title: how to draw polygon in google map in iOS, zip code wise in iOS
body: <p>i am working on map view where i have list of zip code and i want to highlight area of every zip code on map.
  i am using google map.
  i have list of zip code.
  what i actually need is boundary coordinates of every zip code.</p>
  
  <p>actual requirements are in picture.
  <img src="https://i.stack.imgur.com/4fPse.png" alt="enter image description here"></p>
  
  <pre><code>CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
  [geoCoder geocodeAddressString:@"94111" completionHandler:^(NSArray *placemarks, NSError *error) {
  
      GMSMutablePath *rect = [GMSMutablePath path];
  
      for (CLPlacemark* aPlacemark in placemarks)
      {
          // Process the placemark.
          CLLocation *location = aPlacemark.location;
  
          CLLocationCoordinate2D coordinate = location.coordinate;
  
          NSLog(@"Latitude %f", coordinate.latitude);
  
          NSLog(@"Longitude %f", coordinate.longitude);
  
          [rect addCoordinate:CLLocationCoordinate2DMake(coordinate.latitude, coordinate.longitude)];
      }
  
      // Create the polygon, and assign it to the map.
      GMSPolygon *polygon = [GMSPolygon polygonWithPath:rect];
      polygon.fillColor = [UIColor colorWithRed:0.25 green:0 blue:0 alpha:0.75];
      polygon.strokeColor = [UIColor blackColor];
      polygon.strokeWidth = 2;
      polygon.map = self.mapVew;
  
  
  }];
  </code></pre>