如何将stepCount输出到文本字符串(UILabel)

Question

为我的格式、缺乏理解、术语等道歉。我只学了两天，所以我仍然不太明白。 我是一名平面设计师，我正在尝试制作一个供个人使用的应用程序，需要一些数据，并使其看起来更具视觉吸引力。我想为当天创建步数，并从健康应用中提取此信息。

首先，我已经到了可以调用HealthKit StepCount向我展示当天采取的步骤的地步。只要我使用按钮(IBAction(获取stepCount数据，然后输出到文本字符串(UILabel(，这就会成功。 (例如，数字输出的小数点后为 66.0，但一次一步哈！

现在，我想简单地自动填充"总步骤 UILabel"以显示步数，而不必通过按下按钮来操作它。

我已经尝试了很多不同的方法，我已经忘记了我尝试过的内容以及我把尝试的代码放在哪里，所以任何帮助和/或简短的解释都会很棒！

谢谢

import UIKit
import HealthKit
class ViewController: UIViewController {
@IBOutlet weak var totalSteps: UILabel!
@IBOutlet weak var quotePhrase: UITextView!
let healthStore = HKHealthStore()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.

func authoriseHealthKitAccess(_ sender: Any) {
let healthKitTypes: Set = [
// access step count
HKObjectType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)!
]
healthStore.requestAuthorization(toShare: healthKitTypes, read: healthKitTypes) { (_, _) in
print("authrised???")
}
healthStore.requestAuthorization(toShare: healthKitTypes, read: healthKitTypes) { (bool, error) in
if let e = error {
print("oops something went wrong during authorisation (e.localizedDescription)")
} else {
print("User has completed the authorization flow")
}
}
}  
}
func getTodaysSteps(completion: @escaping (Double) -> Void) {
let stepsQuantityType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
let now = Date()
let startOfDay = Calendar.current.startOfDay(for: now)
let predicate = HKQuery.predicateForSamples(withStart: startOfDay, end: now, options: .strictStartDate)
let query = HKStatisticsQuery(quantityType: stepsQuantityType, quantitySamplePredicate: predicate, options: .cumulativeSum) { (_, result, error) in
var resultCount = 0.0
guard let result = result else {
print("Failed to fetch steps rate")
completion(resultCount)
return
}
if let sum = result.sumQuantity() {
resultCount = sum.doubleValue(for: HKUnit.count())
}
DispatchQueue.main.async {
completion(resultCount)
}
}
healthStore.execute(query)
}
//Button Action Here:
@IBAction func getTotalSteps(_ sender: Any) {
getTodaysSteps { (result) in
print("(result)")
DispatchQueue.main.async {
self.totalSteps.text = "(result)"
}
}
}
}

Answer 1

您只需要在viewDidLoad内调用相同的代码即可。当用户授予访问健康数据的权限时，还应调用该代码。我在下面的代码中介绍了这两种情况。

import UIKit
import HealthKit
class ViewController: UIViewController {
@IBOutlet weak var totalSteps: UILabel!
@IBOutlet weak var quotePhrase: UITextView!
let healthStore = HKHealthStore()
override func viewDidLoad() {
super.viewDidLoad()
self.authoriseHealthKitAccess()
}
func authoriseHealthKitAccess() {
let healthKitTypes: Set = [
// access step count
HKObjectType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount)!
]
healthStore.requestAuthorization(toShare: healthKitTypes, read: healthKitTypes) { [weak self] (bool, error) in
if let e = error {
print("oops something went wrong during authorisation (e.localizedDescription)")
} else {
print("User has completed the authorization flow")
self?.updateStepsCountLabel()
}
}
}
func getTodaysSteps(completion: @escaping (Double) -> Void) {
let stepsQuantityType = HKQuantityType.quantityType(forIdentifier: .stepCount)!
let now = Date()
let startOfDay = Calendar.current.startOfDay(for: now)
let predicate = HKQuery.predicateForSamples(withStart: startOfDay, end: now, options: .strictStartDate)
let query = HKStatisticsQuery(quantityType: stepsQuantityType, quantitySamplePredicate: predicate, options: .cumulativeSum) { (_, result, error) in
var resultCount = 0.0
guard let result = result else {
print("Failed to fetch steps rate")
completion(resultCount)
return
}
if let sum = result.sumQuantity() {
resultCount = sum.doubleValue(for: HKUnit.count())
}
DispatchQueue.main.async {
completion(resultCount)
}
}
healthStore.execute(query)
}
private func updateStepsCountLabel() {
getTodaysSteps { (result) in
print("(result)")
DispatchQueue.main.async {
self.totalSteps.text = "(result)"
}
}
}
//Button Action Here:
@IBAction func getTotalSteps(_ sender: Any) {
updateStepsCountLabel()
}
}