Sends a default-level message to the logging system.
- iOS 10.0+
- macOS 10.12+
- tvOS 10.0+
- watchOS 3.0+
A constant string or format string that produces a human-readable log message. See Formatting Log Messages.
Call this function to capture information about things that might result a failure. Default-level messages sent by this function are initially stored in memory. Without a configuration change, they are moved to the data store as memory buffers fill. They remain there until the storage quota is exceeded, at which point, the oldest messages are purged.
Calling this function is equivalent to calling the
os function and specifying a log type of
OS. Note that lengthy log messages may be truncated when stored by the logging system.