Kazuhiro Kamakura 1SJPSJUJ[JOH)FBMUI %FWFMPQJOHB1FSTPOBMJ[FE"QQ ݈߁ୈҰʂ ࣗ෼ઐ༻ͷݸਓΞϓϦ։ൃ

Kazuhiro Kamakura ח૔࿨߂ 9!ZPZPLL55 LY Corporation

Do you do personal development? ࠷ۙɺݸਓ։ൃ͍ͯ͠·͔͢ʂʁ

Some people might say “I haven't done any personal development lately.” Ҏલ͸͍͚ͯͨ͠Ͳɺ࠷ۙ͸͍ͯ͠ͳ͍ɾɾ

I want only one function. However, that would likely result in rejection from the App Review. ̍ͭͷػೳ͚ͩཉ͍͚͠ͲɺͦΕͰ͸ϦδΣΫτ͞Εͦ͏ɾɾ

I have a suggestion! 💡

Why don't you develop your own app only for yourself? ࣗ෼ͷͨΊ͚ͩͷΞϓϦ։ൃ͸Ͳ͏Ͱ͠ΐ͏ʂʁ

I have created an app that only counts my steps. 🏃. →

Background ࡞ͬͨഎܠ • I know we need to walk for our health. • But I rarely go out. 🏃..

I have an incentive Πϯηڅ༩ͷࢧڅʂ I can receive an incentive from my company if I walk over 4,000 steps a day! https://about.yahoo.co.jp/info/blog/20210719/walking.html ※2021೥౰࣌

I have an incentive Πϯηڅ༩ͷࢧڅʂ I can receive an incentive from my company if I walk over 4,000 steps a day! https://about.yahoo.co.jp/info/blog/20210719/walking.html I'm gonna do it! ※2021೥౰࣌

So, how did I make it?ɹ 🔨☺ Ͱ͸ͲͷΑ͏ʹ࡞͍͔ͬͯͬͨʁ

How the app measures the number of steps There are two patterns 1. CMPedometer of CoreMotion 2. HealthKit I won't use it this time ->

CMPedometer of CoreMotion 1. It can measure in real time 2. It can measure the number of steps on that device. 3. It can count steps from iOS 8.

How to use CMPedometer of CoreMotion import CoreMotion class PedometerManager { let pedometer = CMPedometer() // ϖυϝʔλʔ͕ར༻Մೳ͔νΣοΫ func isPedometerAvailable() -> Bool { return CMPedometer.isStepCountingAvailable() } // ϦΞϧλΠϜͰา਺Λऔಘ func startPedometerUpdates() { guard CMPedometer.isStepCountingAvailable() else { print("Step counting is not available.") return } pedometer.startUpdates(from: Date()) { (data, error) in guard error == nil else { print("There was an error starting pedometer updates: \(error!.localizedDescription)") return } if let pedometerData = data { print("Steps taken: \(pedometerData.numberOfSteps)") // ଞͷσʔλ΋ಉ༷ʹΞΫηεՄೳ } } } }

I can write the program with ChatGPT $IBU(15ʹฉ͚͹؆୯ʹ͔͚·͢ʂ Thank you!

HealthKit As you know, we can get information from HealthKit ← 📱 Same as this ->

Which one should I use? 🤔 Ͱ͸ͲͪΒΛબͿ͔ʁ

HealthKit method is popular. And, it’s used for the company’s app. So, I use Health Kit.

We can do a lot more🚶

How to use HealthKit • Add Capability • Add permission settings for HealthKit data access to info.plist

How to use import HealthKit class HealthKitManager { let healthStore = HKHealthStore() // HealthKitͷηοτΞοϓ init() { if HKHealthStore.isHealthDataAvailable() { let allTypes = Set([HKObjectType.quantityType(forIdentifier: .stepCount)!]) healthStore.requestAuthorization(toShare: nil, read: allTypes) { (success, error) in if !success { // ΤϥʔϋϯυϦϯά } } } } // ಛఆͷ೔ͷา਺Λऔಘ func getSteps(forDate date: Date, completion: @escaping (Double) -> Void) { guard let stepCountType = HKQuantityType.quantityType(forIdentifier: .stepCount) else { completion(0) return } let startOfDay = Calendar.current.startOfDay(for: date) let endOfDay = Calendar.current.date(byAdding: .day, value: 1, to: startOfDay) let predicate = HKQuery.predicateForSamples(withStart: startOfDay, end: endOfDay, options: .strictStartDate) let query = HKStatisticsQuery(quantityType: stepCountType, quantitySamplePredicate: predicate, options: .cumulativeSum) { (query, statistics, error) in var steps: Double = 0 if error != nil { // ΤϥʔϋϯυϦϯά } else if let quantity = statistics?.sumQuantity() { steps = quantity.doubleValue(for: HKUnit.count()) } DispatchQueue.main.async { completion(steps) } } healthStore.execute(query) } }

Completion of the iOS version This is what it looks like when displayed in Swift Charts →

My App Icon ->

But, I didn’t open the iOS app ❌ ͔͠͠ɺiOS App͸։͔ͣɾɾɾ

So, I created a Watch widget that I can always see.

But Xcode 14 doesn’t have HealthKit capability • Watch’s Widget of Xcode 14 doesn’t have HealthKit capability. • Therefore, I need to transfer data from my watch or iPhone. ← Nothing…

Xcode 15 has the capability🎉 Xcode 15 gets HealthKit capability!!

I can get the same method as iOS! ΍Γํ͸iOSͱಉ͡ʂ // HealthStoreʹࠓ೔ͷา਺Λऔಘ͢ΔϝιουΛ௥Ճ extension HealthStore { func fetchTodaysSteps(completion: @escaping (Int) -> Void) { // HealthKitετΞ͕͋Δ͜ͱΛ֬ೝ guard let healthStore = healthStore else { return } // า਺λΠϓΛఆٛ͠ɺࠓ೔ͷ೔෇ൣғΛઃఆ let stepType = HKQuantityType.quantityType(forIdentifier: .stepCount)! let now = Date() let startOfDay = Calendar.current.startOfDay(for: now) // ΫΤϦͷ೔෇ൣғΛઃఆ͢ΔͨΊͷड़ޠΛ࢖༻ let predicate = HKQuery.predicateForSamples(withStart: startOfDay, end: now, options: .strictStartDate) // า਺ͷ߹ܭΛऔಘ͢ΔͨΊͷΫΤϦΛ࡞੒ let query = HKStatisticsQuery(quantityType: stepType, quantitySamplePredicate: predicate, options: .cumulativeSum) { _, statistics, _ in let steps = statistics?.sumQuantity()?.doubleValue(for: HKUnit.count()) ?? 0 completion(Int(steps)) } // ΫΤϦΛ࣮ߦ healthStore.execute(query) } }

Reload & Display 3FMPBE struct NumberStepsWatchExtensionEntryView : View { var entry: Provider.Entry var body: some View { VStack { Text(String(Date().timetoString())) .font(.footnote) Text(String(entry.steps)) } .containerBackground(for: .widget) { Color.white } } } func getTimeline(in context: Context, completion: @escaping (Timeline) -> ()) { let healthStore = HealthStore() healthStore.fetchTodaysSteps { stepCount in let currentDate = Date() let entries = [ StepEntry(date: currentDate, steps: stepCount) ] // ࣍ͷߋ৽࣌ࠁΛݱࡏ͔Β5෼ޙʹઃఆ let nextUpdateDate = Calendar.current.date(byAdding: .minute, value: 5, to: currentDate)! let timeline = Timeline(entries: entries, policy: .after(nextUpdateDate)) completion(timeline) } } %JTQMBZ

I can see it on the main screen now! I can always see it on my Apple Watch!

As a result I can always walk over 4,000 steps a day 🎉 ← 4000 Steps

Conclusion • It is di ffi cult to achieve exercise with the goal of health alone. • I enjoy solving my own problems with programming. • Especially for watchOS, there are still very few in the world.

Enjoy Programming!

Thank you!