A Boolean value indicating whether the accessibility elements contained within this accessibility element are hidden.
The default value for this property is NO. You might use this property to hide views that are covered by the arrival of a new view. In this case, the hidden views might remain visible onscreen, but they are not the focus of the user’s actions.
You might also use this property to hide a transient view that VoiceOver users don’t need to notice. For example, VoiceOver doesn’t need to describe the translucent view that appears when users adjust the volume on their devices, because the aural feedback of this action is sufficient.