Posted by an application when a scroll action has completed and the
accessibility method has been called.
- iOS 4.2+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
This notification includes a parameter, which is an
NSString object that contains a description of the new scroll position. An assistive technology outputs the description string contained in the parameter.
Use this notification to provide custom information about the contents of the screen after a user performs a VoiceOver scroll gesture. For example, a tab-based application might provide a string such as “Tab 3 of 5,” or an application that displays information in pages might provide a string such as “Page 19 of 27.”
When an assistive technology repeatedly receives the same scroll position string, it indicates to users that a border or boundary has been reached.
Post this notification using the