gistfile1.txt

//
//  ViewController.swift
//  5gMeter
//
//  Created by David Lopez Dayer on 5/17/20.
//  Copyright © 2020 David Lopez Dayer. All rights reserved.
//

import UIKit
import CoreMotion

class ViewController: UIViewController {
    
    @IBOutlet weak var xValue: UILabel!
    @IBOutlet weak var yValue: UILabel!
    @IBOutlet weak var zValue: UILabel!
    @IBOutlet weak var fieldValue: UILabel!
    
    let motionManager = CMMotionManager()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        self.motionManager.magnetometerUpdateInterval = 1
        self.motionManager.startMagnetometerUpdates(to: OperationQueue.main) {
            data, err in
            self.magnetometerData(data: data, err: err)
        }
        
    }
    
    func magnetometerData(data: CMMagnetometerData?, err: Error?) -> Swift.Void {
        if err != nil {
            return
        }
        
        let x = data!.magneticField.x
        let y = data!.magneticField.y
        let z = data!.magneticField.z
        
        xValue.text = String("\(data!.magneticField.x.rounded())")
        yValue.text = String("\(data!.magneticField.y.rounded())")
        zValue.text = String("\(data!.magneticField.z.rounded())")
        
        let field = sqrt(x*x + y*y + z*z)
        fieldValue.text = "\(field.rounded())"

        
    }
    
    
}