How to Assess Sensor Data on your iPhone with CoreMotion?

Developer iOS
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1 
import SwiftUI
import CoreMotion


class MotionManager: ObservableObject {
    private var motionManager = CMMotionManager()
    @Published var deviceMotionData: CMDeviceMotion?

    func startUpdates() {
        if motionManager.isDeviceMotionAvailable {
            motionManager.deviceMotionUpdateInterval = 0.1
            motionManager.startDeviceMotionUpdates(to: .main) { [weak self] (motion, error) in
                guard let motion = motion, error == nil else { return }
                self?.deviceMotionData = motion
            }
        }
    }

    func stopUpdates() {
        if motionManager.isDeviceMotionAvailable {
            motionManager.stopDeviceMotionUpdates()
        }
    }
}




struct ContentView: View {
    @ObservedObject private var motionManager = MotionManager()

    var body: some View {
        VStack {
            if let data = motionManager.deviceMotionData {
                Text("Attitude: (pitch: \(data.attitude.pitch), roll: \(data.attitude.roll), yaw: \(data.attitude.yaw))")
                Text("Rotation Rate: (x: \(data.rotationRate.x), y: \(data.rotationRate.y), z: \(data.rotationRate.z))")
                Text("Gravity: (x: \(data.gravity.x), y: \(data.gravity.y), z: \(data.gravity.z))")
                Text("User Acceleration: (x: \(data.userAcceleration.x), y: \(data.userAcceleration.y), z: \(data.userAcceleration.z))")
            } else {
                Text("Device motion data is not available.")
            }
        }
        .onAppear {
            motionManager.startUpdates()
        }
        .onDisappear {
            motionManager.stopUpdates()
        }
    }
}