NSAccessibilityProgressIndicator
A role-based protocol that declares the minimum interface necessary for an accessibility element to act as a progress indicator.
Declaration
protocol NSAccessibilityProgressIndicator : NSAccessibilityGroupOverview
Use this protocol when you want a user interface element to behave like a progress indicator—a view that provides visual feedback to the user about the status of an ongoing task—in the accessibility hierarchy.
You can further enhance the adopting element by implementing any of the information properties or action methods that the NSAccessibilityProtocol protocol declares.