We have a RadCalendar and we set the CalendarViewMode to "Year". And we tap on an arbitrary month in order to open it (change the ViewMode to "Month").


EXPECTED result: The selected (tapped) month is opened, i.e. the ViewMode is changed to "Month". And this is happening on Android.

ACTUAL result: On iOS the result is this exception:
System.InvalidCastException: Unable to cast object of type 'TelerikUI.TKCalendarYearPresenter' to type 'UIKit.UIView'

 Item tapped is raised after hold gesture in IOS listview. The control should recognize a hold gesture is initiated and item tapped event should not be raised.

Currently customers can be notified when a token is created. If the control is used in plain text scenario there is no way to notify the user when suggestion item is selected.

Available in minor release 2017.3.927. It will also be available in the R3 2017 SP release.

Please add a UI for Xamarin option in the Telerik Code Library (http://www.telerik.com/support/code-library).

Currently, it only has the following products:

Kendo UI
UI for ASP.NET AJAX
UI for ASP.NET MVC
UI for PHP
UI for JSP
UI for Silverlight
UI for WPF
UI for WinForms	
Reporting
Data Access
Test Studio

The iOS numeric auto range algorithm is not very human readable and sometimes it can calculate a step like 2810 (in which case 2000 or 5000 would have been much more readable). The algorithm needs to be improved, so that developers do not need to go and calculate ranges on their own.

Please add support for ListViewCachingStrategy to the ListView. It's performance for large collection of items makes it unusable for production.

The reason for the exception is that when the IsBusy of the indicator changes, the Content is added to and removed from the visual tree. Because it is data-bound, the chart immediately tries to notify its native counterpart that an update is necessary, and the iOS control is looked up. However, sometimes, the old iOS control is found, which has been disposed.
A possible workaround is not to put content inside the busy indicator. Use the busy indicator as a simple overlay.

Available in the R3 2018 SP release.

There are 2 approaches to customize the theme -> directly override the resources in the BlueResources dictionary or create a custom resource dictionary and merge it instead of the BlueResources one.

If you take the first approach in a .NET standard project and override one of the colors -> an ArgumentException is thrown:

Use the second approach as a workaround where you create a custom resource dictionary, copy all the colors from the original one and modify them within your custom one.

Available in the R3 2018 SP release.

Create a framework which will expose touch events for consuming from Xamarin Forms apps.

Maybe work with Frank A. Krueger https://twitter.com/praeclarum, to support RadGrid on Ooui platform. Or at least a more basic version of it!

Chart: [iOS] A needless label is displayed at the end for DateTimeContinuousAxis

As of 2018.2.620, UI for Xamarin will invoke approximate 600 warnings when compiling an Android project that uses SDK later than 23.

This is due to the fact that the UI for Xamarin.Android controls are built on API 23, which will surface warnings at compile time if the project consuming them is using a later version.

Although UI for Xamarin is compatible with newer version, and causes no impact on the outcome, these warnings obscure any meaningful warnings the user might have. 

This is a problem when projects are built in a CI/Cd pipeline and warnings are treated as important/significant for enterprise CD deployment (i.e. scrolling through 600 warnings to find any legitimate warnings is not practical).

Available in R3 2018 release.

When Maximizing and Restoring the application's window, the RadSideDrawer's MainContent sometime gets measured wrong. This results in a corrupt state where all the main content is off-screen when the app is in the Restored state.

This can be tricky to reproduce without guidance, therefore I've recorded a video (attached) to demonstrate how to reproduce it as fast as possible with the code below:

If we have a ListView with a CheckBox inside the ItemTemplate and the whole ListView is placed in a Popup control, following the next steps:

1. Open the popup

2. Check and uncheck the CheckBox control in any of the items.

3. Click into the popup and then outside to close it.

NullReferenceException is raised on iOS.

Hi Team,

I implemented radcheckbox in my xamarin telerik application. In which i select checkbox and afterword i post some data through webAPI. After completion of posting data i got response from server and my app got crashed and show me following stack trace data,

  at Telerik.XamarinForms.PrimitivesRenderer.iOS.CheckBoxRenderer.OnElementDetached (Telerik.XamarinForms.Primitives.RadCheckBox oldElement) [0x00025] in <f3723b4c1d3f406496717d69142c8f84>:0 

  at Telerik.XamarinForms.Common.iOS.IosRendererBase`2[S,T].Dispose (System.Boolean disposing) [0x0001f] in <81c15264f2164ef79a02e84ed79e8bfd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose (System.Boolean disposing) [0x0003f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.Dispose () [0x00000] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementRenderer`1[TElement].Dispose (System.Boolean disposing) [0x00058] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Foundation.NSObject.Dispose () [0x00000] in /Library/Frameworks/Xamarin.iOS.framework/Versions/12.14.0.114/src/Xamarin.iOS/Foundation/NSObject2.cs:147 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (Xamarin.Forms.VisualElement view) [0x0003e] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Platform.iOS.VisualElementPackager.OnChildRemoved (System.Object sender, Xamarin.Forms.ElementEventArgs e) [0x0000f] in <612eab01c6f546df983c0637f996b4cd>:0 

  at Xamarin.Forms.Element.OnChildRemoved (Xamarin.Forms.Element child) [0x00007] in D:\a\1\s\Xamarin.Forms.Core\Element.cs:343 

  at Xamarin.Forms.VisualElement.OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in D:\a\1\s\Xamarin.Forms.Core\VisualElement.cs:750 

  at Xamarin.Forms.Layout`1[T].OnChildRemoved (Xamarin.Forms.Element child) [0x00000] in <4542de7f0f544d51b46d63bd15d5f6b5>:0 

  at Xamarin.Forms.Layout.OnInternalRemoved (Xamarin.Forms.View view) [0x00012] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:464 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x0002b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:427 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].RemoveItem (System.Int32 index) [0x00021] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.Collection`1[T].Remove (T item) [0x00027] in <939d99b14d934342858948926287beba>:0 

  at Xamarin.Forms.Layout.OnInternalAdded (Xamarin.Forms.View view) [0x0000b] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:451 

  at Xamarin.Forms.Layout.InternalChildrenOnCollectionChanged (System.Object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00078] in D:\a\1\s\Xamarin.Forms.Core\Layout.cs:443 

  at (wrapper delegate-invoke) <Module>.invoke_void_object_NotifyCollectionChangedEventArgs(object,System.Collections.Specialized.NotifyCollectionChangedEventArgs)

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedEventArgs e) [0x00018] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

  at System.Collections.ObjectModel.ObservableCollection`1[T].OnCollectionChanged (System.Collections.Specialized.NotifyCollectionChangedAction action, System.Object item, System.Int32 index) [0x00009] in <a1ab7fc4639d4d84af41d68234158b1c>:0 

My xaml code,

<telerikControls:RadCheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" HorizontalOptions="Center" VerticalOptions="Center" />

My model class code,

private bool _isSelected;
        public bool IsSelected
        {
            get { return _isSelected; }
            set
            {
                _isSelected = value;
            }
        } 

Version information,

Xmarin form version : 4.1.0

Telerik UI version : 2019.2.802.1

iOS version 12.2