Marks an event in your code using a signpost.
- iOS 12.0+
- macOS 10.14+
- Mac Catalyst 13.0+
- tvOS 12.0+
- watchOS 5.0+
A log object to log the signpost to.
A signpost identifier used to disambiguate between signposts with the same name.
The name of the signpost.
Optional. If specified, provide a format string, followed by the expected number of arguments in the order that they appear in the string.