If an image does not convey additional information, maybe it's just used to make the UI look more attractive, it makes sense for VoiceOver to skip it. UIKit: set isAccessibilityElement to false. SwiftUI: create a decorative image explicitly.
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SwiftUI has equivalent accessibility modifiers for some of UIAccessibility's properties in UIKit. Same basic concepts apply. Label: https://developer.apple.com/documentation/swiftui/view/accessibilitylabel(_:)-9ek2h Value: https://developer.apple.com/documentation/swiftui/view/accessibilityvalue(_:)-8esl7 Traits: https://developer.apple.com/documentation/swiftui/view/accessibilityaddtraits(_:) Hint: https://developer.apple.com/documentation/swiftui/view/accessibilityhint(_:)-3i2vu
When making charts accessible, sometimes you may have just too many data points for the user to have to go one by one through all of them. In those cases, you can create accessibility elements that represent meaningful chunks of the graph.
Imagine playing a piano with VoiceOver. You'd have to find the key you want to play and then double tap. It would be a very difficult experience. With the .allowsDirectInteraction accessibility trait, VoiceOver passes through touch gestures. Use carefully! And only when it really makes sense to be able to handle controls directly with touch. Other examples could be a drawing app or some games.
