A full set of all HKObjectTypes (excluding correlation types, as of Apr. 15, 2017) because typing this out was a pain in the ass.

hktypes.swift

let hkTypes:Set<HKObjectType> = [
    // body measurements
    HKObjectType.quantityType(forIdentifier: .bodyMassIndex)!,
    HKObjectType.quantityType(forIdentifier: .bodyFatPercentage)!,
    HKObjectType.quantityType(forIdentifier: .height)!,
    HKObjectType.quantityType(forIdentifier: .bodyMass)!,
    HKObjectType.quantityType(forIdentifier: .leanBodyMass)!,
    // fitness identifiers
    HKObjectType.quantityType(forIdentifier: .stepCount)!,
    HKObjectType.quantityType(forIdentifier: .distanceWalkingRunning)!,
    HKObjectType.quantityType(forIdentifier: .distanceCycling)!,
    HKObjectType.quantityType(forIdentifier: .distanceWheelchair)!,
    HKObjectType.quantityType(forIdentifier: .basalEnergyBurned)!,
    HKObjectType.quantityType(forIdentifier: .activeEnergyBurned)!,
    HKObjectType.quantityType(forIdentifier: .activeEnergyBurned)!,
    HKObjectType.quantityType(forIdentifier: .flightsClimbed)!,
    HKObjectType.quantityType(forIdentifier: .nikeFuel)!,
    HKObjectType.quantityType(forIdentifier: .appleExerciseTime)!,
    HKObjectType.quantityType(forIdentifier: .pushCount)!,
    // vital signs identifiers
    HKObjectType.quantityType(forIdentifier: .heartRate)!,
    HKObjectType.quantityType(forIdentifier: .bodyTemperature)!,
    HKObjectType.quantityType(forIdentifier: .basalBodyTemperature)!,
    HKObjectType.quantityType(forIdentifier: .bloodPressureSystolic)!,
    HKObjectType.quantityType(forIdentifier: .bloodPressureDiastolic)!,
    HKObjectType.quantityType(forIdentifier: .respiratoryRate)!,
    // results identifiers
    HKObjectType.quantityType(forIdentifier: .oxygenSaturation)!,
    HKObjectType.quantityType(forIdentifier: .peripheralPerfusionIndex)!,
    HKObjectType.quantityType(forIdentifier: .bloodGlucose)!,
    HKObjectType.quantityType(forIdentifier: .numberOfTimesFallen)!,
    HKObjectType.quantityType(forIdentifier: .electrodermalActivity)!,
    HKObjectType.quantityType(forIdentifier: .inhalerUsage)!,
    HKObjectType.quantityType(forIdentifier: .bloodAlcoholContent)!,
    HKObjectType.quantityType(forIdentifier: .forcedVitalCapacity)!,
    HKObjectType.quantityType(forIdentifier: .forcedExpiratoryVolume1)!,
    HKObjectType.quantityType(forIdentifier: .peakExpiratoryFlowRate)!,
    // nutrition identifiers
    HKObjectType.quantityType(forIdentifier: .dietaryBiotin)!,
    HKObjectType.quantityType(forIdentifier: .dietaryCaffeine)!,
    HKObjectType.quantityType(forIdentifier: .dietaryCalcium)!,
    HKObjectType.quantityType(forIdentifier: .dietaryCarbohydrates)!,
    HKObjectType.quantityType(forIdentifier: .dietaryChloride)!,
    HKObjectType.quantityType(forIdentifier: .dietaryCholesterol)!,
    HKObjectType.quantityType(forIdentifier: .dietaryChromium)!,
    HKObjectType.quantityType(forIdentifier: .dietaryCopper)!,
    HKObjectType.quantityType(forIdentifier: .dietaryEnergyConsumed)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFatMonounsaturated)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFatPolyunsaturated)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFatSaturated)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFatTotal)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFiber)!,
    HKObjectType.quantityType(forIdentifier: .dietaryFolate)!,
    HKObjectType.quantityType(forIdentifier: .dietaryIodine)!,
    HKObjectType.quantityType(forIdentifier: .dietaryIron)!,
    HKObjectType.quantityType(forIdentifier: .dietaryMagnesium)!,
    HKObjectType.quantityType(forIdentifier: .dietaryManganese)!,
    HKObjectType.quantityType(forIdentifier: .dietaryMolybdenum)!,
    HKObjectType.quantityType(forIdentifier: .dietaryNiacin)!,
    HKObjectType.quantityType(forIdentifier: .dietaryPantothenicAcid)!,
    HKObjectType.quantityType(forIdentifier: .dietaryPhosphorus)!,
    HKObjectType.quantityType(forIdentifier: .dietaryPotassium)!,
    HKObjectType.quantityType(forIdentifier: .dietaryProtein)!,
    HKObjectType.quantityType(forIdentifier: .dietaryRiboflavin)!,
    HKObjectType.quantityType(forIdentifier: .dietarySelenium)!,
    HKObjectType.quantityType(forIdentifier: .dietarySodium)!,
    HKObjectType.quantityType(forIdentifier: .dietarySugar)!,
    HKObjectType.quantityType(forIdentifier: .dietaryThiamin)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminA)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminB12)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminB6)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminC)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminD)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminE)!,
    HKObjectType.quantityType(forIdentifier: .dietaryVitaminK)!,
    HKObjectType.quantityType(forIdentifier: .dietaryWater)!,
    HKObjectType.quantityType(forIdentifier: .dietaryZinc)!,
    // UV exposure identifiers
    HKObjectType.quantityType(forIdentifier: .uvExposure)!,
    // Category type identifiers
    HKObjectType.categoryType(forIdentifier: .sleepAnalysis)!,
    HKObjectType.categoryType(forIdentifier: .appleStandHour)!,
    HKObjectType.categoryType(forIdentifier: .cervicalMucusQuality)!,
    HKObjectType.categoryType(forIdentifier: .ovulationTestResult)!,
    HKObjectType.categoryType(forIdentifier: .menstrualFlow)!,
    HKObjectType.categoryType(forIdentifier: .intermenstrualBleeding)!,
    HKObjectType.categoryType(forIdentifier: .sexualActivity)!,
    HKObjectType.categoryType(forIdentifier: .mindfulSession)!,
    // Workout type identifiers
    HKObjectType.workoutType(),
]