核心运动计步器保存到 Firebase

Posted 2023-03-15

【中文标题】核心运动计步器保存到 Firebase

【英文标题】：Core Motion Pedometer Save to Firebase

【发布时间】：2018-03-21 16:53:31

【问题描述】：

在此代码中是一个工作计步器，它显示移动速度和当前步数。我想知道如何将我的步骤保存到我的 firebase 数据库？我的 IBAction 按钮保存确实提交到了我的 firebase 数据库，但它提交了数字 0。如何提交 stepCountlabel 显示的数字？

import UIKit
import CoreMotion
import Dispatch
import Firebase

class PedometerViewController: UIViewController 

// Declarations of Pedometer
private let activityManager = CMMotionActivityManager()
private let pedometer = CMPedometer()
private var shouldStartUpdating: Bool = false
private var startDate: Date? = nil
var stepNumberVule: Int = 0 // FIREBASE CODE

// Storyboard connections
@IBOutlet weak var startButton: UIButton!
@IBOutlet weak var stepsCountLabel: UILabel!
@IBOutlet weak var activityTypeLabel: UILabel!

// FIREBASE CODE - I WANT TO WORK - ADD STEPS TO FIREBASE DATABASE
func getPedValue() 
    var ref: DatabaseReference!
    ref = Database.database().reference()
    let userID = Auth.auth().currentUser?.uid
    ref.child("user").child(userID!).observeSingleEvent(of: .value, with:  (snapshot) in
let value = snapshot.value as? NSDictionary
let ped:Int = value?["pedometer"] as? Int ?? 0
 self.stepNumberVule = ped
 self.stepsCountLabel.text = ("\(self.stepNumberVule)")
    )  (error) in
        print(error.localizedDescription)
    
    

@IBAction func Save(_ sender: Any) 
    var ref: DatabaseReference!
    ref = Database.database().reference()
    let user = Auth.auth().currentUser!.uid
    let key = ref.child("user").child(user)
    ref.child("user/\(user)/pedometer").setValue(self.stepNumberVule)


// END OF FIREBASE CODE


// Do any additional setup after loading the view.
override func viewDidLoad() 
    super.viewDidLoad()
    startButton.addTarget(self, action: #selector(didTapStartButton), for: .touchUpInside)

// Do additional tasks associated with presenting the view
    override func viewWillAppear(_ animated: Bool) 
    super.viewWillAppear(animated)
    guard let startDate = startDate else  return 
    updateStepsCountLabelUsing(startDate: startDate)

// Go! button tapped
    @objc private func didTapStartButton() 
    shouldStartUpdating = !shouldStartUpdating
    shouldStartUpdating ? (onStart()) : (onStop())



  // Pedometer Extension and its private fuctions (functions are       explained explicitly so no need for comments)
  extension PedometerViewController 
private func onStart() 
    startButton.setTitle("Stop", for: .normal)
    startDate = Date()
    checkAuthorizationStatus()
    startUpdating()


private func onStop() 
    startButton.setTitle("Start", for: .normal)
    startDate = nil
    stopUpdating()
 

private func startUpdating() 
    if CMMotionActivityManager.isActivityAvailable() 
        startTrackingActivityType()
     else 
        activityTypeLabel.text = "Not available"
 

    if CMPedometer.isStepCountingAvailable() 
        startCountingSteps()
     else 
        stepsCountLabel.text = "Not available"
    
 

private func checkAuthorizationStatus() 
    switch CMMotionActivityManager.authorizationStatus() 
    case CMAuthorizationStatus.denied:
        onStop()
        activityTypeLabel.text = "Not available"
        stepsCountLabel.text = "Not available"
    default:break
    
 

private func stopUpdating() 
    activityManager.stopActivityUpdates()
    pedometer.stopUpdates()
    pedometer.stopEventUpdates()
 

private func on(error: Error) 
    //handle error
 

// Update step count
private func updateStepsCountLabelUsing(startDate: Date) 
    pedometer.queryPedometerData(from: startDate, to: Date()) 
        [weak self] pedometerData, error in
        if let error = error 
            self?.on(error: error)
         else if let pedometerData = pedometerData 
            DispatchQueue.main.async 
                self?.stepsCountLabel.text = String(describing: pedometerData.numberOfSteps)
            
        
    
  
// Activity type
private func startTrackingActivityType() 
    activityManager.startActivityUpdates(to: OperationQueue.main) 
        [weak self] (activity: CMMotionActivity?) in
        guard let activity = activity else  return 
        DispatchQueue.main.async 
            if activity.walking 
                self?.activityTypeLabel.text = "You're walking, go faster!"
             else if activity.stationary 
                self?.activityTypeLabel.text = "You're still, stop being lazy"
             else if activity.running 
                self?.activityTypeLabel.text = "You're running, nice one!"
             else if activity.automotive 
                self?.activityTypeLabel.text = "Driving doesnt count..."
            
        
    

// Start counting steps
private func startCountingSteps() 
    pedometer.startUpdates(from: Date()) 
        [weak self] pedometerData, error in
        guard let pedometerData = pedometerData, error == nil else  return 

        DispatchQueue.main.async 
            self?.stepsCountLabel.text = pedometerData.numberOfSteps.stringValue
        
    

【参考方案1】：

所以你有全局变量 stepNumberVule 并且每次调用 Save 操作时，你都会将此变量的值保存到 Firebase，但这里的问题是你没有更新这个值updateStepsCountLabelUsing(startDate: Date) 或 startCountingSteps()。如果您想保存确切的步数，您应该从计步器数据中更新stepNumberVule。

例如：

创建函数

private func updateStepCounterValue(_ numberOfSteps: NSNumber) 
    stepNumberVule = numberOfSteps.intValue
    stepsCountLabel.text = numberOfSteps.stringValue

然后，调用它来更新你的标签和变量：

// Start counting steps
private func startCountingSteps() 
    pedometer.startUpdates(from: Date()) 
        [weak self] pedometerData, error in

        guard let pedometerData = pedometerData, error == nil else  return 
        DispatchQueue.main.async 
             self?.updateStepCounterValue(pedometerData.numberOfSteps)
        
    

和

private func updateStepsCountLabelUsing(startDate: Date) 
    pedometer.queryPedometerData(from: startDate, to: Date()) 
        [weak self] pedometerData, error in

        if let error = error 
            self?.on(error: error)
         else if let pedometerData = pedometerData 
            DispatchQueue.main.async 
                self?.updateStepCounterValue(pedometerData.numberOfSteps)
            
        
    

这样，您的stepNumberVule 将始终与计步器中的当前数据保持同步。

【讨论】：

太棒了！非常感谢