swift - Swift函数执行顺序
问题描述
我正在尝试从 healthkit 加载睡眠数据。检索到一些数据后，我将其转换为 Double 类型以使用图表，并将它们反映在 setChart 函数上。但这里有一些问题。
要成功显示在图表上，我的函数应该按顺序执行。理想的顺序是：检索数据，转换数据 -> 设置图表
但订单没有保留。
我阅读了一些关于 dispatchqueue 的文章，但仍然无法解决问题。
我应该怎么做才能解决这个问题？\
override func viewDidLoad() {
super.viewDidLoad()
//선행작업
DispatchQueue.global(qos: .userInteractive).sync {
print("1")
self.retrieveSleepAnalysis()
}
DispatchQueue.global(qos: .default).sync {
print("2")
self.recentSleepStartHourDouble = self.stringTimeToDouble(stringTime: self.recentSleepStartHour)
self.wakeUp = self.wakeupTimeCalcuation(start: self.recentSleepStartHourDouble, end: self.resultToSleepAmount)
}
DispatchQueue.main.async {
// self.recentSleepStartHourDouble = self.stringTimeToDouble(stringTime: self.recentSleepStartHour)
// self.wakeUp = self.wakeupTimeCalcuation(start: self.recentSleepStartHourDouble, end: self.resultToSleepAmount)
self.setChart(days: self.recentSleepDate.reversed(), sleepTimes: self.recentSleepStartHourDouble.reversed(), wakeupTimes:
public func retrieveSleepAnalysis() {
// first, we define the object type we want
if let sleepType = HKObjectType.categoryType(forIdentifier: HKCategoryTypeIdentifier.sleepAnalysis) {
// print(sleepType)
// Use a sortDescriptor to get the recent data first
let sortDescriptor = NSSortDescriptor(key: HKSampleSortIdentifierEndDate, ascending: false)
// we create our query with a block completion to execute
let query = HKSampleQuery(sampleType: sleepType, predicate: nil, limit: 7, sortDescriptors: [sortDescriptor]) { (query, tmpResult, error) -> Void in
if error != nil {
// something happened
return
}
if let result = tmpResult {
for item in result {
if let sample = item as? HKCategorySample {
let value = (sample.value == HKCategoryValueSleepAnalysis.inBed.rawValue) ? "InBed" : "Asleep"
print("Healthkit sleep: \(sample.startDate) \(sample.endDate) - value: \(value)")
let sleepHour = Calendar.current.component(.hour, from: sample.startDate)
print("현지시각으로 잠든시간 \(sleepHour)")
if sleepHour < 19 && sleepHour > 12{
print("낮잠")
}
else{
self.resultToSleepAmount.append(CFDateGetTimeIntervalSinceDate(sample.endDate as CFDate, sample.startDate as CFDate)/3600)
let myDateFormatter = DateFormatter()
myDateFormatter.dateFormat = "MM / dd"
myDateFormatter.locale = Locale(identifier: "ko_KR")
let sleepDate = myDateFormatter.string(from: sample.startDate)
self.recentSleepDate.append(sleepDate)
let myHourFormatter = DateFormatter()
myHourFormatter.dateFormat = "HHmm"
myHourFormatter.locale = Locale(identifier: "ko_KR")
let sleepStartHour = myHourFormatter.string(from: sample.startDate)
self.recentSleepStartHour.append(sleepStartHour)
print("잠든 시간은 몇시몇분? \(sleepStartHour)")
let sleepEndHour = myHourFormatter.string(from: sample.endDate)
self.recentSleepEndHour.append(sleepEndHour)
}
}
print("total amount of sleep time : \(self.resultToSleepAmount), 현재 크기는 : \(self.resultToSleepAmount.count)")
}
}
}
// finally, we execute our query
healthStore.execute(query)
}