CMMotionManager

CMMotionManagerSetup.swift

import SwiftUI
import CoreMotion

struct CMMotionManagerTest: View {
    
    @StateObject var motion = MotionManager()
    
    var body: some View {
        ZStack {
            Color.purple
            Image(systemName: "safari.fill")
                .resizable()
                .foregroundColor(Color.pink)
                .frame(width: 50, height: 50)
                .rotationEffect(-Angle(degrees: motion.fx*100), anchor: .center)
        }
        .edgesIgnoringSafeArea(.all)
    }
}

struct CMMotionManagerTest_Previews: PreviewProvider {
    static var previews: some View {
        CMMotionManagerTest()
    }
}

class MotionManager: ObservableObject {
    
    private let motionManager = CMMotionManager()
    
    var fx: CGFloat = 0
    var fy: CGFloat = 0
    var fz: CGFloat = 0
    
    var dx: Double = 0
    var dy: Double = 0
    var dz: Double = 0
    
    @Published var isAnimating = false
    
    init() {
        motionManager.startDeviceMotionUpdates(to: .main) { data, error in
            guard let newData = data?.gravity else { return }
            
            self.dx = newData.x
            self.dy = newData.y
            self.dz = newData.z
            
            self.fx = CGFloat((newData.x))
            self.fy = CGFloat((newData.y))
            self.fz = CGFloat((newData.z))
            
            print("""
                  X: \(String(format: "%.2f", self.fx)),
                  Y: \(String(format: "%.2f", self.fy)),
                  Z: \(String(format: "%.2f", self.fz)),
                  """)
            
            self.isAnimating.toggle()
            self.objectWillChange.send()
        }
    }
    
    // Used to stop motion manager if needed.
    func shutdown() {
        motionManager.stopDeviceMotionUpdates()
    }
}