Xamarin.forms: [Bug] In iOS dark mode, Editor is having text in black on black background.

[zijianhuang]

Description

As of Xamarin.Forms 4.5.0.657, Entry is working well with dark mode of iOS, however, Editor is not good: while the placehoder is in light gray text on black ground, however when you type something, the text is in black color apparently.

Steps to Reproduce

1. In VS 2019, create a Xamarin Forms project with the MasterDetails template.
2. Run the app in dark mode of iPhone/iPad simulator or real device.
3. Add a new item which description is with Editor

Expected Behavior

Similar rendering like Entry with gray white text on black background.

Actual Behavior

Black text on black background

Workaround

Explicitly define black text and white background for Entry and Editor.

Related to https://github.com/xamarin/Xamarin.Forms/issues/9804

[hartez]

This is fixed in 4.6.0.726.