PDF Viewer Scroll Not Working on iOS (Telerik UI for MAUI 11.1.0)

[Jeff]

Hi everyone,

I'm running into an issue with the Telerik PDF Viewer in a .NET MAUI project.

Environment:

• Telerik.UI.for.Maui: 11.1.0

• .NET MAUI: 9.0.111

• .NET version: net9.0-ios

• Platform: iOS

Problem:
Scrolling inside the RadPdfViewer does not work on iOS. The same code works as expected on Android — I can scroll through the PDF content normally. On iOS, the viewer loads and displays the first page correctly, but it’s completely static: no vertical scroll or swipe works. However, navigation using PdfViewerNavigateToNextPageToolbarItem or PdfViewerNavigateToPreviousPageToolbarItem still functions as expected.

<ContentPage>
    <Grid RowDefinitions="Auto, *">
        <telerik:RadPdfViewerToolbar x:Name="pdfViewerToolbar"
                                     OverflowMode="Scroll"
                                     PdfViewer="{x:Reference pdfViewer}">
            <telerik:PdfViewerFitToWidthToolbarItem />
            <telerik:PdfViewerNavigateToPreviousPageToolbarItem />
            <telerik:PdfViewerNavigateToNextPageToolbarItem />
            <telerik:PdfViewerZoomInToolbarItem />
            <telerik:PdfViewerZoomOutToolbarItem />
            <telerik:PdfViewerSearchNavigationToolbarItem />
            <telerik:PdfViewerToggleLayoutModeToolbarItem />
        </telerik:RadPdfViewerToolbar>
        <telerik:RadPdfViewer x:Name="pdfViewer"
                              Grid.Row="1"
                              AutomationId="pdfViewer"
                              BackgroundColor="{StaticResource White}"
                              IgnoreSafeArea="False"
                              IsClippedToBounds="True"                              
                              LayoutMode="ContinuousScroll"
                              Source="{Binding PdfFile}" />
    </Grid>
</ContentPage>

Has anyone else encountered this issue, or is there a known workaround/fix for iOS?

Thanks in advance!

Jeff

[Didi]

Hello Jeff,

Thank you for the provided details. I have created a sample app to test the scenario and I cannot reproduce the behavior. 

Send a sample project in which the issue happens and a video of the behavior. Also what is the exact iOS version you use for the test.

[Franck]

Hi,

I have the same issue.

Environment:

• Telerik.UI.for.MAUI : 11.1.0
• .NET Maui : 9.0.110
• Platform: iOS 18.7.1 (iPhone 16)