问IOS/iPhone示例代码，用于通过地名和/或通过使用Google Maps API的地图选择位置？

EN

-(void)queryAddress
{
  // Initialize member BSForwardGeocoder object
  if (forwardGeocoder == nil) {
    forwardGeocoder = [[BSForwardGeocoder alloc] initWithDelegate:self];
  }

  // send the request

  [forwardGeocoder findLocation:@"Saint Paul, MN"];
}

-(void)forwardGeocoderFoundLocation:(BSForwardGeocoder *)geocoder
{   
  /*
   * BSForwardGeocoder delegate method. Receives the callback upon geocoding data gather   completion.
   */
  if (forwardGeocoder.status == G_GEO_SUCCESS) {

    int searchResults = [forwardGeocoder.results count];

    for (int i = 0; i < searchResults; i++) {

      // See the sample project code fore other useful location properties...
      // Here I retrieve the returned lat and lon.

      Result *location = [forwardGeocoder.results objectAtIndex:i];
      mLatitude = location.latitude;
      mLongitude = location.longitude;
    } 
  } else { 
    NSString *message = @"";

    switch (forwardGeocoder.status) {
        case G_GEO_BAD_KEY:
            message =@"Bad Api Key";
            break;

        case G_GEO_UNKNOWN_ADDRESS:
            message = @"Address Not Found!";
            break;

        case G_GEO_TOO_MANY_QUERIES:
            message = @"Too Many Queries";   
            break;

        default:
            break;
    }

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Information" 
                                                    message:message
                                                   delegate:nil 
                                          cancelButtonTitle:@"OK" 
                                          otherButtonTitles: nil];  
    [ alert show ];
    [ alert release ];  
  }
}