How do I import the new logging functions in iOS 10 / Sierra / Xcode 8?

Question

There is a new logging system in iOS 10 and macOS Sierra.

But I can't seem to make it work in Xcode. os_log is not recognized, and neither is any other function / constant mentioned in the docs.

Use of unresolved identifier 'os_log'

Do I need to link a framework or import a header or something? Am I missing something obvious?

Answer 1

In Swift:

import os  os_log("Some message") 

In Objective-C:

#import <os/log.h>  os_log(OS_LOG_DEFAULT, "Some message");