If you want to know everything about how to "Tailor the VoiceOver experience in your data-rich apps" with the Accessibility Custom Content API, there is a WWDC21 session.
https://developer.apple.com/videos/play/wwdc2021/10121/
When implementing accessibilityCustomContent, for any supplementary information, it returns an array that VoiceOver will announce in that given order. The value of the AXCustomContent first, then the label.
Users can configure in VoiceOver's verbosity settings if it should say that there's more content available, or play a sound hinting that there is, or simply do nothing. So it should really be optional content as users might miss it.
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WWDC 2009's keynote, Phil Schiller spoke for 36 seconds, about how the iPhone was, two years later, finally accessible. @shelly tells this amazing story in her audio-documentary "36 Seconds That Changed Everything" https://www.36seconds.org/2019/06/19/36-seconds-transcript/ "Apple didn’t develop VoiceOver for Mac out of the goodness of their hearts. They developed VoiceOver for Mac because if they didn’t they were going to be in serious trouble with their key market, which was education," @JonathanMosen says. "They did that thinking a third party would write the screen reader for Mac OS 10, and then when really nobody picked up that mantle to write the screen reader as a third party, Apple stepped in and developed VoiceOver," @jamesdempsey says. "I borrowed a friend’s phone. It was confirmed. The screen was too small, the background too bright, the text too tiny. For the first time in 20 years, Apple had built a product I couldn’t use. I’m fairly sure I cried about that." @shelly Four minutes before the two-hour mark, in the midst of a long list of new apps to be included on the iPhone 3GS, @pschiller switched slides, revealing the iPhone Accessibility settings screen. “VoiceOver is on the iPhone. They did it.” "I bought myself an iPhone at the same time as other people. I didn’t have to wait for a new version of the software, an update to be made, or someone sighted to help me. I could start up VoiceOver and it just worked great." @SteveOfMaine
It is useful to know these VoiceOver gestures to activate/deactivate Screen Curtain, pause/resume VoiceOver, easily simulate a long press for opening context menus, or quickly move the cursor to the screen's first or last elements.
@BeMyEyes, founded by @hjwiberg, enables people who are blind and low vision to identify objects by pairing them with volunteers from around the world using their camera. Winner of an Apple Design Award 2021 for Social Impact.
