[jtreanor]

Interesting work, thanks for sharing.

  The input field is subview of the keyboard’s window. This is likely undesirable, especially for chat applications.

I am curious as to why this is undesirable. It makes sense to me that something docked to the keyboard would be in the same window.

[ayrkm]

It's because the input field will always appear at window level above the level of key window. So, if you need to show overlay in key window, the input field will appear above the overlay. Example for such overlay could be a loading indicator.