IOS downloaded file not present in the File system.

Hi,
I used the flutter_downloader package for both Android and IOS. In Android the download is happening without any issue and when download is completed it displays on notification tray. But in IOS I am facing issue, when the download is completed I didn't got any notification and also the downloaded file is not present in the file manager of ipad. Is there any separate code to be done for making the downloaded file available in ipad's or iphone's file manager?

Here is my code for more details :
``` void downloadData() async {
String user = serverdata['username'].toString();
String pass = serverdata['password'].toString();
final directory = await getApplicationDocumentsDirectory();
String basicAuth = 'Basic ' + base64Encode(utf8.encode('$user:$pass'));
print(
"starting to download");
print( directory.path.toString()+" directory path");

Map requestHeaders = {
'Authorization': basicAuth,
};

final taskId = await FlutterDownloader.enqueue(
url: downloadUrl,
savedDir: directory.path,
fileName: downloadname,
headers: requestHeaders,
showNotification: true,
openFileFromNotification: true,
);

print("starting to download "+taskId.toString());

FlutterDownloader.registerCallback(downloadCallback);
FlutterDownloader.loadTasks();
}

static void downloadCallback(String id, DownloadTaskStatus status, int progress) {
Fluttertoast.showToast(
msg: "Download in Progress " + progress.toString(),
textColor: Colors.black,
toastLength: Toast.LENGTH_SHORT,
timeInSecForIos: 1,
gravity: ToastGravity.BOTTOM,
backgroundColor: Colors.white,
);

print("callback id %"+id );
print("callback status %"+ status.toString());
print("callback progress%"+progress.toString());

if(status.toString() == 'DownloadTaskStatus(3)')
{
Fluttertoast.showToast(
msg: "Download finished.",
textColor: Colors.black,
toastLength: Toast.LENGTH_SHORT,
timeInSecForIos: 1,
gravity: ToastGravity.BOTTOM,
backgroundColor: Colors.white,
);

}
else if(status.toString() == 'DownloadTaskStatus(4)'){
Fluttertoast.showToast(
msg: "Download Failed.",
textColor: Colors.black,
toastLength: Toast.LENGTH_SHORT,
timeInSecForIos: 1,
gravity: ToastGravity.BOTTOM,
backgroundColor: Colors.white,
);
}
}
```