SfListView exception after update to Xamarin.Forms 4.7.0.968 on iOS

[Radoslaw Kubas]

Hello,

I noticed that after Xamarin.Forms update from 4.6.0.967 to 4.7.0.968 SfListView swipe left and right gesture throw exception (only on iOS, Android is fine).

Best regards,

Radoslaw kubas

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

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateClip () [0x00072] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:413 

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.UpdateNativeControl () [0x0006c] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:386 

  at Xamarin.Forms.Platform.iOS.VisualElementTracker.HandlePropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00064] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementTracker.cs:97 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_PropertyChangedEventArgs(object,System.ComponentModel.PropertyChangedEventArgs)

  at Xamarin.Forms.BindableObject.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:229 

  at Xamarin.Forms.Element.OnPropertyChanged (Sy

stem.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:353 

  at Xamarin.Forms.BindableObject.SetValueActual (Xamarin.Forms.BindableProperty property, Xamarin.Forms.BindableObject+BindablePropertyContext context, System.Object value, System.Boolean currentlyApplying, Xamarin.Forms.Internals.SetValueFlags attributes, System.Boolean silent) [0x00114] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:461 

  at Xamarin.Forms.BindableObject.SetValueCore (Xamarin.Forms.BindableProperty property, System.Object value, Xamarin.Forms.Internals.SetValueFlags attributes, Xamarin.Forms.BindableObject+SetValuePrivateFlags privateAttributes) [0x00173] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:397 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindableProperty property, System.Object value, System.Boolean fromStyle, System.Boolean checkAccess) [0x00042] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:334 

  at Xamarin.Forms.BindableObject.SetValue (Xamarin.Forms.BindablePropertyKey p

ropertyKey, System.Object value) [0x0000e] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:318 

  at Xamarin.Forms.VisualElement.set_X (System.Double value) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:463 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x00043] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:314 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:708 

  at Syncfusion.ListView.XForms.LayoutBase.LayoutSwipedItem (Syncfusion.ListView.XForms.ListViewItem item, System.Boolean canAnimateReset, System.Boolean canAnimateLayout) [0x001c5] in <ee55715f4e8e4345b1e86268c4bf6e03>:0 

  at Syncfusion.ListView.XForms.SwipeController.LayoutSwipeView (Syncfusion.ListView.XForms.ListViewItemInfoBase itemInfo, System.Boolean canAnimate) [0x00011] in <ee55715f4e8e4345b1e86268c4bf6e03>:0 

  at Syncfusion.ListView.XForms.SwipeController.ProcessTouchMove (Syncfusion.ListView.XForms.ListViewIte

mInfoBase itemInfo, Xamarin.Forms.Point point) [0x0022d] in <ee55715f4e8e4345b1e86268c4bf6e03>:0 

  at Syncfusion.ListView.XForms.SwipeController.HandleTouchInteractions (Syncfusion.ListView.XForms.ListViewItemInfoBase itemInfo, Xamarin.Forms.GestureStatus status, Xamarin.Forms.Point point) [0x00068] in <ee55715f4e8e4345b1e86268c4bf6e03>:0 

  at Syncfusion.ListView.XForms.iOS.ListViewItemRenderer.OnPanChanged (UIKit.UIPanGestureRecognizer panGesture) [0x000e3] in <a2150a9aa7204a3f85fe0c4bec5b8fe9>:0 

  at UIKit.UIPanGestureRecognizer+Callback.Activated (UIKit.UIPanGestureRecognizer sender) [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.2.1/src/Xamarin.iOS/UIKit/UIGestureRecognizer.cs:247

--- End of stack trace from previous location where exception was thrown ---

[Lakshmi Natarajan]

Hi Radoslaw, 

 

Thank you for using Syncfusion products. 

 

We have checked the reported query “SfListView Swiping breaking with Xamarin.Forms version 4.7” from our end. On further analysis, we would like to inform you that the reported issue is a break from Xamarin.Forms version 4.7. Kindly follow up with the following bug report for further updates, 

 

Bug report: https://github.com/xamarin/Xamarin.Forms/issues/11132 

 

Please let us know if you need further assistance. 

 

Regards, 

Lakshmi Natarajan 

 

[Radoslaw Kubas]

Thank you for the information. 

[Lakshmi Natarajan]

Hi Radoslaw,  

  

Thank you for the update. 

  

Please let us know if you would require any further assistance. As always we are happy to help you out.  

  

Regards,  

Lakshmi Natarajan  

[Suthahar]

Hi team,

I am getting same issue, do you have any update on this 

[Lakshmi Natarajan]

Hi Suthahar, 

 

Thank you for using Syncfusion products. 

 

We have checked the reported scenario at our side. We would like to inform you that the reported issue is a framework level issue in Xamarin.Forms 4.7.0.968 and it has been fixed in the later Xamarin.Forms 4.7.0.1142 version. 

 

Please refer to the following issue report for the same, 

https://github.com/xamarin/Xamarin.Forms/issues/11132#issuecomment-658988890 

 

Please update the Xamarin.Forms to v 4.7.0.1142 to resolve the issue. Please let us know if you need further assistance. 

 

Regards, 

Lakshmi Natarajan