万歩計の歩数の取得

info.plistにNSMotionUsageDescriptionを追加します。

Swift 5.x/4.x

//
//  ViewController.swift
//  coremotion003
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//

import UIKit
import CoreMotion

class ViewController: UIViewController {

    var myPedometer: CMPedometer!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Labelを作成.
        let myStepLabel: UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 150))
        myStepLabel.backgroundColor = UIColor.orange
        myStepLabel.layer.masksToBounds = true
        myStepLabel.layer.cornerRadius = 75.0
        myStepLabel.textColor = UIColor.white
        myStepLabel.shadowColor = UIColor.gray
        myStepLabel.font = UIFont.systemFont(ofSize: 30)
        myStepLabel.textAlignment = NSTextAlignment.center
        myStepLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: 300)

        // Viewの背景色を青にする.
        self.view.backgroundColor = UIColor.cyan

        // Viewに追加.
        self.view.addSubview(myStepLabel)

        // 歩数計を生成.
        myPedometer = CMPedometer()

        // ペドメーター(歩数計)で計測開始.
        myPedometer.startUpdates(from: NSDate() as Date, withHandler: { (pedometerData, error) in
            if let e = error {
                print(e.localizedDescription)
                return
            }
            guard let data = pedometerData else {
                return
            }
            let myStep = data.numberOfSteps
            DispatchQueue.main.async {
                myStepLabel.text = "\(myStep) 歩"
            }
        })
    }

}

Swift 3.x

//
//  ViewController.swift
//  coremotion003
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//

import UIKit
import CoreMotion

class ViewController: UIViewController {

    var myPedometer: CMPedometer!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Labelを作成.
        let myStepLabel: UILabel = UILabel(frame: CGRect(x: 0, y: 0, width: 150, height: 150))
        myStepLabel.backgroundColor = UIColor.orange
        myStepLabel.layer.masksToBounds = true
        myStepLabel.layer.cornerRadius = 75.0
        myStepLabel.textColor = UIColor.white
        myStepLabel.shadowColor = UIColor.gray
        myStepLabel.font = UIFont.systemFont(ofSize: 30)
        myStepLabel.textAlignment = NSTextAlignment.center
        myStepLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: 300)

        // Viewの背景色を青にする.
        self.view.backgroundColor = UIColor.cyan

        // Viewに追加.
        self.view.addSubview(myStepLabel)

        // 歩数計を生成.
        myPedometer = CMPedometer()

        // ペドメーター(歩数計)で計測開始.
        myPedometer.startUpdates(from: NSDate() as Date, withHandler: { (pedometerData, error) in
            if let e = error {
                print(e.localizedDescription)
                return
            }
            guard let data = pedometerData else {
                return
            }
            let myStep = data.numberOfSteps
            myStepLabel.text = "\(myStep) 歩"
        })
    }

}

Swift 2.3

//
//  ViewController.swift
//  coremotion003
//
//  Copyright © 2016年 FaBo, Inc. All rights reserved.
//

import UIKit
import CoreMotion

class ViewController: UIViewController {

    var myPedometer: CMPedometer!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Labelを作成.
        let myStepLabel: UILabel = UILabel(frame: CGRectMake(0,0,150,150))
        myStepLabel.backgroundColor = UIColor.orangeColor()
        myStepLabel.layer.masksToBounds = true
        myStepLabel.layer.cornerRadius = 75.0
        myStepLabel.textColor = UIColor.whiteColor()
        myStepLabel.shadowColor = UIColor.grayColor()
        myStepLabel.font = UIFont.systemFontOfSize(CGFloat(30))
        myStepLabel.textAlignment = NSTextAlignment.Center
        myStepLabel.layer.position = CGPoint(x: self.view.bounds.width/2,y: 300)

        // Viewの背景色を青にする.
        self.view.backgroundColor = UIColor.cyanColor()

        // Viewに追加.
        self.view.addSubview(myStepLabel)

        // 歩数計を生成.
        myPedometer = CMPedometer()

        // ペドメーター(歩数計)で計測開始.
        myPedometer.startPedometerUpdatesFromDate(NSDate(), withHandler: { (pedometerData, error) in
            if let e = error {
                print(e.localizedDescription)
                return
            }
            guard let data = pedometerData else {
                return
            }
            let myStep = data.numberOfSteps
            myStepLabel.text = "\(myStep) 歩"
        })
    }

}

3.xと4.xの差分

• myStepLabel.text = "\(myStep) 歩" を DispatchQueue.main.async {} で囲む

2.3と3.0の差分

• UIColorによる色指定の簡略化
  • 例 : UIColor.blueColor()からUIColor.blue
• CGRectMake(CGFloat, CGFloat, CGFloat, CGFloat)からCGRect(x: CGFloat, y: CGFloat, width: CGFloat, height: CGFloat)に変更
• UIFont.systemFontOfSize(CGFloat)からUIFont.systemFont(ofSize fontSize: CGFloat)に変更
• NSTextAlignment.CenterからNSTextAlignment.centerに変更
• CMPedometer.startPedometerUpdatesFromDate(NSDate, withHandler: CMPedometerHandler)からCMPedometer.startUpdates(from: Date, withHandler: CMPedometerHandler)に変更

Reference

• CMPedometer
  • https://developer.apple.com/library/ios/documentation/CoreMotion/Reference/CMPedometer_class/
• NSTextAlignment
  • https://developer.apple.com/reference/uikit/nstextalignment
• UIFont
  • https://developer.apple.com/reference/uikit/uifont