Material Design for iOS is a set of user interface components from Google allowing you to create a Material Design interface on iOS.
The included components include user interface controls, typography components, layout components and more. Included are several different demos, and an in-depth how-to tutorial. The components work great with both Swift and Objective-C.
This animation from the readme shows the app created in the included Tutorial in action:
You can find Material-Components-iOS on Github here.
A great UI library for implementing Material Design on iOS.