我正在制作计步器并使用 luispadron 的 UICircularProgressRing。我正在尝试更新我的 circularProgressRing 以将环的当前状态显示为用户在 7 天 lineChart 中选择的状态。例如：用户点击图表上的值 2309(steps)，然后 circularProgressRing 更新以显示 2309 步。
func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
let generator = UISelectionFeedbackGenerator()
generator.selectionChanged()
print(self.circularProgressRing.value = CGFloat(1000))
这会将 circularProgressRing 更新为 1000 并且运行良好。现在的问题是如何在 updateStepsWeekly(completion: @escaping (Double) -> Void) 中获取 7 天的步长值，并根据用户对不同值的点击来更新 circularProgressRing？
//Get Steps from HealthKit and Graph daily steps for past 7 days
func updateStepsWeekly(completion: @escaping (Double) -> (Void)) {
let calendar = NSCalendar.current
let interval = NSDateComponents()
interval.day = 1
// Set the anchor date to Monday at 3:00 a.m.
var anchorComponents = calendar.dateComponents([.year, .month, .day], from: Date())
anchorComponents.hour = 0
guard let anchorDate = calendar.date(from: anchorComponents)
else {
fatalError("*** unable to create a valid date from the given components ***")
}
guard let quantityType = HKObjectType.quantityType(forIdentifier: HKQuantityTypeIdentifier.stepCount) else {
fatalError("*** Unable to create a step count type ***")
}
// Create the query
let query = HKStatisticsCollectionQuery(quantityType: quantityType, quantitySamplePredicate: nil, options: .cumulativeSum, anchorDate: anchorDate, intervalComponents: interval as DateComponents)
// Set the results handler
query.initialResultsHandler = {query, results, error in
guard results != nil else {
// Perform proper error handling here
fatalError("*** An error occurred while calculating the statistics: \(error?.localizedDescription) ***")
}
let endDate = Date()
guard let startDate = calendar.date(byAdding: .day, value: -6, to: endDate as Date)
else {
fatalError("*** Unable to calculate the start date ***")
}
//Plot the daily step counts over the past 7 days
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "E"
results?.enumerateStatistics(from: startDate, to: endDate){[unowned self] statistics, stop in
let date = statistics.startDate
let value: Double
if let quantity = statistics.sumQuantity() {
value = quantity.doubleValue(for: HKUnit.count())
print("\(date): \(value)")
} else {
value = 0
}
self.numbers.append(value)
let dayOfTheWeekString = dateFormatter.string(from: date)
self.days.append(dayOfTheWeekString)
}
//Wait for the numbers array to append all 7 values
DispatchQueue.main.async {
self.updateGraph(numbers: self.numbers)
self.numbers.removeAll()
self.days.removeAll()
}
}
self.healthStore.execute(query)
}
这是在 updateStepsWeekly 中调用的图形函数：
func updateGraph(numbers: [Double]) {
var lineChartEntry = [ChartDataEntry]()
let gradientColors = [UIColor.orange.cgColor, UIColor.clear.cgColor] as CFArray
let colorLocations:[CGFloat] = [0.5, 0.0]
let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors, locations: colorLocations)
let marker: BalloonMarker = BalloonMarker(color: UIColor(red: 93/255, green: 186/255, blue: 215/255, alpha: 0), font: UIFont(name: "HelveticaNeue-Medium", size: 12)!, textColor: UIColor.white, insets: UIEdgeInsets(top: 7.0, left: 7.0, bottom: 25.0, right: 7.0))
marker.minimumSize = CGSize(width: 35.0, height: 35.0)
let fontType = UIFontDescriptor(name: "HelveticaNeue-Medium", size: CGFloat(15.0))
let xAxis: XAxis = self.lineChart.xAxis
xAxis.labelFont = UIFont(descriptor: fontType, size: CGFloat(13.0))
for i in 0..<numbers.count {
let value = ChartDataEntry(x: Double(i), y: Double(numbers[i]))
lineChartEntry.append(value)
}
let line1 = LineChartDataSet(entries: lineChartEntry, label: "Days")
line1.drawValuesEnabled = true
line1.valueColors = [NSUIColor.white]
line1.valueTextColor = NSUIColor.clear
line1.colors = [NSUIColor.orange]
line1.drawCircleHoleEnabled = true
line1.circleRadius = CGFloat(5)
line1.circleHoleRadius = CGFloat(0)
line1.circleHoleColor = NSUIColor.yellow
line1.circleColors = [NSUIColor.systemYellow]
line1.lineWidth = CGFloat(5)
line1.fill = Fill.fillWithLinearGradient(gradient!, angle: 90.0) // Set the Gradient
line1.drawFilledEnabled = true
line1.drawHorizontalHighlightIndicatorEnabled = false
line1.drawVerticalHighlightIndicatorEnabled = false
line1.highlightLineWidth = CGFloat(0.3)
line1.highlightColor = NSUIColor.white
line1.mode = .cubicBezier
line1.cubicIntensity = CGFloat(0.17)
lineChart.drawGridBackgroundEnabled = true
lineChart.gridBackgroundColor = NSUIColor.black
lineChart.drawBordersEnabled = false
lineChart.backgroundColor = UIColor.black
lineChart.noDataText = ""
lineChart.legend.enabled = false
lineChart.extraLeftOffset = 20
lineChart.extraRightOffset = 20
lineChart.isMultipleTouchEnabled = false
lineChart.isUserInteractionEnabled = true
lineChart.pinchZoomEnabled = false
lineChart.dragEnabled = true
lineChart.dragXEnabled = true
lineChart.dragYEnabled = true
lineChart.scaleXEnabled = false
lineChart.scaleYEnabled = false
lineChart.doubleTapToZoomEnabled = false
lineChart.highlightPerDragEnabled = true
lineChart.highlightPerTapEnabled = true
lineChart.marker = marker
lineChart.resetViewPortOffsets()
lineChart.minOffset = CGFloat(0)
lineChart.leftAxis.labelTextColor = UIColor.white
lineChart.leftAxis.drawLabelsEnabled = false
lineChart.leftAxis.drawGridLinesEnabled = false
lineChart.leftAxis.drawAxisLineEnabled = false
lineChart.leftAxis.removeAllLimitLines()
lineChart.leftAxis.drawZeroLineEnabled = false
lineChart.leftAxis.drawLimitLinesBehindDataEnabled = false
lineChart.rightAxis.drawLabelsEnabled = false
lineChart.rightAxis.drawGridLinesEnabled = false
lineChart.rightAxis.drawAxisLineEnabled = false
lineChart.rightAxis.removeAllLimitLines()
lineChart.rightAxis.drawZeroLineEnabled = false
lineChart.rightAxis.drawLimitLinesBehindDataEnabled = false
lineChart.xAxis.labelTextColor = UIColor.white
lineChart.xAxis.labelPosition = .bottom
lineChart.xAxis.valueFormatter = self
lineChart.xAxis.drawGridLinesEnabled = false
lineChart.xAxis.drawAxisLineEnabled = true
let dashLength:[CGFloat] = [2.0]
lineChart.xAxis.axisLineDashPhase = CGFloat(1)
lineChart.xAxis.axisLineDashLengths = dashLength
lineChart.xAxis.drawLabelsEnabled = true
lineChart.xAxis.drawLimitLinesBehindDataEnabled = false
lineChart.xAxis.granularityEnabled = true
lineChart.xAxis.granularity = 1
lineChart.xAxis.valueFormatter = IndexAxisValueFormatter(values: days)
if lineChart.isDragDecelerationEnabled {
line1.drawVerticalHighlightIndicatorEnabled = true
}
let data = LineChartData()
data.addDataSet(line1)
lineChart.data = data
lineChart.notifyDataSetChanged()
}
