/System/Library/Frameworks

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A framework is a dynamic library and resources for that library, such as images and localization strings. Frameworks have the file extension .framework.

In iOS there are two kinds of frameworks: public frameworks and private frameworks. Public frameworks are allowed to be used in App Store apps. Private frameworks are intended to be used only by Apple's apps, and are more unstable against firmware changes, but many of the interesting features are in the private frameworks.

Since iOS 3.1, all default (private and public) libraries have been combined into a big cache file in /System/Library/Caches/com.apple.dyld/dyld_shared_cache_armX (where X can be v6, v7, v7s or 64) to improve performance. See dyld_shared_cache. The original libraries are no longer useful for non-on-device-developers, so they are eliminated from the system. The framework folders still contain other resources, such as localization strings.

Private Frameworks

See /System/Library/PrivateFrameworks.

Public Frameworks

Resources for public frameworks can be found inside /System/Library/Frameworks.

Framework 1.x 2.x 3.x 4.x 5.x 6.x 7.x Prefix Language Description
Accelerate No No No Yes Yes Yes Yes cblas, vDSP C Vector and Matrix math, digital signal processing, large number handling, and image processing
Accounts No No No No Yes Yes Yes AC Obj-C Provides access to accounts in the Accounts database. Allows creation of accounts if none exsist. Only Twitter is avaliable in iOS 5.0 and later.
AddressBook Yes Yes Yes Yes Yes Yes Yes AB Obj-C Provides access to the Address Book database.
AddressBookUI Yes Yes Yes Yes Yes Yes Yes
AdSupport No No No No No Yes Yes AS Obj-C Provides access to identifiers for serving adverts and a flag that indicates if limited tracking is on.
AppSupport Yes No No No No No No
AppleBasebandManager No No No No No No Yes
ArtworkCache Partial No No No No No No Introduced in iOS 1.1.x.
AssetsLibrary No No No Yes Yes Yes Yes AL Obj-C Used to access pictures and videos managed by the Photos application.
AudioToolbox Yes Yes Yes Yes Yes Yes Yes AU, Audio -- Provides interfaces for recording, playback, stream parsing, and managing audio sessions. Part of CoreAudio
AudioUnit No Yes Yes Yes Yes Yes Yes AU, Audio -- Interfaces for the loading of audio units and their use.
AVFoundation No No Yes Yes Yes Yes Yes AV Obj-C Used for playing and recording audio and video.
BluetoothManager Yes No No No No No No
Calculate Partial No No No No No No Introduced in iOS 1.1.x.
Calendar Yes No No No No No No
Camera Yes No No No No No No
Celestial Yes No No No No No No
CFNetwork Yes Yes Yes Yes Yes Yes Yes CF C Intefaces for high-performance networking.
CoreAudio Yes Yes Yes Yes Yes Yes Yes Audio C++ Declares constants and data-types used by other interfaces in CoreAudio.
CoreBluetooth No No No No Yes Yes Yes CB Obj-C Provides access to Bluetooth peripherals (hardware).
CoreData No No Yes Yes Yes Yes Yes NS Obj-C Interfaces for application data model manipulation.
CoreFoundation Yes Yes Yes Yes Yes Yes Yes CF C Basic data management and services
CoreGraphics Yes Yes Yes Yes Yes Yes Yes CG C APIs to interface with the Quartz engine, allows 2D rendering, etc.
CoreImage No No No No Yes Yes Yes CI Obj-C Interfaces for manipulating images and video.
CoreLocation No Yes Yes Yes Yes Yes Yes CL Obj-C Iterfaces for determining location.
CoreMedia No No No Yes Yes Yes Yes CM C Low-level routines for manipulating audio and video.
CoreMIDI No No No Yes Yes Yes Yes MIDI Obj-C Routines for handling MIDI data. Only avaliable on iOS 4.2 and later. Part of Core Audio.
CoreMotion No No No Yes Yes Yes Yes CM Obj-C, C++ Iterfaces for accessing acceleromtere and gyrometric data.
CoreSurface Yes No No No No No No
CoreTelephony (CoreTelephony) Yes No No Yes Yes Yes Yes CT Obj-C Allows access to Carrier information and information pertaining to a current call.
CoreText No No No Yes Yes Yes Yes CT C++ Text layout and rendering engine.
CoreVideo Yes No No Yes Yes Yes Yes CV -- Low-level routines for manipulating audio and video - Apple advises not to use this framework directly, and although public doesn't document much of it.
DeviceLink Yes No No No No No No
EventKit No No No Yes Yes Yes Yes EK Obj-C Interfaces for accessing Calendar event data. This is a replacement for the older Calendar.framework.
EventKitUI No No No Yes Yes Yes Yes EK Obj-C Classes for system graphical interfaces.
ExternalAccessory No No Yes Yes Yes Yes Yes EA Obj-C Interfaces for communication with attached external accessories via 30-pin dock or BlueTooth, Lightning is not yet mentioned by Apple in documentation.
Foundation Yes Yes Yes Yes Yes Yes Yes NS Obj-C Objetive-C wrappers to features found in CoreFoundation with extra features and functionality not covered by Objetive-C
GameController No No No No No No Yes
GameKit No No Yes Yes Yes Yes Yes GK Obj-C Manages P2P connectivity. With iOS 4.1 and later, GameKit can be used with Game Center (an extension to the framework) to create social games.
GLKit No No No No Yes Yes Yes GLK Obj-C Utility classes for building OpenGL ES applications.
GMM Yes No No No No No No
GraphicsServices Yes No No No No No No
GSS No No No No Yes Yes Yes gss -- Security related services - Apple advises to look at the headers as they provide no documentation.
iAD No No No Yes Yes Yes Yes AD Obj-c Classes for displaying advertisements
IAP Yes No No No No No No
ImageIO No No No Yes Yes Yes Yes CG C++ Input and output for images. Part of CoreGraphics
IOKit Yes Yes Yes Yes Yes Yes Yes -- C++ Low-level framework for communicating with the kernel and hardware. Apple advises not to use this framework directly and will reject it from the AppStore.
IOMobileFramebuffer Yes No No No No No No
ITSync Yes No No No No No No
iTunesStore Partial No No No No No No Introduced in iOS 1.1.x.
JavaScriptCore Yes No No No No No Yes
LayerKit Yes No No No No No No
MapKit No No Yes Yes Yes Yes Yes MK Obj-C Classes for embedding Map graphical interfaces. Pre iOS 5.1 Google Mobile Maps is used to provide map data, post iOS 5.1 Apple provides the map data.
MBX2D Yes No No No No No No
MBXConnect Yes No No No No No No
MeCCA Yes No No No No No No
MediaAccessibility No No No No No No Yes
MediaPlayer No Yes Yes Yes Yes Yes Yes MP Obj-C Provides facilities to play audio, and video. Also allows access to the iPod or 'Music' library.
MediaToolbox No No No No No Yes Yes MT C++ Apple has no reference as of writing, headers appear to suggest audio processing.
Message Yes No No No No No No
MessageUI Yes No Yes Yes Yes Yes Yes MF Obj-C Interfaces for SMS and Mail compose view controller without leaving the application.
MobileBluetooth Yes No No No No No No
MobileCoreServices No No Yes Yes Yes Yes Yes UT C Defines UTIs supported by the system.
MobileMusicPlayer Yes No No No No No No
MultipeerConnectivity No No No No No No Yes
MoviePlayerUI Yes No No No No No No
MultitouchSupport Yes No No No No No No
MusicLibrary Yes No No No No No No
NewsstandKit No No No No Yes Yes Yes NK Obj-C Interfaces for downloading Newsstand application content.
OfficeImport Yes No No No No No No
OpenAL No Yes Yes Yes Yes Yes Yes AL C++ Interface for the cross-platform audio library
OpenGLES Yes Yes Yes Yes Yes Yes Yes EAGL, GL C Interface for the OpenGL ES library.
PassKit No No No No No Yes Yes PK Obj-C Interfaces for creation of Passes for Passbook.app.
PhotoLibrary Yes No No No No No No
Preferences Yes No No No No No No
QuartzCore No Yes Yes Yes Yes Yes Yes CA Obj-C Contains the CoreAntimation interfaces
QuickLook No No No Yes Yes Yes Yes QL Obj-C Interfaces for previewing files of formats you don't handle.
SafariServices No No No No No No Yes
Security Yes Yes Yes Yes Yes Yes Yes CSSM, Sec Obj-C Interfactes for managing keys, trust policies, and certificates.
Social No No No No No Yes Yes SL Obj-C Interfaces for interacting with social accounts. Currently they are Facebook, Twitter, and Sina Weibo.
SpriteKit No No No No No No Yes
StoreKit No No Yes Yes Yes Yes Yes SK Obj-C Interfaces for handling the transactions in in-app purchases.
System Yes Yes Yes Yes Yes Yes Yes
SystemConfiguration Yes Yes Yes Yes Yes Yes Yes SC C++ Iterfaces for determining network availability.
TelephonyUI Yes No No No No No No
Twitter No No No No Yes Yes Yes TW Obj-C Interfaces for sending tweets. In iOS 6.0 and later this should be replaced by Social.framework as it will eventually be deprecated.
UIKit Yes Yes Yes Yes Yes Yes Yes UI Obj-C Classes for iOS UI elements and for the user interface layer of applciations.
URLify Yes No No No No No No
VideoToolbox No No No No No Yes Yes -- -- Interfaces used by the device. Apple states not to include this framework directly.
VisualVoicemail Partial No No No No No No Introduced in iOS 1.1.x.
WebCore Yes No No No No No No
WebKit Yes No No No No No No

Files

  • (none)

Parents

Root/System/Library