SfCalendar crashing on iOS

[Pedro Conde]

Hi,

When using a Master-Detail navigation in Xamarin Forms, if a SfCalendar is added to the Detail page and the user navigates back, the app crashes. It only happens in iOS, Android is fine.

I've attached a sample so you can reproduce it. Just select an item from the list, which will navigate to the detail page that has the calendar, and then go back.

Can you help, please?

Kind regards,

Nuno

Attachment: SfCalendarIssue_62d00e5f.zip

[Vigneshkumar Ramasamy]

Hi Pedro Conde,

Sorry for the inconvenience,

We were able to reproduce the reported issue with “Crash occurs when using MasterDetails page with SfCalendar control” at our end. And we have logged a defect report regarding the same. A support incident to track the status of this defect has been created under your account. 

Please log on to our support website to check for further updates.

http://www.syncfusion.com/Account/Logon?ReturnUrl=%2fsupport%2fdirecttrac/  

Regards, 

Vigneshkumar R 

[Luca]

me too.. can you hep me please?

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

  at Syncfusion.SfCalendar.XForms.iOS.SfCalendarRenderer.OnElementPropertyChanged (System.Object sender, System.ComponentModel.PropertyChangedEventArgs e) [0x00014] in <dd8aeb5359624548a13c2b88d298afdf>:0 

  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:150 

  at Xamarin.Forms.Element.OnPropertyChanged (System.String propertyName) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:398 

  at Xamarin.Forms.BindableObject.ClearValue (Xamarin.Forms.BindableProperty property, System.Boolean fromStyle, System.Boolean checkAccess) [0x000c1] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:507 

  at Xamarin.Forms.BindableObject.ClearValue (Xamarin.Forms.BindableProperty property) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\BindableObject.cs:44 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x0007d] in <2dda3b1bfacd483c96a064e61838cf65>:0 

  at Xamarin.Forms.Platform.iOS.ViewRenderer`2[TView,TNativeView].Dispose (System.Boolean disposing) [0x00000] in <2dda3b1bfacd483c96a064e61838cf65>:0 

  at Syncfusion.SfCalendar.XForms.iOS.SfCalendarRenderer.Dispose (System.Boolean disposing) [0x0001d] in <dd8aeb5359624548a13c2b88d298afdf>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:69 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:37 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x00058] in <2dda3b1bfacd483c96a064e61838cf65>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:69 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:37 

  at Xamarin.Forms.Platform.iOS.ScrollViewRenderer.Dispose (System.Boolean disposing) [0x00016] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\ScrollViewRenderer.cs:165 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:69 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in D:\a\1\s\Xamarin.Forms.Platform.iOS\VisualElementPackager.cs:37 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x00058] in <2dda3b1bfacd483c96a064e61838cf65>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.Platform.DisposeModelAndChildrenRenderers (Xamarin.Forms.Element view) [0x00038] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Platform.cs:237 

  at Xamarin.Forms.Platform.iOS.Platform+<Xamarin-Forms-INavigation-PopModalAsync>d__23.MoveNext () [0x00143] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Platform.cs:134 

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

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 

  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in <c4da4bcb0a614f31bf9f25261a36b747>:0 

  at Xamarin.Forms.Application+NavigationImpl+<OnPopModal>d__2.MoveNext () [0x0005d] in D:\a\1\s\Xamarin.Forms.Core\Application.cs:380 

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

  at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess (System.Threading.Tasks.Task task) [0x00037] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:187 

  at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (System.Threading.Tasks.Task task) [0x00028] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:156 

  at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd (System.Threading.Tasks.Task task) [0x00008] in /Library/Frameworks/Xamarin.iOS.framework/Versions/11.14.0.13/src/Xamarin.iOS/mcs/class/referencesource/mscorlib/system/runtime/compilerservices/TaskAwaiter.cs:128 

  at System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult () [0x00000] in <c4da4bcb0a614f31bf9f25261a36b747>:0 

  at IXApp.VM.MainViewModel+<GoToPreviousPage>d__359.MoveNext () [0x00065] in D:\Dev\Updater\IXApp\IXApp\VM\MainViewModel.cs:1548 }

[Vigneshkumar Ramasamy]

 

Hi Alberto,

Sorry for the inconvenience,

We were able to reproduce the reported issue with “Crash occurs when using MasterDetails page with SfCalendar control” at our end. And we have logged a defect report regarding the same. A support incident to track the status of this defect has been created under your account. 

Please log on to our support website to check for further updates.

http://www.syncfusion.com/Account/Logon?ReturnUrl=%2fsupport%2fdirecttrac/  

Regards,  

Vigneshkumar R  

[Clinton Rocksmith]

We too have this problem.  Looking forward to a release to fix this.

Thank you

[Vigneshkumar Ramasamy]

Hi Clinton 

 

The reported issue” Crash occurs when using MasterDetails page with SfCalendar control” will be fixed and included in our upcoming Volume2 SP2 release, which is expected to be available by end of August 2018. We appreciate your patience until then. 

 

Regards 

Vigneshkumar R  

[Antonio Stan]

Hello,

I'm using v16.3.0.21 and the crash is still there in iOS, but I can share with you my workaround. In the Core project, create 

public class CustomSfCalendar : SfCalendar
    {
    }  

And just simply create a custom renderer for iOS

[assembly: ExportRenderer(typeof(CustomSfCalendar), typeof(CustomSfCalendarRenderer))]
namespace HobbyDanceApp.iOS.CustomRenderers
{
    public class CustomSfCalendarRenderer : SfCalendarRenderer
    {
        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            try
            {
                base.OnElementPropertyChanged(sender, e);
            }
            catch (Exception ex)
            { 
            }
        }
    }
} 

Giving the fact that in stack trace the exception was thrown in OnElementPropertyChanged, I thought that if I wrap the base call in a try catch, I'll get rid of the exception. But surprise, it does not crash anymore...  

Kind regards,

Antonio D. Stan

[Vigneshkumar Ramasamy]

Hi Antinio,

Thanks you for contacting Syncfusion Support.

Based on the provided information, we have checked, and we are able to reproduce the mentioned issue with “SfCalendar crashes in updated Xamarin.Forms version (above 2.5.0.280555) on Xamarin.Forms (iOS)”. We have considered this is an issue and we have logged the issue report on this, we will provide fix for the reported issue in our upcoming Volume 3 SP1 which will be rolled out in the end of October 2018. We appreciate your patience until then.

As of now, it will be working fine Xamarin.Forms stable version (2.5.0.280555). Please find the Xamarin.Forms stable version and prerelease version details from the below link,

Link: https://developer.xamarin.com/releases/

Please let us know if you have any concern.

Regards,
Vigneshkumar R 

[IoTFier]

Hi Antinio,

Thanks you for contacting Syncfusion Support.

Based on the provided information, we have checked, and we are able to reproduce the mentioned issue with “SfCalendar crashes in updated Xamarin.Forms version (above 2.5.0.280555) on Xamarin.Forms (iOS)”. We have considered this is an issue and we have logged the issue report on this, we will provide fix for the reported issue in our upcoming Volume 3 SP1 which will be rolled out in the end of October 2018. We appreciate your patience until then.

As of now, it will be working fine Xamarin.Forms stable version (2.5.0.280555). Please find the Xamarin.Forms stable version and prerelease version details from the below link,

Link: https://developer.xamarin.com/releases/

Please let us know if you have any concern.

Regards,
Vigneshkumar R 

Hi Vigneshkumar , this is still failing under XF V3.2 and 3.3 as well.

Can you please share the required fix under these versions as well?

Thnks

[Vigneshkumar Ramasamy]

Hi Antinio, 

 

Thanks for the update. 

 

We have checked your query and the reported crash issue will be fixed in XF V3.3 also. As mentioned before issue fix will be available in our upcoming Volume 3 SP1 which will be rolled out in the end of October 2018. We appreciate your patience until then. 

 

Regards 

Vigneshkumar R 

[Rohit Jaitly]

Hi,

Is there any fixes available of this issue?

[Vigneshkumar Ramasamy]

Hi Rohit Jaitly 

 

Thanks for contacting Syncfusion support. 

 

We have already fixed the reported crash issue calendar and you can download our latest version from below link. 

 

https://www.syncfusion.com/forums/140650/essential-studio-2018-volume-3-service-pack-release-v16-3-0-29-available-for-download  

 

Please let us know if this helpful. 

 

Regards 

Vigneshkumar R