Swift - HealthKit will not authenticate - swift

Question

I am trying to make a basic script that will pull my daily steps from HealthKit on iOS, however when the page is triggered - nothing happens. It should request permission to read HealthKit data and I can't work out where I'm going wrong.
Here's my code:
import Foundation
import UIKit
import HealthKit
class HealthKitPage: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
class HealthKitManager {
let HealthStore = HKHealthStore()
func AuthoriseHealthKit() -> Bool {
var isEnabled = true
if HKHealthStore.isHealthDataAvailable() {
let StepCount = NSSet(object: HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount))
let DataTypesToWrite = NSSet(object: StepCount)
let DataTypesToRead = NSSet(object: StepCount)
HealthStore.requestAuthorization(toShare: nil, read: (StepCount as! Set<HKObjectType>)) {
(success, error) -> Void in
isEnabled = success
}
}else{
isEnabled = false
}
return isEnabled
}
}
Can anyone offer any suggestions?

Answer 1

I was able to resolve this using Himali's answer, but it needed converting to Swift 3, here's my working file:
import Foundation
import UIKit
import HealthKit
import UIKit
import HealthKit
class HealthKitPage : UIViewController
{
let healthStore: HKHealthStore = HKHealthStore()
override func viewDidLoad()
{
var shareTypes = Set<HKSampleType>()
shareTypes.insert(HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)!)
var readTypes = Set<HKObjectType>()
readTypes.insert(HKQuantityType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)!)
healthStore.requestAuthorization(toShare: shareTypes, read: readTypes) { (success, error) -> Void in
if success {
print("success")
} else {
print("failure")
}
if let error = error { print(error) }
}
}

Answer 2

import UIKit
import HealthKit
class HealthKitPage : UIViewController
{
let healthStore: HKHealthStore = HKHealthStore()
override func viewDidLoad()
{
var shareTypes = Set<HKSampleType>()
shareTypes.insert(HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)!)
var readTypes = Set<HKObjectType>()
readTypes.insert(HKQuantityType.quantityTypeForIdentifier(HKQuantityTypeIdentifierStepCount)!)
healthStore.requestAuthorizationToShareTypes(shareTypes, readTypes: readTypes) { (success, error) -> Void in
if success {
print("success")
} else {
print("failure")
}
if let error = error { print(error) }
}
}
}