A component can have more than one accessibility trait, they can be combined. A heading can be a button too, for example. Or a button could be selected. You can insert or remove the selected trait to the button, when needed.
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With regular buttons from UIKit or SwiftUI, you are all set. With complex views, headings, or table/collection view cells that, when selected, bring the user somewhere else in the app or perform an action, you'll have to add the button trait.
When implementing a UISlider, it is a good idea to consider how much the slider value should change when swiping up/down to adjust it. It might not always make sense to do it in 10% increments, which is the default behaviour. Could be because the value at those intervals doesn't make sense, or feel random, or because it wouldn't provide the user with a fine enough control being able to go through the whole slider in just 10 swipes. It user will still be able to adjust the slider to any value by double tapping and holding and then moving the finger left or right, bypassing VoiceOver gestures. VoiceOver announces the new value as it changes.
@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.
