Returns the stack of nested activities associated with the current thread.
- iOS 8.0–10.0Deprecated
- macOS 10.10–10.12Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- tvOS 9.0–10.0Deprecated
- watchOS 2.0–3.0Deprecated
A buffer sized to hold the the number of activities being requested.
The number of activities requested.
The number of activities written to
Because activities can be nested, there can be more than one activity involved on the current thread.
This function should be used only by diagnostic tools for making additional determinations about a situation.