Document Revision History
This table describes the changes to NSOperation Class Reference.
|2012-01-09||Updated the information about completion blocks to reflect that they should not be used to queue additional work related to your operation object's task.|
|2009-04-20||Updated for OS X v10.6.|
|2008-11-19||Updated the guidelines related to KVO compliance.|
|2008-10-15||Clarified cancellation semantics for concurrent operations.|
|2007-04-30||New document describing methods for managing encapsulated tasks.|
© 2012 Apple Inc. All Rights Reserved. (Last updated: 2012-01-09)