Instance Method

startDeviceMotionUpdates(using:to:withHandler:)

Starts device-motion updates on an operation queue and using a specified reference frame and block handler.

Declaration

func startDeviceMotionUpdates(using referenceFrame: CMAttitudeReferenceFrame, to queue: OperationQueue, withHandler handler: @escaping CMDeviceMotionHandler)

Parameters

referenceFrame

A constant identifying the reference frame to use for device-motion updates.

queue

An operation queue provided by the caller. Because the processed events might arrive at a high rate, using the main operation queue is not recommended.

handler

A block that is invoked with each update to handle new device-motion data. The block must conform to the CMDeviceMotionHandler type.

Discussion

You must call stopDeviceMotionUpdates() when you no longer want your app to process device-motion updates.

See Also

Managing Device Motion Updates

var showsDeviceMovementDisplay: Bool

Controls whether the device-movement display is shown.

var deviceMotionUpdateInterval: TimeInterval

The interval, in seconds, for providing device-motion updates to the block handler.

func startDeviceMotionUpdates(to: OperationQueue, withHandler: CMDeviceMotionHandler)

Starts device-motion updates on an operation queue and using a specified block handler.

func startDeviceMotionUpdates(using: CMAttitudeReferenceFrame)

Starts device-motion updates using a reference frame but without a block handler.

func startDeviceMotionUpdates()

Starts device-motion updates without a block handler.

func stopDeviceMotionUpdates()

Stops device-motion updates.

var deviceMotion: CMDeviceMotion?

The latest sample of device-motion data.

typealias CMDeviceMotionHandler

The type of block callback for handling device-motion data.