workoutbuilder and workoutbuilderDidCollectEvent are never called - swift

Question

I went by tutorial for creating workout session but these two functions never get called.
This is all in watch part of the application
let healthStore = HKHealthStore()
var configuration: HKWorkoutConfiguration!
var session: HKWorkoutSession!
var builder: HKLiveWorkoutBuilder!
override func awake(withContext context: Any?) {
super.awake(withContext: context)
let typesToShare: Set = [
HKQuantityType.workoutType()
]
// The quantity types to read from the health store.
let typesToRead: Set = [
HKQuantityType.quantityType(forIdentifier: .heartRate)!,
HKQuantityType.quantityType(forIdentifier: .activeEnergyBurned)!,
HKQuantityType.quantityType(forIdentifier: .distanceWalkingRunning)!
]
// Request authorization for those quantity types.
healthStore.requestAuthorization(toShare: typesToShare, read: typesToRead) { (success, error) in
// Handle errors here.
}
configuration = HKWorkoutConfiguration()
configuration.activityType = .running
configuration.locationType = .outdoor
do {
session = try HKWorkoutSession(healthStore: healthStore, configuration: configuration)
builder = session.associatedWorkoutBuilder()
} catch {
dismiss()
return
}
builder.dataSource = HKLiveWorkoutDataSource(healthStore: healthStore,
workoutConfiguration: configuration)
session.startActivity(with: Date())
builder.beginCollection(withStart: Date()) { (success, error) in
}
}
func workoutBuilder(_ workoutBuilder: HKLiveWorkoutBuilder, didCollectDataOf collectedTypes: Set<HKSampleType>) {
for type in collectedTypes {
guard let quantityType = type as? HKQuantityType else {
return // Nothing to do.
}
// Calculate statistics for the type.
let statistics = workoutBuilder.statistics(for: quantityType)
//let label = labelForQuantityType(quantityType)
DispatchQueue.main.async() {
// Update the user interface.
let heartRateUnit = HKUnit.count().unitDivided(by: HKUnit.minute())
let value = statistics?.mostRecentQuantity()?.doubleValue(for: heartRateUnit)
let roundedValue = Double( round( 1 * value! ) / 1 )
print("\(roundedValue) BPM")
}
}
}
func workoutBuilderDidCollectEvent(_ workoutBuilder: HKLiveWorkoutBuilder) {
let lastEvent = workoutBuilder.workoutEvents.last
DispatchQueue.main.async() {
// Update the user interface here.
print(lastEvent)
}
}
Nothing gets ever printed, and no breakpoint inside those two functions is ever hit.
What am I missing?
It seems like the session is running since there is this small icon of human running when i minimalize the app

Answer 1

You did not connect the delegates.
builder.delegate = self
Your methods will never be called if swift does not know that you are using your interface controller as a delegate for the builder.