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Leopard Reference
Cocoa is an object-oriented application environment designed for developing Mac OS X native applications. The Cocoa frameworks support rapid development and high productivity. Cocoa provides developers starting new Mac OS X projects the fastest way to full-featured implementations. Applications from other platforms can also be brought to Mac OS X quickly using Cocoa.

A guided introduction and learning path for developers new to Cocoa.   Essential information for developers using Objective-C.   Objective-C API references organized by framework.
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NSComboBoxDataSource Protocol Reference (HTML) (PDF)
Describes the interface for receiving data requests from an NSComboBox object.
User Experience 2006-05-23
NSComparisonMethods Protocol Reference (HTML) (PDF)
Describes the interface for default comparison methods in the NSSpecifierTest class.
Scripting & Automation 2006-05-23
NSCopying Protocol Reference (HTML) (PDF)
Describes the interface for providing immutable duplicates of objects.
Design Guidelines, Objective-C Language 2006-05-23
NSCountCommand Class Reference (HTML) (PDF)
Describes the class used to count the number of objects of a specified class in the specified object container.
Scripting & Automation 2006-05-23
NSCreateCommand Class Reference (HTML) (PDF)
Describes the class used to create a specified scriptable object.
Scripting & Automation 2006-05-23
NSDecimalNumberBehaviors Protocol Reference (HTML) (PDF)
Describes the interface for controlling the behavior of NSDecimalNumber objects.
Data Management 2006-05-23
NSDeleteCommand Class Reference (HTML) (PDF)
Describes the class used to delete a specified scriptable object or objects.
Scripting & Automation 2006-05-23
NSDeserializer Class Reference (HTML) (PDF)
Describes a deprecated technology replaced by the NSPropertyListSerialization class.
Objective-C Language 2006-05-23
NSDrawer Class Reference (HTML) (PDF)
Describes a retractable user interface element that displays view objects.
User Experience 2006-05-23
NSEditor Protocol Reference (HTML) (PDF)
Describes the interface used to commit or discard edits.
Data Management 2006-05-23
NSEditorRegistration Protocol Reference (HTML) (PDF)
Describes the interface for receiving uncommitted-change messages from Cocoa bindings-compatible views.
Data Management 2006-05-23
NSExistsCommand Class Reference (HTML) (PDF)
Describes the class used to determine whether a specified scriptable object exists.
Scripting & Automation 2006-05-23
NSForm Class Reference (HTML) (PDF)
Describes a vertical matrix of NSFormCell objects.
User Experience 2006-05-23
NSFormCell Class Reference (HTML) (PDF)
Describes a title and text entry field in an NSForm object.
User Experience 2006-05-23
NSGetCommand Class Reference (HTML) (PDF)
Describes the class used to get the specified value or object from the specified scriptable object.
Scripting & Automation 2006-05-23
NSGlyphGenerator Class Reference (HTML) (PDF)
Describes a glyph generator for text layout.
Text & Fonts 2006-05-23
NSHTTPCookieStorage Class Reference (HTML) (PDF)
Describes a collection of cookies shared across all applications.
Internet & Web, Networking 2006-05-23
NSHTTPURLResponse Class Reference (HTML) (PDF)
Describes a response to an HTTP request.
Internet & Web, Networking 2006-05-23
NSIgnoreMisspelledWords Protocol Reference (HTML) (PDF)
Describes the interface for a spelling checker's ignored words list.
Text & Fonts 2006-05-23
NSLogicalTest Class Reference (HTML) (PDF)
Describes the class used to perform logical operations in determining the scriptable objects a command acts on.
Scripting & Automation 2006-05-23
NSMessagePort Class Reference (HTML) (PDF)
Describes an endpoint for distributed object connections or interprocess messaging.
Interapplication Communication, Networking 2006-05-23
NSMetadataItem Class Reference (HTML) (PDF)
Describes the metadata of a file.
File Management 2006-05-23
NSMiddleSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify the middle object in a collection.
Scripting & Automation 2006-05-23
NSMoveCommand Class Reference (HTML) (PDF)
Describes the class used to move the specified scriptable object or objects.
Scripting & Automation 2006-05-23
NSMutableAttributedString Additions Reference (HTML) (PDF)
Describes additions for setting attributes of mutable attributed strings.
Data Management, Text & Fonts 2006-05-23
NSMutableCharacterSet Class Reference (HTML) (PDF)
Describes a mutable set of characters.
Data Management 2006-05-23
NSMutableCopying Protocol Reference (HTML) (PDF)
Describes the interface for providing mutable duplicates of objects.
Design Guidelines, Objective-C Language 2006-05-23
NSMutableIndexSet Class Reference (HTML) (PDF)
Describes a mutable collection of unique unsigned integers.
Data Management 2006-05-23
NSMutableURLRequest Class Reference (HTML) (PDF)
Describes a mutable request for a resource identified by a URL.
Internet & Web, Networking 2006-05-23
NSNameSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an object in a collection (or container) by name.
Scripting & Automation 2006-05-23
NSNull Class Reference (HTML) (PDF)
Describes an object that represents null.
Data Management 2006-05-23
NSObjCTypeSerializationCallBack Protocol Reference (HTML) (PDF)
Describes a deprecated technology.
Data Management 2006-05-23
NSParagraphStyle Class Reference (HTML) (PDF)
Describes an immutable paragraph style.
Text & Fonts 2006-05-23
NSPlaceholders Protocol Reference (HTML) (PDF)
Describes the interface for providing default display values when a Cocoa bindings attribute returns a selection marker.
Data Management 2006-05-23
NSPreferencePane Class Reference (HTML) (PDF)
Defines the interface for subclasses to provide preference panes to System Preferences or other applications.
User Experience 2006-05-23
NSPropertySpecifier Class Reference (HTML) (PDF)
Describes the class used to specify a simple attribute value, a one-to-one relationship, or all elements of a to-many relationship.
Scripting & Automation 2006-05-23
NSProtocolChecker Class Reference (HTML) (PDF)
Describes an object that restricts the messages that can be sent to another object.
Objective-C Language 2006-05-23
NSQuitCommand Class Reference (HTML) (PDF)
Describes the class used to quit the specified application.
Scripting & Automation 2006-05-23
NSRandomSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an arbitrary object in a collection.
Scripting & Automation 2006-05-23
NSRangeSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify a range of objects in a container through two delimiting objects.
Scripting & Automation 2006-05-23
NSRulerMarker Class Objective-C Reference (HTML) (PDF)
Describes a marker on a ruler, such as a tab setting.
Text & Fonts 2006-05-23
NSRulerView Class Reference (HTML) (PDF)
Describes a ruler, with markers, that adjoins a scroll view's document view.
Text & Fonts 2006-05-23
NSScriptCoercionHandler Class Reference (HTML) (PDF)
Describes the class that provides a mechanism for converting one kind of scripting data to another.
Scripting & Automation 2006-05-23
NSScriptExecutionContext Class Reference (HTML) (PDF)
Describes the class that provides a shared instance of the context in which the current script command is executed.
Scripting & Automation 2006-05-23
NSScriptingComparisonMethods Protocol Reference (HTML) (PDF)
Describes the informal protocol used to define a set of methods for comparing script objects.
Scripting & Automation 2006-05-23
NSScriptObjectSpecifiers Protocol Reference (HTML) (PDF)
Describes the informal protocol used by scriptable objects to provide a fully specified object specifier to themselves.
Scripting & Automation 2006-05-23
NSScriptWhoseTest Class Reference (HTML) (PDF)
Describes the abstract class used to represent expressions for testing scriptable object inclusion.
Scripting & Automation 2006-05-23
NSScrollView Class Reference (HTML) (PDF)
Describes a view for displaying content larger than its bounds.
Graphics & Imaging, User Experience 2006-05-23
NSSearchField Class Reference (HTML) (PDF)
Describes a text field optimized for entering a search query.
User Experience 2006-05-23
NSSecureTextField Class Reference (HTML) (PDF)
Describes a text field that hides its text.
Text & Fonts, User Experience 2006-05-23
NSSerializer Class Reference (HTML) (PDF)
Describes a deprecated technology replaced by the NSPropertyListSerialization class.
Data Management 2006-05-23
NSSetCommand Class Reference (HTML) (PDF)
Describes the class used to set values in a scriptable object.
Scripting & Automation 2006-05-23
NSSimpleHorizontalTypesetter Class Reference (HTML) (PDF)
Deprecated - Describes the deprecated technology replaced by NSATSTypesetter.
Text & Fonts 2006-05-23
NSSlider Class Reference (HTML) (PDF)
Describes a control for selecting a value from a continuous range of values.
User Experience 2006-05-23
NSSliderCell Class Reference (HTML) (PDF)
Describes an action cell that provides appearance and behavior for an NSSlider object.
User Experience 2006-05-23
NSStepper Class Reference (HTML) (PDF)
Describes a control that can increment and decrement a value.
User Experience 2006-05-23
NSStepperCell Class Reference (HTML) (PDF)
Describes an action cell that provides appearance and behavior for an NSStepper object.
User Experience 2006-05-23
NSTableHeaderCell Class Reference (HTML) (PDF)
Describes the user interface of a column header of a table view.
User Experience 2006-05-23
NSTableHeaderView Class Reference (HTML) (PDF)
Describes a column header of a table view.
User Experience 2006-05-23
NSTabView Class Reference (HTML) (PDF)
Describes a view that supports switching between subviews.
User Experience 2006-05-23
NSTabViewItem Class Reference (HTML) (PDF)
Describes a single view in a tab view.
User Experience 2006-05-23
NSTextAttachment Class Reference (HTML) (PDF)
Describes a text attachment for an attributed string.
Text & Fonts 2006-05-23
NSTextAttachmentCell Class Reference (HTML) (PDF)
Describes the user interface for a text attachment.
Text & Fonts 2006-05-23
NSTextAttachmentCell Protocol Reference (HTML) (PDF)
Describes the interface for drawing text attachments.
Objective-C Language 2006-05-23
NSTextBlock Class Reference (HTML) (PDF)
Describes a block of text laid out in a subregion of a text container.
Text & Fonts 2006-05-23
NSTextContainer Class Reference (HTML) (PDF)
Describes an area where text is laid out.
Text & Fonts 2006-05-23
NSTextInput Protocol Reference (HTML) (PDF)
Descibes the formal protocol that text views implement to receive input from the user's keyboard and mouse.
Events & Other Input, Text & Fonts 2006-05-23
NSTextList Class Reference (HTML) (PDF)
Describes a section of text that forms a single list.
Text & Fonts 2006-05-23
NSTextStorage Class Reference (HTML) (PDF)
Describes the text storage system.
Text & Fonts 2006-05-23
NSTextTab Class Reference (HTML) (PDF)
Describes a tab in a paragraph style.
Text & Fonts 2006-05-23
NSTextTableBlock Class Reference (HTML) (PDF)
Describes a block of text that appears as a cell within a table.
Text & Fonts 2006-05-23
NSToolbarItemValidation Protocol Reference (HTML) (PDF)
Describes the interface for providing customized enabling and disabling of a toolbar item.
User Experience 2006-05-23
NSToolTipOwner Protocol Reference (HTML) (PDF)
Describes the interface for receiving requests for tooltip text.
User Experience 2006-05-23
NSUnarchiver Class Reference (HTML) (PDF)
Describes an object that extracts the contents of an archive created by NSArchiver.
Data Management 2006-05-23
NSUniqueIDSpecifier Class Reference (HTML) (PDF)
Describes the class used to specify an object in a container by unique ID.
Scripting & Automation 2006-05-23
NSURL Additions Reference (HTML) (PDF)
Describes additions to support pasteboards.
Internet & Web, Networking 2006-05-23
NSURLAuthenticationChallenge Class Reference (HTML) (PDF)
Describes a challenge from a server requiring authentication from the client.
Internet & Web, Networking 2006-05-23
NSURLAuthenticationChallengeSender Protocol Reference (HTML) (PDF)
Describes the interface for receiving authentication challenges.
Internet & Web, Networking 2006-05-23
NSURLCredentialStorage Class Reference (HTML) (PDF)
Describes a mapping of credentials to their corresponding protection spaces.
Internet & Web, Networking 2006-05-23
NSURLDownload Class Reference (HTML) (PDF)
Describes a connection used to download data to a file.
Internet & Web, Networking 2006-05-23
NSURLHandleClient Protocol Reference (HTML) (PDF)
Describes a deprecated technology replaced by the NSURLDownload class.
Internet & Web, Networking 2006-05-23
NSURLProtectionSpace Class Reference (HTML) (PDF)
Describes an area on a server that requires authentication of URL load requests.
Internet & Web, Networking 2006-05-23
NSURLProtocolClient Protocol Reference (HTML) (PDF)
Describes the interface used by protocol objects to communicate with the URL loading system.
Internet & Web, Networking 2006-05-23
NSUserDefaultsController Class Reference (HTML) (PDF)
Describes a Cocoa bindings-compatible manager for user preferences.
Data Management 2006-05-23
NSUserInterfaceValidations Protocol Reference (HTML) (PDF)
Describes the interface for participating in automatic enabling and disabling of controls.
User Experience 2006-05-23
NSViewAnimation Class Reference (HTML) (PDF)
Describes an animation in a view or window.
Graphics & Imaging, User Experience 2006-05-23
NSWindowController Class Reference (HTML) (PDF)
Describes an object for controlling a window that is usually stored in a nib file.
Design Guidelines 2006-05-23
NSWindowScripting Protocol Reference (HTML) (PDF)
Describes the category on NSWindow for scripting basic properties and commands of windows in scriptable applications.
Scripting & Automation, User Experience 2006-05-23
PDFAnnotationCircle Class Reference (HTML) (PDF)
Describes the class for manipulating circle annotations in PDF documents.
Graphics & Imaging 2006-05-23
PDFAnnotationInk Class Reference (HTML) (PDF)
Describes the class for manipulating ink annotations in PDF documents.
Graphics & Imaging 2006-05-23
PDFAnnotationLink Class Reference (HTML) (PDF)
Describes the class for manipulating link annotations in PDF documents.
Graphics & Imaging 2006-05-23
PDFAnnotationMarkup Class Reference (HTML) (PDF)
Describes the class for manipulating markup annotations (highlighting, underlining, and so on) in PDF documents.
Graphics & Imaging 2006-05-23
PDFAnnotationSquare Class Reference (HTML) (PDF)
Describes the class for manipulating square annotations in PDF documents.
Graphics & Imaging 2006-05-23
PDFBorder Class Reference (HTML) (PDF)
Describes the class for creating and manipulating borders around annotations in PDF documents.
Graphics & Imaging 2006-05-23
Preference Panes Framework Reference (HTML) (PDF)
Describes the Objective-C API for supporting and working with preference panes.
General, User Experience 2006-05-23
QTKit Data Types Reference (HTML) (PDF)
Describes the data types and constants in the QTKit framework.
QuickTime 2006-05-23
Screen Saver Framework Reference (HTML) (PDF)
Describes the Objective-C API for supporting and working with screen effects.
General, User Experience 2006-05-23
Screen Saver Functions Reference (HTML) (PDF)
Describes functions and function-like macros available in the Screen Saver framework.
User Experience 2006-05-23
ScreenSaverDefaults Class Reference (HTML) (PDF)
Describes the class that defines a set of methods for saving and restoring user defaults for screen savers.
User Experience 2006-05-23
ScreenSaverView Class Reference (HTML) (PDF)
Describes the class that defines the interface for subclassers to interact with the screen saver infrastructure.
User Experience 2006-05-23
Security Foundation Framework Reference (HTML) (PDF)
Describes the Security Foundation framework for adding fine-grained control of privileged operations in an application.
Security 2006-05-23
SecurityInterface Data Types Reference (HTML) (PDF)
Describes the data types found in the Security Interface framework.
Security 2006-05-23
SFAuthorizationView Class Reference (HTML) (PDF)
Describes the class that displays a lock icon that indicates a user interface has restricted access.
Security 2006-05-23
SFCertificatePanel Class Reference (HTML) (PDF)
Describes the class that displays one or more certificates in a panel or sheet.
Security 2006-05-23
SFCertificateTrustPanel Class Reference (HTML) (PDF)
Describes the class that enables the user to edit the trust settings in a certificate.
Security 2006-05-23
SFCertificateView Class Reference (HTML) (PDF)
Describes the class that displays the contents of a certificate.
Security 2006-05-23
SFChooseIdentityPanel Class Reference (HTML) (PDF)
Describes the class that allows a user to select an identity from a list.
Security 2006-05-23
SFKeychainSavePanel Class Reference (HTML) (PDF)
Describes the class that displays a sheet or panel that allows the user to create a keychain.
Security 2006-05-23
SFKeychainSettingsPanel Class Reference (HTML) (PDF)
Describes the class that displays a panel or sheet that allows users to change their keychain settings.
Security 2006-05-23
WebDocumentRepresentation Protocol Reference (HTML) (PDF)
Describes the protocol adopted by document representation classes that handle specific MIME types.
User Experience 2006-05-23
WebDocumentSearching Protocol Reference (HTML) (PDF)
Describes the protocol adopted by document view objects to support searching.
User Experience 2006-05-23
WebUndefined Class Reference (HTML) (PDF)
Describes the class used to represent the JavaScript "undefined" value.
User Experience 2006-05-23
Mac OS X ABI Dynamic Loader Reference (HTML) (PDF)
Describes the functions used to access Mach-O files.
Runtime Architecture 2005-11-09
Secure Transport Reference (HTML) (PDF)
Describes the C API for creating a Secure Sockets Layer session over any transport layer.
Security 2004-08-31
NSTableView Class Reference (HTML) (PDF)
Describes a view that displays and manages tabular data.
User Experience