WatchKit is a

framework A framework is a generic term commonly referring to an essential supporting structure which other things are built on top of. Framework may refer to: Computing * Application framework, used to implement the structure of an application for an op ...

provided by

Apple An apple is an edible fruit produced by an apple tree (''Malus domestica''). Apple fruit tree, trees are agriculture, cultivated worldwide and are the most widely grown species in the genus ''Malus''. The tree originated in Central Asia, wh ...

to develop

interfaces Interface or interfacing may refer to: Academic journals * Interface (journal), ''Interface'' (journal), by the Electrochemical Society * ''Interface, Journal of Applied Linguistics'', now merged with ''ITL International Journal of Applied Lin ...

for

Apple Watch Apple Watch is a line of smartwatches produced by Apple Inc. It incorporates fitness tracking, health-oriented capabilities, and wireless telecommunication, and integrates with iOS and other Apple products and services. The Apple Watch was rel ...

applications Application may refer to: Mathematics and computing * Application software, computer software designed to help the user to perform specific tasks ** Application layer, an abstraction layer that specifies protocols and interface methods used in a c ...

. To develop using WatchKit, Apple provides more information and resources in the WatchKit

library A library is a collection of materials, books or media that are accessible for use and not just for display purposes. A library provides physical (hard copies) or digital access (soft copies) materials, and may be a physical location or a vir ...

. WatchKit contains all the classes that a WatchKit extension uses to develop an application.

Classes

WatchKit provides some classes for general purposes, as representing controllers, interfaces and alert actions. Also provides support for file management, through the following classes: And a set of classes that inherit from WKInterfaceObject and represents visual UI elements.

Protocols

WatchKit provides two protocols: WKExtensionDelegate and WKImageAnimatable. WKExtensionDelegate is intended to manage the behaviour of the WatchKit extension and WKImageAnimatable controls the playback of animated images.

References

Apple Watch {{technology-stub