Earlier this month I mentioned a library allowing you to theme user interfaces with a CSS style syntax, and change theming at runtime called Motif.
Here’s an open source library from Draveness that allows you to easily add a night version to your UIKit based interface components from Draveness called DKNightVersion.
DKNightversion adds nightColor properties to your UIKit components for different colorable attributes and then allows you to easily switch between the normal and night themes.
Here is an image showing DKNightVersion in action:
You can find DKNightVersion on Github here.
A nice library for easily creating and switching to a night version of your user interface.