accessibilityActivate() lets you capture a VoiceOver double tap. This is useful if you are creating a custom component you interact with using complex gestures or VoiceOver navigation gestures. An example: slide to unlock.
https://developer.apple.com/documentation/objectivec/nsobject-swift.class/accessibilityactivate()
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When presenting a UI component that overlays the existing UI, you may have found that VoiceOver starts to randomly jump between the overlaid UI and the elements underneath. To avoid that, you can set its accessibilityViewIsModal to true. When setting the accessibilityViewIsModal to true for a view, VoiceOver will ignore its sibling views, treating it as if it was a modal. Useful when presenting custom popups, popovers, modals, action sheets, etc. https://developer.apple.com/documentation/objectivec/nsobject-swift.class/accessibilityviewismodal
Toggles or UISwitches are often found separated from the label that precedes (and describes) them; with an unclear label; missing a value, trait, or hint; or even not being actionable at all.
It is not just about applying accessibility APIs, but about caring, and thinking of features that can make your app more accessible and inclusive to everyone. Twitter's alt-text feature is a great example. Thanks, @TwitterA11y! You'll be missed.
