MbAutoCompleteTextField.Draw() throws InvalidCastException when XfxComboBox is not contained in a ScrollView

[alsed42]

Bug

• Version Number of Control: 1.1.3
• Device Tested On:
• Simulator Tested On: iPhone 8 iOS 12.1

Affects

• [x] iOS
• [ ] Android

Expected Behavior

XfxComboBox can be drawn successfully on iOS even if not contained inside a ScrollView.

Actual Behavior

InvalidCastException thrown at MbAutoCompleteTextField.Draw() if XfxComboBox is not contained inside a ScrollView and then the app crashes (see attached stacktrace).

XfxComboBox_InvalidCastException_Stacktrace.txt

Steps to reproduce the Behavior

• Put a XfxComboBox on a XAML Page and make sure that none of the parent controls are a ScrollView or a control derived from ScrollView
• Start the app in any iPhone device or simulator
• Navigate to the page with the XfxComboBox