WatchKit

An object that manages behaviors that are shared among all of your app’s interface controllers.

A collection of methods you can implement to manage the app-level behavior of your WatchKit extension.

An object that provides information about the user’s Apple Watch.

Ensure that your watchOS app has access to the most recent content available.

Customize your app for all Apple Watch screen sizes.

An object that provides information that is common to all interface objects in your watchOS app.

A class that provides the infrastructure for managing the interface in a watchOS app.

An object that encapsulates information about a button displayed in an alert or action sheet.

An object that defines a portion of an image that you want to call out separately to an assistive app.

Returns a Boolean value indicating whether VoiceOver is running.

Returns a Boolean value indicating whether reduced motion is enabled.

An interface element that displays static text.

A label that displays the current date or time.

A label that displays a countdown or count-up timer.

A button in the user interface of your watchOS app.

A button that you can use to trigger payments through Apple Pay.

An interface element that toggles between an On and Off state.

An interface element that lets users select a single floating-point value from a range of values.

A view that displays data from a HealthKit activity summary object.

An interface element that displays a noninteractive map for the location you specify.

A container for one or more interface objects.

An interface object that displays a visual separator within a group.

An object that creates and manages the contents of a single-column table interface.

An interface element that presents a scrolling list of items for the user to choose from.

Enable background audio in your app to provide a seamless playback experience.

Let users control the currently playing audio in your app.

An interface element that lets users control the audio volume from the watch or a paired iPhone.

An object that controls playback of a single audio item.

An object that controls playback of one or more audio items.

An object that manages the presentation state of an audio file while it is being played.

An object that stores a reference to an audio file and provides metadata information about that file.

An image that can be displayed in the interface of your watchOS app.

A wrapper for images you use with a picker interface.

A collection of methods you can use to control the playback of animated images.

An interface element that lets you play video and audio content in your watchOS app.

An interface element that displays a video's poster image and supports inline playing of the video.

An interface element that displays either a video stream or a single snapshot from an IP camera connected to HomeKit.

Constants indicating the appearance of video content.

An object that lets you manage a SpriteKit scene in your watchOS app.

An object that lets you manage SceneKit content for display in your app.

An object that reports the current state of the digital crown, including its rotational speed when it is in motion.

A collection of methods you can implement to track the user's interaction with the digital crown, receiving notifications when the user rotates the crown or when rotation stops.

The base class for all other gesture recognizer classes.

A gesture recognizer that looks for a touch event that occurs in the same relative area for an extended period of time.

A gesture recognizer that looks for a touch event that moves around the screen.

A gesture recognizer that looks for swiping gestures in one or more directions.

A gesture recognizer that looks for a touch event occurring and ending in approximately the same area on the screen.

Define a dynamic notification controller that responds to user interactions.

An interface controller object that manages a dynamic user interface for a local or remote notification.

The abstract superclass for WatchKit's other background task classes.

A background task used to update your app’s state in the background.

A background task that helps you respond to NSURLSession background transfers.

A background task used to receive background updates from the Watch Connectivity framework.

A background task used to update your app’s user interface in preparation for a snapshot.

A background task used to update your app after a SiriKit intent runs.

A background task used to periodically donate relevant Siri shortcuts.

Error codes reported by WatchKit.

The domain for WatchKit errors. This value is used in the NSError class.

The name of the class that implements the complication data source protocol.

The complication families for which the app can provide data.

A Boolean value indicating whether an audio app on Apple Watch automatically launches when its corresponding iOS app starts playing audio content.

A watchOS app's bundle ID.

The execution time for a WatchKit extension while running in the background.

The bundle identifier for the iOS app that's paired with a watchOS app.

The name of the class that's the delegate for the WKExtension object in a WatchKit extension.

A Boolean value indicating whether the bundle is the watchOS app that the user launches.