当涉及到更新处理程序时,我似乎无法在HealthKit中处理长时间运行的查询。我问是因为当我将代码上传到物理设备时,我的数据被重新加载并附加到我的数组中,这将向屏幕添加额外的数据。根据我的理解,updateHandlers在后台监视新数据/值以更新新视图中的值。我试图模仿苹果健身/健康应用程序,其中值更新并显示给用户,而不必关闭应用程序或切换视图。我试图简洁地编写代码,主要是为了了解updateHandler。我试图停止查询和.onDisappear修饰符,但.onDisappear不会更新值,除非我强制关闭应用程序并再次打开它。
//Properties within my view model for resting HR.
var restingHRquery: HKStatisticsCollectionQuery?
@Published var restingHR: [RestingHeartRate] = [RestingHeartRate]()
func calculateRestingHRData() {
let restingHRpredicate = HKQuery.predicateForSamples(withStart: oneWeekAgo, end: nil, options: .strictStartDate)
restingHRquery = HKStatisticsCollectionQuery(quantityType: restingHeartRateType,
quantitySamplePredicate: restingHRpredicate,
options: .discreteAverage,
anchorDate: anchorDate,
intervalComponents: daily)
restingHRquery!.initialResultsHandler = {
restingQuery, statisticsCollection, error in
//Handle errors here
if let error = error as? HKError {
switch (error.code) {
case .errorHealthDataUnavailable:
return
case .errorNoData:
return
default:
return
}
}
guard let statisticsCollection = statisticsCollection else { return}
//Calculating resting HR
statisticsCollection.enumerateStatistics(from: self.startDate, to: self.date) { statistics, stop in
if let restHRquantity = statistics.averageQuantity() {
let hrdate = statistics.startDate
//HR Units
let hrUnit = HKUnit(from: "count/min")
let restHRvalue = restHRquantity.doubleValue(for: hrUnit)
let restHR = RestingHeartRate(restingValue: Int(restHRvalue), date: hrdate)
DispatchQueue.main.async {
self.restingHR.append(restHR)
}
}
}
}
restingHRquery!.statisticsUpdateHandler = {
restingQuery, statistics, statisticsCollection, error in
//Handle errors here
if let error = error as? HKError {
switch (error.code) {
case .errorHealthDataUnavailable:
return
case .errorNoData:
return
default:
return
}
}
guard let statisticsCollection = statisticsCollection else { return}
//Calculating resting HR
statisticsCollection.enumerateStatistics(from: self.startDate, to: self.date) { statistics, stop in
if let restHRquantity = statistics.averageQuantity() {
let hrdate = statistics.startDate
//HR Units
let hrUnit = HKUnit(from: "count/min")
let restHRvalue = restHRquantity.doubleValue(for: hrUnit)
let restHR = RestingHeartRate(restingValue: Int(restHRvalue), date: hrdate)
DispatchQueue.main.async {
self.restingHR.append(restHR)
}
}
}
}
guard let restingHRquery = self.restingHRquery else { return }
self.healthStore?.execute(restingHRquery)
}
我的图表总是被更新,这导致它重新加载我的列表,并在图表上绘制新的数据,这使得线条变得疯狂。我使用EnvironmentObject,因为它是一个子视图。我只是直接进入图表视图
struct OneWeekRestHRChartView: View {
@EnvironmentObject var healthStoreVM: HealthStoreViewModel
var body: some View {
VStack(alignment: .leading, spacing: 10) {
Text("Average: \(healthStoreVM.averageRestHR) bpm")
.font(.headline)
Chart {
ForEach(healthStoreVM.restingHR.reversed(), id: \.date) {
restHrData in
LineMark(x: .value("day", restHrData.date, unit: .day),
y: .value("RHR", restHrData.restingValue)
)
.interpolationMethod(.catmullRom)
.foregroundStyle(.red)
.symbol() {
Circle()
.fill(.red)
.frame(width: 15)
}
}
}
.frame(height: 200)
.chartYScale(domain: 30...80)
.chartXAxis {
AxisMarks(values: .stride(by: .day)) {
AxisGridLine()
AxisValueLabel(format: .dateTime.day().month(), centered: true)
}
}
}
.padding(.horizontal)
.navigationTitle("Resting Heart Rate")
List{
ForEach(healthStoreVM.restingHR.reversed(), id: \.date) {
restHR in
DataListView(imageText: "heart.fill",
imageColor: .red,
valueText: "\(restHR.restingValue) bpm",
date: restHR.date)
}
}
.listStyle(.inset)
}
}
这可能只是SwiftUI图表问题吗?
1条答案
按热度按时间epggiuax1#
statisticsUpdateHandler
不是只使用新结果调用的,而是使用更新后的完整结果集调用的。在再次添加结果之前,需要从
restingHR
中清除现有结果。