objective-c - 如何对注释进行反向地理编码？

Question

我有一个删除多个注释的应用程序，我想对引脚位置进行反向地理编码并将地址设置为字幕。这是我到目前为止的代码，但我不知道如何实现反向地理编码器。

-(void)press:(UILongPressGestureRecognizer *)recognizer
{
    CGPoint touchPoint = [recognizer locationInView:worldView];
    CLLocationCoordinate2D touchMapCoordinate = [worldView convertPoint:touchPoint toCoordinateFromView:worldView];

    if (UIGestureRecognizerStateBegan == [recognizer state]) {
        MapPoint *mp = [[MapPoint alloc]initWithCoordinate:touchMapCoordinate
                                                 title:@"Dream House"];
        [worldView addAnnotation:mp];

        geocoder = [[CLGeocoder alloc]init];

        CLLocation *location = [[CLLocation alloc]initWithCoordinate:touchMapCoordinate
                                                        altitude:CLLocationDistanceMax
                                              horizontalAccuracy:kCLLocationAccuracyBest
                                                verticalAccuracy:kCLLocationAccuracyBest
                                                       timestamp:[NSDate date]];

        [geocoder reverseGeocodeLocation:location
                   completionHandler:^(NSArray *placemarks, NSError *error) {
                       <#code#>
                   }];

    }
}

别针会掉在家里，所以我只想显示房子地址。谢谢您的帮助。