A Combine-based CoreMotion data provider as a Swift Package.
On every update of the device motion data (accelerometer and gyroscope), it provides a struct
struct MotionData {
var timestamp : Date
var acc_x : Double // userAcceleration.x
var acc_y : Double // userAcceleration.y
var acc_z : Double // userAcceleration.z
var rot_x : Double // rotationRate.x
var rot_y : Double // rotationRate.y
var rot_z : Double // rotationRate.z
}through a PassthroughSubject<MotionData, Never> called motionWillChange, as well as a published property motion.
If real location data is unavailable on the device (e.g., the Simulator), it provides random fake-motion data scheduled by a timer.
Initialize and start the MotionProvider
let motionProvider = MotionProvider()
motionProvider.start()Subscribe to the motionWillChange subject and store the returned Cancellable
cancellableMotion = motionProvider.motionWillChange.sink { md in
handleMotion(md)
}The function handleMotion in the sink closure is executed on every MotionData object sent by the MotionProvider.
Also, the MotionProvider is an ObservableObject which has a published property motion that updates the ObservableObject.
This dynamic property can directly be accessed in SwiftUI.
Stop the MotionProvider and cancel the subscription
motionProvider.stop()
cancellableMotion?.cancel()