iOS Accessibility Not a question anymore ! Romain VINCENS @romainvincens CocoaHeads Strasbourg March 3rd, 2016

– OS X Dictionary “The quality of being easily reached, entered, or used by people who have a disability”

• Built in iOS and OS X • Focusing mainly on visual disability • Main technology is VoiceOver

Demo

Developers • UIAccessibility protocol NSObject(UIAccessibility) • Built in UIKit • Most of the work is done for free ! • But beware of your custom UI

Customization • isAccessibilityElement : On/Off • accessibilityLabel : what’s spoken by VoiceOver • accessibilityValue : ex for a UITextField or UISlider • accessibilityHint : indicates what actioning the UI element will do • accessibilityTraits : what’s the nature or the characteristics of the UI element • accessibilityFrame : where the element is on screen

VO Notifications • Pronounce any text • Notify VO from a major layout change • Helper

VO Notifications • Demo : get the VO status and adapt your UI

Implementing UIAccessibility • Drawing a custom UI element • Need to define its nature, its elements to be spoken, how to interact, what needs to be selected …

Tips and tricks • view.alpha = 0.0 : still visible for VO. Use hidden instead • Think about internationalization • Element order in Interface Builder may have an influence on VO

Pros • Generally easy to setup • Widen your audience • Proud of meticulous work • Marketing boost

Cons • Cannot suit all types of projects (ex: video games, photos app) • Might be hard/long to apply to an existing (old) project (number of screens, custom UI etc…)

–Gwen Stefani “What you waiting for ?”