Added new kb article textbox-touch-responsiveness-radpanelbar-ipad (#624)

Co-authored-by: KB Bot <[email protected]>

Author: github-actions[bot]

knowledge-base/textbox-touch-responsiveness-radpanelbar-ipad.md

@@ -0,0 +1,61 @@
+---
+title: Resolving Touch Responsiveness of TextBoxes in RadPanelBar on iPad
+description: Learn how to fix the issue where TextBox controls inside a RadPanelBar do not respond to touch events on an iPad.
+type: troubleshooting
+page_title: How to Make TextBox Controls Responsive to Touch Inside RadPanelBar on iPad Devices
+slug: textbox-touch-responsiveness-radpanelbar-ipad
+tags: radpanelbar, asp.net ajax, touch events, ipad, radtextbox, javascript
+res_type: kb
+ticketid: 1668915
+---
+
+## Environment
+
+<table>
+<tbody>
+<tr>
+<td>Product</td>
+<td>RadPanelBar for ASP.NET AJAX</td>
+</tr>
+<tr>
+<td>Version</td>
+<td>all</td>
+</tr>
+</table>
+
+## Description
+
+When viewing a web page on Safari (iPad, iPhone), `RadTextBox` controls placed inside a [RadPanelBar](https://docs.telerik.com/devtools/aspnet-ajax/controls/panelbar/overview) do not respond to touch events — specifically, the keyboard does not appear. However, the text boxes work as expected when placed outside the RadPanelBar.
+
+## Cause
+
+The issue stems from the way touch interactions are managed within Telerik controls, particularly how the touch scroll extender in the RadPanelBar interferes with touch events on iOS devices.
+
+## Solution
+
+Disable the touch scroll extender for the RadPanelBar when the page loads. This action allows the `RadTextBox` controls within the RadPanelBar to respond normally to touch events on iOS devices. Use the following JavaScript snippet in your page:
+
+```javascript
+<script>
+function OnClientLoad(sender, args) {
+    if (Telerik.Web.Browser.safari && Telerik.Web.Platform.ios && sender._touchScrollExtender) {
+        sender._touchScrollExtender.disable();
+    }
+}
+</script>
+```
+
+And add the `OnClientLoad` event to your `RadPanelBar` control:
+
+```aspnet
+<telerik:RadPanelBar ID="FindRadPanelBar" runat="server" OnClientLoad="OnClientLoad" ExpandMode="SingleExpandedItem" Width="100%">
+    <!-- PanelBar content here -->
+</telerik:RadPanelBar>
+```
+
+This solution specifically targets iOS devices to ensure that `RadTextBox` controls within the `RadPanelBar` become responsive to touch events, making them usable on devices like iPads.
+
+## See Also
+
+- [RadPanelBar Overview](https://docs.telerik.com/devtools/aspnet-ajax/controls/panelbar/overview)
+- [RadTextBox Overview](https://docs.telerik.com/devtools/aspnet-ajax/controls/textbox/overview)