –

请回复。我很累。请帮忙:( –

GMSPolyline应该使用GMSMapView –

如何在MapView中绘制GMSPolyline

后错误显示

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