How many hours did it take to complete? 6 hours

Which required and optional stories have you completed? Qequired stories include all of them: Creating a Settings View Controller, Designing the Settings Page, Loading and Saving, View Controller Lifecycle. Optional ones include: Adding a light/dark color theme to the settings view.

GIF walkthrough of all required and optional stories: ![alt tag] (https://github.com/xinghaihu/iOS_prework/blob/master/demo.gif)