I receive often a NullReferenceException in ListViewGroupHeader ArrangeOverride method.
The error happens only in UWP.
Unfortunately, I cannot create a project to reproduce the error.
when a new ObservableCollection is assigned to the listview's ItemsSource during load on demand, there is an inconsistency in the scrolling.
- On Android the listview is scrolled to the top immediately and showing items at the top of the listview.
-On iOS and UWP, the listview position is not changed.
ListViewLoadOnDemandCollection method is not triggering in iOS automatically when there is a need to display the items on the screen. We have to manually scroll the list view then the ListViewLoadOnDemandCollection triggers and give further data to show.
Things are working fine on Android platform.
Follow this tutorial https://docs.telerik.com/devtools/xamarin/controls/listview/listview-features-load-on-demand#loading-mode-with-collection
It works on Android and iOS, but on UWP it is defaulting to Explicit mode and clicking the load button crashes the app.
When RadListView is setup to load its items on demand and the LayoutDefinition is GridLayout with SpanCount set to 2 or more, the Footer Template does not take all the width, it expands only to the Width of the first column.
The bug can be reproduced on iOS 13 only. It is not reproducible on earlier versions of iOS. Run the attached project on iOS 13 device or Simulator to reproduce it.
Sometimes when focusing an entry and the onscreen keyboard shows up, the ListView is not scrolled correctly, so the entry is overlapped by the keyboard. The ListView layout appears messed up after that and the scrolling does not behave correctly.
Activating the ItemHold event of an item in a list view requires holding down an item for a while. On a physical/virtual Android device and a virtual iOS device, this can be done by holding down the mouse/finger lightly on an item for a short period of time. However, on a physical iOS device (I am using a physical iPhone 6s to test this), holding down the item lightly with my finger won't activate the ItemHold event, and I have to hold the item really hard on the screen in order to activate it (similar to using 3D Touch / Force Touch, and I cannot reliably activate the ItemHold event possibly because my force is sometimes not hard enough). I noticed this behaviour on the physical iOS device since the ItemHold event got implemented in early 2018.
I created a simple application to demonstrate the issue. The app displays an alert when the user taps/holds an item in the list view. On a physical iOS device, holding down an item in the list view requires the user to press the item very hard on the screen.