iOS Accessibility

Transcript

1. iOS Accessibility Not a question anymore ! Romain VINCENS @romainvincens CocoaHeads Strasbourg March 3rd, 2016
2. – OS X Dictionary “The quality of being easily reached, entered, or used by people who have a disability”
3. • Built in iOS and OS X • Focusing mainly on visual disability • Main technology is VoiceOver
4. Demo
5. Developers • UIAccessibility protocol NSObject(UIAccessibility) • Built in UIKit • Most of the work is done for free ! • But beware of your custom UI
6. 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
7. VO Notifications • Pronounce any text • Notify VO from a major layout change • Helper
8. VO Notifications • Demo : get the VO status and adapt your UI
9. 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 …
10. 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
11. Pros • Generally easy to setup • Widen your audience • Proud of meticulous work • Marketing boost
12. 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…)
13. –Gwen Stefani “What you waiting for ?”