Leopard Reference Library
This page lists new and recently changed documents, including Articles, Guides, Reference, Release Notes, Sample Code, Technical Notes, and Technical Q&As. Most documents have a revision history, which details additions and changes to that document since the previous version. Look for "Revision History" at the bottom of the document or in the document's table of contents.

Items are listed in reverse chronological order by publication date. To see the list sorted by the type of revision, click Sort by Revision Type. Items published for the first time (First Version) will be at the top of the list, followed by items with new or changed content (Content Update), followed by items with small fixes, such as typos and format errors, but no significant content changes (Minor Change).

New and updated Reference Library documents are announced in the bi-weekly Apple Developer Connection News, available as an option to ADC members. See the Membership Overview page for details on joining.
Document Revision Descriptions
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2009-03-04 Core Data Overview (HTML)
First version of a new document that describes a roadmap for learning Core Data.
 Minor Change Getting Started Data Management
2009-05-06 Binary Data Programming Guide for Cocoa (HTML) (PDF)
Corrected the code listing under Modifying Bytes to account for the null terminator on the strings.
 Minor Change Guides Data Management
2009-05-06 CFNetwork Programming Guide (HTML) (PDF)
Corrected typos.
 Minor Change Guides Networking, Security
2009-05-06 Image Unit Tutorial (HTML) (PDF)
Updated line 7 of listing 2-7.
 Minor Change Guides Graphics & Imaging
2009-05-06 Key-Value Observing Programming Guide (HTML) (PDF)
Clarified Core Data requirement in Registering Dependent Keys.
 Minor Change Guides Data Management, Design Guidelines
2009-05-06 Memory Management Programming Guide for Cocoa (HTML) (PDF)
Corrected typographical errors.
Minor Change Guides Design Guidelines, Objective-C Language
2009-05-06 The Objective-C 2.0 Programming Language (HTML) (PDF)
Updated article on Mixing Objective-C and C++.
 Minor Change Guides Objective-C Language, Tools
2009-05-06 Predicate Programming Guide (HTML) (PDF)
Corrected a typographical error.
 Minor Change Guides Data Management, Design Guidelines
2009-05-06 Stream Programming Guide for Cocoa (HTML) (PDF)
Added a missing comment to a code sample.
 Minor Change Guides Data Management, Networking
2009-04-08 Text System Overview (HTML) (PDF)
Added link in "Building a Text Editor in 15 Minutes" to information explaining how to configure an application's document types settings.
 Minor Change Guides Text & Fonts
2009-03-12 Keychain Services Programming Guide (HTML) (PDF)
Corrected a typo.
 Minor Change Guides Security
2009-03-08 Cocoa Bindings Programming Topics (HTML) (PDF)
Added warning about lack of key-value observing change values to Controller Key-Value Observing Compliance.
 Minor Change Guides Design Guidelines, User Experience
2009-03-05 Low-Level File Management Programming Topics (HTML) (PDF)
Corrected a broken link.
 Minor Change Guides File Management
2009-03-04 Color Programming Topics for Cocoa (HTML) (PDF)
Removed statement that drawing to printers doesn't support alpha.
 Minor Change Guides Graphics & Imaging
2009-03-04 Core Data Programming Guide (HTML) (PDF)
Minor revision to accommodate new Getting Started document.
 Minor Change Guides Data Management, Design Guidelines
2009-03-04 Core Data Snippets (HTML) (PDF)
New document that provides snippets of code that you can use when writing a program that uses Core Data.
 First Version Guides Data Management
2009-03-04 Core Data Utility Tutorial (HTML) (PDF)
Updated title to better reflect purpose.
 Minor Change Guides Data Management, Design Guidelines
2009-03-04 Dock Tile Programming Guide (HTML) (PDF)
Updated to include guidelines for Cocoa programmers.
 Content Update Guides User Experience
2009-03-04 Error Handling Programming Guide For Cocoa (HTML) (PDF)
Corrected a link error.
 Minor Change Guides Design Guidelines, Objective-C Language
2009-03-03 64-Bit Transition Guide for Cocoa (HTML) (PDF)
Updated to add a section on tuning memory usage in 64-bit Cocoa applications.
 Content Update Guides Design Guidelines
2009-02-04 Archives and Serializations Programming Guide for Cocoa (HTML) (PDF)
Replaced instances of "/tmp" with NSTemporaryDirectory().
 Minor Change Guides Data Management
2009-02-04 Cocoa Event-Handling Guide (HTML) (PDF)
Added Mac OS X v10.5 details about scroll-wheel events and key equivalents.
 Minor Change Guides Events & Other Input
2009-02-04 Collections Programming Topics for Cocoa (HTML) (PDF)
Corrected a code example showing indexOfObjectIdenticalTo:.
 Minor Change Guides Data Management
2009-02-04 Dashboard Programming Topics (HTML) (PDF)
Made minor corrections.
 Minor Change Guides Apple Applications
2009-02-04 Dialogs and Special Panels (HTML) (PDF)
Updated for Mac OS X v10.5: added "Customizing Alert Dialogs," which describes the suppression checkbox and accessory views.
 Minor Change Guides User Experience
2009-02-04 Key-Value Coding Programming Guide (HTML) (PDF)
Added substantial task information and sample code.
 Content Update Guides Data Management, Design Guidelines
2009-02-04 Mac OS X ABI Function Call Guide (HTML) (PDF)
Made content corrections.
 Minor Change Guides Intel-Based Macs
2009-02-04 NSPersistentDocument Core Data Tutorial (HTML) (PDF)
Updated description of editing the plist file.
 Minor Change Guides Data Management, Design Guidelines
2009-02-04 NSPersistentDocument Core Data Tutorial for Mac OS X v10.4. (HTML) (PDF)
Re-release of Mac OS X v10.4 version of NSPersistentDocument Core Data Tutorial.
 First Version Guides Data Management, Design Guidelines
2009-02-04 Objective-C 2.0 Runtime Programming Guide (HTML) (PDF)
Corrected typographical errors.
Minor Change Guides Objective-C Language, Runtime Architecture
2009-02-04 Toolbar Programming Topics for Cocoa (HTML) (PDF)
Updated for Mac OS X v10.5 (Leopard).
 Minor Change Guides User Experience
2009-02-04 Tree-Based XML Programming Guide for Cocoa (HTML) (PDF)
Replaced use of deprecated method loadDataRepresentation:ofType: with readFromData:ofType:error:.
 Minor Change Guides Data Management, Internet & Web
2009-02-04 Universal Binary Programming Guidelines, Second Edition (HTML) (PDF)
Made minor content additions.
 Minor Change Guides Intel-Based Macs, Porting
2009-02-04 Window Programming Guide for Cocoa (HTML) (PDF)
Added information on the use of backing locations to improve performance.
 Minor Change Guides User Experience
2009-02-04 Xcode Design Tools for Class Modeling (HTML) (PDF)
Made minor content fixes.
 Minor Change Guides Design Guidelines, Tools
2009-01-12 Document-Based Applications Overview (HTML) (PDF)
Removed private constant from document types listing.
 Minor Change Guides Design Guidelines
2009-01-06 Authorization Services Programming Guide (HTML) (PDF)
Corrected minor errors. Changed the title from "Performing Privileged Operations With Authorization Services."
 Minor Change Guides Security
2009-01-06 Cocoa Drawing Guide (HTML) (PDF)
Updated the guidelines associated with resolution independent drawing.
 Minor Change Guides Graphics & Imaging
2009-01-06 Internationalization Programming Topics (HTML) (PDF)
Fixed the ibtool examples to use the updated syntax.
 Minor Change Guides Internationalization
2009-01-06 Resource Programming Guide (HTML) (PDF)
Added information about KVO notifications during nib loading.
 Minor Change Guides Resource Management
2009-01-06 Web Services Core Programming Guide (HTML) (PDF)
Updated text and sample code. Moved API reference information to "Web Services Core Reference".
 Minor Change Guides Internet & Web, Networking
2009-01-06 Xcode Overview (HTML) (PDF)
Made minor changes and added glossary.
 Minor Change Guides Tools
2009-01-06 Xcode Project Management Guide (HTML) (PDF)
Made minor content changes.
 Minor Change Guides Tools
2009-01-06 Xcode Workspace Guide (HTML) (PDF)
Made minor content fixes.
 Minor Change Guides Tools
2008-11-19 Certificate, Key, and Trust Services Programming Guide (HTML) (PDF)
Added information about, and code samples for, iPhone OS.
 Content Update Guides Security
2008-11-19 Cocoa Fundamentals Guide (HTML) (PDF)
Made various small corrections.
 Content Update Guides Design Guidelines
2008-11-19 Code Signing Guide (HTML) (PDF)
Added a chapter describing the code signing requirement language.
 Content Update Guides Security
2008-11-19 Garbage Collection Programming Guide (HTML) (PDF)
Added note that Foundation programs need to use objc_startCollectorThread().
 Minor Change Guides Design Guidelines, Objective-C Language, Performance, Runtime Architecture
2008-11-19 Interface Builder User Guide (HTML) (PDF)
Updated to incorporate information about nib files in iPhone OS.
 Minor Change Guides Tools
2008-11-19 Object-Oriented Programming with Objective-C (HTML) (PDF)
Corrected typographical errors.
Minor Change Guides Design Guidelines, Objective-C Language
2008-11-19 Property List Programming Guide (HTML) (PDF)
Combined Cocoa and Core Foundation documents on property lists and reorganized material. Added a "Quick Start" mini-tutorial and a chapter on programmatically creating property lists. Mentioned iPhone OS as a platform on which property lists are important.
 Content Update Guides Data Management
2008-11-19 Timer Programming Topics for Cocoa (HTML) (PDF)
Corrected typographical errors.
 Minor Change Guides Events & Other Input
2008-11-13 Core Animation Programming Guide (HTML) (PDF)
Introduces iPhone SDK content to Mac OS X content. Corrects frame animation capabilities.
 Content Update Guides Graphics & Imaging
2008-10-15 Animation Overview (HTML) (PDF)
Corrected typos.
 Minor Change Guides Games, Graphics & Imaging
2008-10-15 Button Programming Topics for Cocoa (HTML) (PDF)
Added "Querying Button Matrices" plus a example of programmatically creating a matrix of radio buttons. Also removed "Deprecated Buttons" from "Types of Buttons".
 Minor Change Guides User Experience
2008-10-15 Control and Cell Programming Topics for Cocoa (HTML) (PDF)
Made minor corrections.
 Minor Change Guides User Experience
2008-10-15 Data Formatting Programming Guide for Cocoa (HTML) (PDF)
Corrected typographical errors.
 Minor Change Guides Data Management
2008-10-15 Mac OS X Technology Overview (HTML) (PDF)
Removed outdated reference to jikes compiler. Marked the AppleShareClient framework as deprecated, which it was in Mac OS X v10.5.
 Minor Change Guides Accessibility
2008-10-15 NSNetServices and CFNetServices Programming Guide (HTML) (PDF)
Updated code listings.
 Minor Change Guides Networking
2008-10-15 Quartz Composer Programming Guide (HTML) (PDF)
Added description of "onloading" HTML attribute in Quartz Composer WebKit plug-in.
 Minor Change Guides Graphics & Imaging
2008-10-15 Security Overview (HTML) (PDF)
Added a link to the iPhone OS Technology Overview.
 Content Update Guides Security
2008-10-15 String Programming Guide for Cocoa (HTML) (PDF)
Added new aricle on character clusters; updated list of string format specifiers.
 Minor Change Guides Data Management, Text & Fonts
2008-10-15 Text Layout Programming Guide for Cocoa (HTML) (PDF)
Added information on thread safety to "The Layout Manager" article.
 Minor Change Guides Text & Fonts
2008-10-15 WebKit DOM Programming Topics (HTML) (PDF)
Minor edits throughout.
 Minor Change Guides Internet & Web
2008-10-15 WebKit Objective-C Programming Guide (HTML) (PDF)
Minor edits throughout.
 Minor Change Guides Graphics & Imaging, Internet & Web, User Experience
2008-10-15 WebKit Plug-In Programming Topics (HTML) (PDF)
Added information regarding alternatives to plug-in development.
 Minor Change Guides Internet & Web
2008-10-15 Xcode Quick Tour for Mac OS X (HTML) (PDF)
Added information about how to implement the Converter application.
 Minor Change Guides Tools
2008-09-09 Event-Driven XML Programming Guide for Cocoa (HTML) (PDF)
Added note about introduction of namespace support in v10.4.
 Minor Change Guides Data Management
2009-05-06 Foundation Constants Reference (HTML) (PDF)
Corrected the definition of NSDecimalNoScale.
 Minor Change Reference Data Management, Objective-C Language
2009-05-06 IMKServerInput Protocol Reference (HTML) (PDF)
Clarified constant descriptions.
 Minor Change Reference Internationalization, Text & Fonts
2009-05-06 NSAnimatablePropertyContainer Protocol Reference (HTML) (PDF)
Corrected typos.
 Minor Change Reference Graphics & Imaging
2009-05-06 NSCountedSet Class Reference (HTML) (PDF)
Referenced CFBag, which implements similar functionality.
 Minor Change Reference Data Management
2009-05-06 NSData Class Reference (HTML) (PDF)
Added subclassing notes. Clarified behavior of bytes and getData:length: methods.
 Minor Change Reference Data Management
2009-05-06 NSError Class Reference (HTML) (PDF)
Added a link to the Foundation error constants.
 Minor Change Reference Design Guidelines
2009-05-06 NSSegmentedCell Class Reference (HTML) (PDF)
Added missing API.
 Minor Change Reference User Experience
2009-05-06 NSSegmentedControl Class Reference (HTML) (PDF)
Added missing API.
 Minor Change Reference User Experience
2009-05-06 QTCaptureDevice Class Reference (HTML) (PDF)
Fixed enumeration and constant listings. Minor fixes.
 Minor Change Reference QuickTime
2009-05-06 Search Kit Reference (HTML) (PDF)
Added notes that SKSearch and SKIndex objects cannot be used with CFMakeCollectable.
 Minor Change Reference Data Management, Text & Fonts, User Experience
2009-04-08 CalCalendarStore Class Reference (HTML) (PDF)
Minor edits throughout.
 Minor Change Reference Apple Applications
2009-04-08 NSButtonCell Class Reference (HTML) (PDF)
Added style override details to setAttributedTitle:.
 Minor Change Reference Events & Other Input, User Experience
2009-04-08 NSDictionary Class Reference (HTML) (PDF)
Corrected typographical errors.
 Minor Change Reference Data Management, Design Guidelines
2009-04-08 NSNetService Class Reference (HTML) (PDF)
Miscellaneous edits.
 Minor Change Reference Interapplication Communication, Internet & Web, Networking
2009-04-08 NSNetServiceBrowser Class Reference (HTML) (PDF)
Miscellaneous edits.
 Minor Change Reference Interapplication Communication, Internet & Web, Networking
2009-04-08 NSScroller Class Reference (HTML) (PDF)
Updated for Mac OS X v10.5.
 Content Update Reference User Experience
2009-04-08 NSSplitView Class Reference (HTML) (PDF)
Added splitView:shouldHideDividerAtIndex: delegate method. Added divider style and color methods.
 Content Update Reference User Experience
2009-04-08 NSUserDefaults Class Reference (HTML) (PDF)
Updated property list storage details.
 Minor Change Reference Data Management, User Experience
2009-04-08 QTCaptureAudioPreviewOutput Class Reference (HTML) (PDF)
Fixed parameter descriptions.
 Minor Change Reference QuickTime
2009-04-08 QTCaptureDeviceInput Class Reference (HTML) (PDF)
Minor fixes.
 Minor Change Reference QuickTime
2009-04-08 QTCaptureInput Class Reference (HTML) (PDF)
Minor technical fixes.
 Minor Change Reference QuickTime
2009-04-08 QTCaptureView Class Reference (HTML) (PDF)
Modified descriptions. Fixed typos. MInor fixes.
 Minor Change Reference QuickTime
2009-04-08 QTDataReference Class Reference (HTML) (PDF)
Added parameter descriptions, updated constant listings. Minor fixes.
 Minor Change Reference QuickTime
2009-04-08 WebArchive Class Reference (HTML) (PDF)
Minor edits throughout.
 Minor Change Reference User Experience
2009-04-08 WebEditingDelegate Protocol Reference (HTML) (PDF)
Minor edits throughout.
 Minor Change Reference User Experience
2009-04-08 WebFrame Class Reference (HTML) (PDF)
Added separate parameter and return value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebFrameLoadDelegate Protocol Reference (HTML) (PDF)
Added separate parameter and return value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebJavaPlugIn Protocol Reference (HTML) (PDF)
Added separate parameter and return-value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebOpenPanelResultListener Protocol Reference (HTML) (PDF)
Added separate parameter and return-value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebPlugIn Protocol Reference (HTML) (PDF)
Added separate parameter and return-value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebPlugInContainer Protocol Reference (HTML) (PDF)
Added separate parameter and return value descriptions.
 Minor Change Reference User Experience
2009-04-08 WebPlugInViewFactory Protocol Reference (HTML) (PDF)
Added separate parameter and return value descriptions.
 Minor Change Reference User Experience
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