An object that provides information about the user’s Apple Watch.
SDKs
Framework
You can use the information from WKInterface to make decisions about the content you display in your app. You can also use this object to play haptic feedback when your app is active.
Do not subclass or create instances of this class yourself. Always call the current class method to get the shared device object.
+ currentReturns the shared device object.
screenThe bounding rectangle of the screen.
screenThe number of pixels per point for the current screen.
nameThe name assigned to the underlying device.
modelThe model information for the device.
localizedThe localized version of the model information.
wristThe wrist on which the user wears the Apple Watch.
WKInterfaceConstants indicating the wrist on which the user wears the Apple Watch.
crownThe side on which the crown is positioned.
WKInterfaceConstants indicating the crown orientation from the user’s perspective.
preferredThe preferred font-sizing option.
systemThe name of the operating system.
systemThe version of the operating system.
layoutThe layout direction of the user interface.
+ interfaceReturns the user interface direction for the given semantic content attribute.
WKInterfaceA semantic description of the view’s contents, used to determine whether the view should be flipped when switching between left-to-right and right-to-left layouts.
WKInterfaceSpecifies the directional flow of the user interface.
batteryA Boolean value that determines whether the app can monitor the device's battery.
batteryThe battery's current percent charge.
batteryThe device's battery state.
WKInterfaceThe battery's charging state.
waterThe Apple Watch water-resistance rating.
WKWaterThe Apple Watch water-resistance rating.
- playGives haptic feedback to the user.
WKHapticConstant indicating the style of feedback to deliver using haptics.
cachedA dictionary containing the name and size (in bytes) of the cached images.
- addCaches the image using the provided name.
- addCaches the image data using the provided name.
- removeRemoves all the cached images from the cached dictionary.
- removeRemoves the cached image with the specified name.
WKExtensionAn object that manages behaviors that are shared among all of your app’s interface controllers.
WKExtensionA collection of methods you can implement to manage the app-level behavior of your WatchKit extension.
Ensure that your watchOS app has access to the most recent content available.