I have a error in XF.ios. plz help me

[leehanjune]

Unhandled Exception:

System.NullReferenceException: Object reference not set to an instance of an object

  at Syncfusion.SfNavigationDrawer.iOS.SfNavigationDrawer.addShadowToMenuView () [0x00059] in <cdb5cf26cd49423e82d5fe75ac7f0ffc>:0 

  at Syncfusion.SfNavigationDrawer.iOS.SfNavigationDrawer.DeviceRotated (Foundation.NSNotification notification) [0x000b3] in <cdb5cf26cd49423e82d5fe75ac7f0ffc>:0 

  at Foundation.InternalNSNotificationHandler.Post (Foundation.NSNotification s) [0x00000] in /Users/builder/data/lanes/5024/152b654a/source/xamarin-macios/src/Foundation/NSNotificationCenter.cs:48 

  at (wrapper managed-to-native) UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr)

  at UIKit.UIApplication.Main (System.String[] args, System.IntPtr principal, System.IntPtr delegate) [0x00005] in /Users/builder/data/lanes/5024/152b654a/source/xamarin-macios/src/UIKit/UIApplication.cs:79 

  at UIKit.UIApplication.Main (System.String[] args, System.String 

i'm today changed Xamarin.Forms New version.

and i had a errors.

what is addShadowToMenuView?

i don't find that method.

help me plz.

i 'm using NavigationDrawer verision is 15.2.0.46

prev Xamarin.forms.version : 2.3.0.270

Xamarin.forms version : 2.4.0.280

iOS version : iOS11

[Selva Kumar Veerakrishnan]

Hi Leehanjune,

Thank you for contacting Syncfusion Support.

The reported issue "NavigationDrawer get crash when we rotate the device" has been fixed and it is available in our Volume 3 service pack 2 release. Please download the same from the link given below.

https://www.syncfusion.com/forums/132941/essential-studio-2017-volume-3-service-pack-release-v15-3-0-33-available-for-download

Please let us know if you have any concern on this.

Regards,
Selva Kumar V.