If you have interactions that are hidden or require complex gestures to be performed or that may conflict with VoiceOver, you need to provide alternative ways of executing these actions. Custom actions can help a lot of times, but not always.
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VoiceOver has a very cool gesture called the Magic Tap (double tap with two fingers). It should execute the most important task for the current state of the app. Examples: start/stop timer, play/pause music, take a photo, compose a tweet... You just need to override accessibilityPerformMagicTap() to capture that gesture, execute the desired code, and return true if handled successfully. https://developer.apple.com/documentation/objectivec/nsobject-swift.class/accessibilityperformmagictap()
An alternative layout for large font sizes can be provided with Auto Layout by having three sets of constraints (common, default constraints, and alternative constraints) and activate/deactivate them depending on the content size category.
Touch target sizes are recommended to be at least 44 x 44 points. Buttons in the navigation bar ( especially when not using nav bar button items), dismiss buttons, and custom toolbars, are use cases that tend to have smaller sizes.
Content © Daniel Devesa Derksen-Staats — Accessibility up to 11!
