This notification is posted when an NSFileHandle object establishes a socket connection between two processes, creates an NSFileHandle object for one end of the connection, and makes this object available to observers by putting it in the userInfo dictionary.

acceptConnectionInBackgroundAndNotify

acceptConnectionInBackgroundAndNotifyForModes:

NSFileHandle

The notification object is the NSFileHandle object that sent the notification. The userInfo dictionary contains the following information:

KeyValue NSFileHandleNotificationFileHandleItemThe NSFileHandle object representing the “near” end of a socket connection@"NSFileHandleError"An NSNumber object containing an integer representing the UNIX-type error which occurred

Available in Mac OS X v10.0 and later.