Xamarin.Forms shell app with PdfViewer crashes out on IOS

[Aaron]

I've created a "shell" xamarin forms app in VS 2019, added pdfviewer nuget, added page with pdfviewer tag, when run in IOS simulator or device app crashes when navigating to pdf tab. Works fine in android. Zipped project attached.

Message: Object reference not set to an instance of an object

Source: Syncfusion.SfPdfViewer.XForms

Stack:   at Syncfusion.SfPdfViewer.XForms.SfPdfViewerResources.get_Culture () [0x00006] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.SfPdfViewerResources.get_sfpdfviewer_bookmarksbutton () [0x00000] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.TopToolbar..ctor (Syncfusion.SfPdfViewer.XForms.MobileToolbar toolbar) [0x00141] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.MobileToolbar.Initializelayout () [0x00000] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.Toolbar.InitializeLayout (Syncfusion.SfPdfViewer.XForms.SfPdfViewer pdfViewer) [0x00065] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.Toolbar.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00010] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Syncfusion.SfPdfViewer.XForms.SfPdfViewer.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00065] in <bd495b3593264400a9fe06dbebd3b785>:0 

  at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:266 

  at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:224 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:805 

  at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:1084 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:320 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:701 

  at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.VisualElement child, Xamarin.Forms.Rectangle region) [0x001da] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:178 

  at Xamarin.Forms.Grid.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00144] in D:\a\1\s\Xamarin.Forms.Core\GridCalc.cs:49 

  at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:266 

  at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:224 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:805 

  at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:1084 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:320 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:701 

  at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.VisualElement child, Xamarin.Forms.Rectangle region) [0x001da] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:178 

  at Xamarin.Forms.Grid.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x00144] in D:\a\1\s\Xamarin.Forms.Core\GridCalc.cs:49 

  at Xamarin.Forms.Layout.UpdateChildrenLayout () [0x00158] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:266 

  at Xamarin.Forms.Layout.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:224 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:805 

  at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:1084 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:320 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:701 

  at Xamarin.Forms.Layout.LayoutChildIntoBoundingRegion (Xamarin.Forms.VisualElement child, Xamarin.Forms.Rectangle region) [0x001da] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:178 

  at Xamarin.Forms.Page.LayoutChildren (System.Double x, System.Double y, System.Double width, System.Double height) [0x0010d] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:285 

  at Xamarin.Forms.Page.UpdateChildrenLayout () [0x000ca] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:361 

  at Xamarin.Forms.Page.OnSizeAllocated (System.Double width, System.Double height) [0x0000f] in D:\a\1\s\Xamarin.Forms.Core\Page.cs:341 

  at Xamarin.Forms.VisualElement.SizeAllocated (System.Double width, System.Double height) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:805 

  at Xamarin.Forms.VisualElement.SetSize (System.Double width, System.Double height) [0x00021] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:1084 

  at Xamarin.Forms.VisualElement.set_Bounds (Xamarin.Forms.Rectangle value) [0x0005d] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:320 

  at Xamarin.Forms.VisualElement.Layout (Xamarin.Forms.Rectangle bounds) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:701 

  at Xamarin.Forms.Platform.iOS.PageRenderer.ViewDidLayoutSubviews () [0x00021] in D:\a\1\s\Xamarin.Forms.Platform.iOS\Renderers\PageRenderer.cs:179 

  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 /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.1.31/src/Xamarin.iOS/UIKit/UIApplication.cs:86 

  at UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0000e] in /Library/Frameworks/Xamarin.iOS.framework/Versions/13.18.1.31/src/Xamarin.iOS/UIKit/UIApplication.cs:65 

  at XamarinPDFTest.iOS.Application.Main (System.String[] args) [0x00002]

Attachment: XamarinPDFTest_bca2b467.zip

[Satheesh Palanisamy]

Hi Aaron,    

   

Thank you for contacting Syncfusion support.    

   

We were able to reproduce the issue, “Application crashes while placing the SfPdfViewer in the Xamarin Forms shell”. Currently, we are validating the issue and we will update the further details on May 27 th, 2020.     

  

Regards,    

Satheesh Palanisamy.  

[Ashokkumar Viswanathan]

Hi Aaron, 

We have analyzed the issue, “Application crashes while placing the SfPdfViewer in the Xamarin Forms shell” in our end. This issue can be resolved in the sample level itself, we need to call ‘Syncfusion.SfPdfViewer.XForms.iOS.SfPdfDocumentViewRenderer.Init();’ in the AppDelegate class of  iOS Project to render the PDFviewer control in iOS platform. 

Please find the modified sample in the below link, 

https://www.syncfusion.com/downloads/support/directtrac/general/ze/XamarinPDFTest1087679463.zip 

Please find the UG documentation below, 

https://help.syncfusion.com/xamarin/pdf-viewer/getting-started#creating-a-simple-pdf-viewer-application 

Please try the above modified sample, let us know whether provided solution resolved your issue. 

Regards, 

Ashok Kumar Viswanathan. 

[Aaron]

That fixed it, many thanks.