RadComboBox does not work in ListView Xamarin forms

[Tasnim]

When I tap on the RadComboBox arrow in listview it gives the below exception. Kindly help

event registration is overwriting existing delegate. either just use events or your own delegate: xamarin.forms.platform.ios.listviewrenderer+listviewdatasource uikit.uiscrollview+_uiscrollviewdelegate

[Didi]

Hi Tasnim,

I have researched the case and it seems the exception occurs in a combination of ScrollViews which are used inside the ListView and Combo. You can prevent the exception using the following solution: 

Set the following code inside the AppDelegate.cs file inside the iOS project and test whether this will solve the issue on your side. 

After the Xamarn.Forms.Forms.Init(); paste the following code:

 

 UIApplication.CheckForEventAndDelegateMismatches = false;

 

Regards,
Didi
Progress Telerik

[Manish]

I have a Rad popup inside the List view and when trying to open the popup iOS app crashes with the same error. 

I updated the solution mention and crash issue on the button that used for opening the popup is fixed

But after opening and closing the popup if I scroll down for a while then iOS app crashes

[Didi]

Send us the exact stack-trace you receive when scrolling down.