How to make workout app for watch os 2
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This document provides guidance on creating a workout tracking app for the Apple Watch using HealthKit. It outlines how to use the HealthKit framework to access fitness data, start and stop workout sessions, save workout data, and handle common issues like debugging on device and infrequent data updates. The main steps are initializing HealthKit, requesting authorization, querying for data during workout sessions, and saving workout objects on completion. Challenges discussed include debugging directly on the Apple Watch, keeping the app in the foreground during workouts, and managing battery usage.
![WatchKit Extension
let healthStore = HKHealthStore()
if HKHealthStore.isHealthDataAvailable() {
let energy = HKQuantityTypeIdentifierActiveEnergyBurned)!
let walkingRunning = HKQuantityTypeIdentifierDistanceWalkingRunning)!
let heartRate = HKQuantityTypeIdentifierHeartRate)!
let cycling = HKQuantityTypeIdentifierDistanceCycling)!
let typesToShare = Set([HKWorkoutType.workoutType()])
let typesToRead = Set([
HKObjectType.quantityTypeForIdentifier(energy,
HKObjectType.quantityTypeForIdentifier(walkingRunning,
HKObjectType.quantityTypeForIdentifier(heartRate,
HKObjectType.quantityTypeForIdentifier(cycling
])
healthStore.requestAuthorizationToShareTypes(typesToShare,
readTypes: typesToRead,
completion: { (result: Bool, error: NSError?) -> Void in
})
}](https://image.slidesharecdn.com/howtomakeworkoutappforwatchos2-150619095734-lva1-app6891/85/How-to-make-workout-app-for-watch-os-2-19-320.jpg)
How to make workout app for watch os 2
- 1. Howto make workoutapp for watchOS 2 Mercari Inc. @kitasuke
- 8. HealthKit
- 9. “Apps can useto share healthand fitness data” HealthKit Framework Reference
- 10. Sample Objects » Characteristics » Samples » Category Samples » Quantity Samples » Correlations » Workouts
- 11. Main flowforworkoutapps » Start workout session » Query data in HealthKit » Stop workout session » Save data in HealthKit
- 12. What'sWorkoutSession » Workout sessions allow apps to run in the foreground » Apple Watch can only run one workout session at a time
- 13. WorkoutSession class HKWorkoutSession: NSObject { var activityType: HKWorkoutActivityType { get } var locationType: HKWorkoutSessionLocationType { get } weak var delegate: HKWorkoutSessionDelegate? var state: HKWorkoutSessionState { get } init(activityType: HKWorkoutActivityType, locationType: HKWorkoutSessionLocationType) }
- 14. WorkoutActivityType enum HKWorkoutActivityType : UInt { case Basketball case Fishing case Gymnastics case Hunting case MartialArts case Running case Soccer case Swimming case Walking case Yoga … case Other }
- 15. WorkoutLocationType enum HKWorkoutSessionLocationType : Int { case Unknown case Indoor case Outdoor }
- 16. WorkoutSession delegate protocol HKWorkoutSessionDelegate : NSObjectProtocol { func workoutSession(workoutSession: HKWorkoutSession, didChangeToState toState: HKWorkoutSessionState, fromState: HKWorkoutSessionState, date: NSDate) func workoutSession(workoutSession: HKWorkoutSession, didFailWithError error: NSError) }
- 17. Startingand StoppingWorkout Sessions healthStore.startWorkoutSession(workoutSession) { (result: Bool, error: NSError?) -> Void in } healthStore.stopWorkoutSession(workoutSession) { (result: Bool, error: NSError?) -> Void in }
- 18. Setupfor HealthKit 1.Enable capabilities in Xcode 2.Check availability 3.Instantiate an HKHealthStore object 4.Request authorization
- 19. WatchKit Extension let healthStore = HKHealthStore() if HKHealthStore.isHealthDataAvailable() { let energy = HKQuantityTypeIdentifierActiveEnergyBurned)! let walkingRunning = HKQuantityTypeIdentifierDistanceWalkingRunning)! let heartRate = HKQuantityTypeIdentifierHeartRate)! let cycling = HKQuantityTypeIdentifierDistanceCycling)! let typesToShare = Set([HKWorkoutType.workoutType()]) let typesToRead = Set([ HKObjectType.quantityTypeForIdentifier(energy, HKObjectType.quantityTypeForIdentifier(walkingRunning, HKObjectType.quantityTypeForIdentifier(heartRate, HKObjectType.quantityTypeForIdentifier(cycling ]) healthStore.requestAuthorizationToShareTypes(typesToShare, readTypes: typesToRead, completion: { (result: Bool, error: NSError?) -> Void in }) }
- 20. Containing iOS app func applicationShouldRequestHealthAuthorization(application: UIApplication) { HKHealthStore().handleAuthorizationForExtensionWithCompletion { (result: Bool, error: NSError?) -> Void in } }
- 23. Accessing HealthKitData » Direct method calls » Sample query » Observer query » Anchored object query » Statistics query » Statistics collection query » Correlation query » Source query
- 24. Streaming Updates let predicate = HKQuery.predicateForSamplesWithStartDate(startDate, endDate: nil, options: .None) let type = HKObjectType.quantityTypeForIdentifier(HKQuantityTypeIdentifierDistanceCycling)! let distanceQuery = HKAnchoredObjectQuery(type: type, predicate: predicate, anchor: 0, limit: 0) { (query, samples, deletedObjects, anchor, error) -> Void in } distanceQuery.updateHandler = { (query, samples, deletedObjects, anchor, error) -> Void in } healthStore.executeQuery(distanceQuery)
- 25. Savingworkout let workout = HKWorkout(activityType: activityType, startDate: startDate, endDate: endDate, duration: endDate.timeIntervalSinceDate(startDate), totalEnergyBurned: totalEnergyBurned, totalDistance: totalDistance, metadata: nil) healthStore.saveObject(workout) { (result: Bool, error: NSError?) -> Void in }
- 26. Howto Debug Better debug on device, not simulator Because - Setting location to City Run or City Bicycle Ride doesn't work for HealthKit - Need to save data in HealthKit manually - Big behavior differences between device and simulator
- 27. Known Issues?
- 28. Can notattachto process on device “Did the 'trust this computer' diaglog ever show on the watch? Unpairing and then re-pairing and restarting Xcode should have gotten you that prompt. The symptoms you are experiencing seem to indicate that this dialog was not presented after you upgraded.” On device watchOS debugging impossible
- 29. WorkoutSession doesn'tkeepin the foreground Might be a bug? HKWorkoutSession and keeping the app in the foreground Having a workout count toward green exercise ring
- 30. InfrequentUpdates updateHandler is not stable? HKWorkoutSession with HKAnchoredObjectQuery has very infrequent updates
- 31. Batteryuse Not particularly workout app issue, but should be well-considered Battery Use Worse
- 32. Summary » Can access to a bunch of fitness information » Customizable for specific use » So much pain to debug
- 33. Thankyou