Tell us about the features and technologies you used in your Swift playground.

This playground explores scenarios and techniques to make an app accessible, and how to design with the goal of empowering every individuals to benefit from technologies equally. Thus, apparently features in UIAccessibility informal protocol are used to demonstrate the different tips and tricks about improving user experience through Voice Over. Due to limitations of Playgrounds, Voice Over is rather partially simulated using AVSpeechSynthesizer.

Since this is an iOS Playground, interfaces for demonstrating accessibility features are written with standard UIKit controls, constrained using Auto Layout, and fonts are scaled using UIFontMetrics in places where support for Dynamic Type is been discussed. But I did use Core Animation/Core Graphics/Core Image for the mind-blowing particle effect (CAEmitterLayer) on the first page of this playground.

As we all know, been accessible is not just about caring for those with different abilities, but also about paying to small details in meeting the demands of the diverse user groups. That’s why I used NSLocalizedString, formatters and date operations provided through Foundation for the purpose of internationalization and localization.

Here I define accessibility to be beyond just design, but also distribution. That is, the playground laid out road map into classrooms with ClassKit. At the end of the playground, there’s an evaluation phase, which is empowered by Natural Language, Core ML, and Create ML framework. The supplemental macOS Playground for deriving the model are included as a Resource to that playground Page. Feel free to take a look as well. (Please ignore the instruction in the playground that says download data set. That's unnecessary).

Although I’m really short on time, I made sure code quality and readability are not bad, and mostly followed good practices in using Swift (partial ranges, collection slices, etc.). And to make Playground looks aesthetically appealing, markup language, CustomPlaygroundDisplayConvertible, literals, and other playground essentials are used.