Question

我有这个问题：每当我在分段控件的各段之间切换时，数据都会混乱，但只有当我在运行时切换并且只在0段中切换时，无论切换多少次，1段都能正常工作。这是一个解释我的意思的gif：

如何处理这个问题？这是一些代码

分段控件的ibaction函数

@IBAction func timeSelectionSegControl(_ sender: UISegmentedControl) {
switch sender.selectedSegmentIndex {
case 0:
    last7Filler()
case 1:
    todayFiller()
case 2:
    last30Filler()
default:
    break
} }

todayFiller()（运作良好的那个）：

func todayFiller() {
emptyArrays()
low = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Bassa intensità")
mid = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Media intensità")
high = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Alta intensità")

for i in low {
    if i.date == currentDate() {       //put in arrays xxxA the elements which have the property .date equals to today
        lowA.append(i)
    }
}

for i in mid {
    if i.date == currentDate() {
        midA.append(i)
    }
}

for i in high {
    if i.date == currentDate() {
        highA.append(i)
    }
}

//low severity fill funcs FOR TIME
if !lowA.isEmpty || !midA.isEmpty || !highA.isEmpty {
    fillBarChart()
    var lowSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceLow = lowA.reduce(into: [String: [Cig]]()) {
        $0[$1.time!.returnFirstNcharacters(n: 3), default: []].append($1)}
    let sortedKeysLow = Array(crossReferenceLow.keys).sorted(by: <)

    for key in sortedKeysLow {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })

        if matchingTerms.isEmpty {
            print("no elements found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let indexString = matchingTerms[0]
            let first3 = indexString.returnFirstNcharacters(n: 3)

            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceLow[first3]?.count)!))
            lowSeverityDataEntry.append(value)
            doubleArray.append(Double(index!))
            doubleArrayMax.append(Double((crossReferenceLow[first3]?.count)!))
        }
    }


    let lowSeverityLine = LineChartDataSet(values: lowSeverityDataEntry, label: "Bassa")
    lowSeverityLine.colors = [NSUIColor.green]
    lowSeverityLine.mode = .cubicBezier
    lowSeverityLine.lineCapType = self.lineCap
    lowSeverityLine.lineWidth = self.lineWidth
    lowSeverityLine.circleRadius = self.circleRadius
    lowSeverityLine.circleColors = [NSUIColor.green]
    lowSeverityLine.circleHoleColor = NSUIColor.white
    lowSeverityLine.circleHoleRadius = self.circleHoleRadius
    lowSeverityLine.drawValuesEnabled = false

    //mid severity fill funcs FOR TIME
    var midSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceMid = midA.reduce(into: [String: [Cig]]()) {
        $0[$1.time!.returnFirstNcharacters(n: 3), default: []].append($1)}
    let sortedKeysMid = Array(crossReferenceMid.keys).sorted(by: <)

    for key in sortedKeysMid {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })

        if matchingTerms.isEmpty {
            print("no elements found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let indexString = matchingTerms[0]
            let first3 = indexString.returnFirstNcharacters(n: 3)

            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceMid[first3]?.count)!))
            midSeverityDataEntry.append(value)
            doubleArray.append(Double(index!))
            doubleArrayMax.append(Double((crossReferenceMid[first3]?.count)!))
        }
    }

    let midSeverityLine = LineChartDataSet(values: midSeverityDataEntry, label: "Media")
    midSeverityLine.colors = [NSUIColor.yellow]
    midSeverityLine.mode = .cubicBezier
    midSeverityLine.lineCapType = self.lineCap
    midSeverityLine.lineWidth = self.lineWidth
    midSeverityLine.circleRadius = self.circleRadius
    midSeverityLine.circleColors = [NSUIColor.yellow]
    midSeverityLine.circleHoleColor = NSUIColor.white
    midSeverityLine.circleHoleRadius = self.circleHoleRadius
    midSeverityLine.drawValuesEnabled = false


    //high severity fill funcs FOR TIME
    var highSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceHigh = highA.reduce(into: [String: [Cig]]()) {
        $0[$1.time!.returnFirstNcharacters(n: 3), default: []].append($1)}
    let sortedKeysHigh = Array(crossReferenceHigh.keys).sorted(by: <)

    for key in sortedKeysHigh {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })

        if matchingTerms.isEmpty {
            print("no elements found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let indexString = matchingTerms[0]
            let first3 = indexString.returnFirstNcharacters(n: 3)
            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceHigh[first3]?.count)!))
            highSeverityDataEntry.append(value)
            doubleArray.append(Double(index!))
            doubleArrayMax.append(Double((crossReferenceHigh[first3]?.count)!))
        }
    }

    let highSeverityLine = LineChartDataSet(values: highSeverityDataEntry, label: "Alta")
    highSeverityLine.colors = [NSUIColor.red]
    highSeverityLine.mode = .cubicBezier
    highSeverityLine.lineCapType = self.lineCap
    highSeverityLine.lineWidth = self.lineWidth
    highSeverityLine.circleRadius = self.circleRadius
    highSeverityLine.circleColors = [NSUIColor.red]
    highSeverityLine.circleHoleColor = NSUIColor.white
    highSeverityLine.circleHoleRadius = self.circleHoleRadius
    highSeverityLine.drawValuesEnabled = false

    let data = LineChartData()
    data.addDataSet(lowSeverityLine)
    data.addDataSet(midSeverityLine)
    data.addDataSet(highSeverityLine)

    lineChartView.data = data

    guard let min = doubleArray.min() else {return}
    guard let max = doubleArrayMax.max() else {return}
    lineChartView.xAxis.axisMinimum = min
    lineChartView.leftAxis.axisMaximum = max
    let myXaxis = lineChartView.xAxis
    myXaxis.granularity = 1.0
    myXaxis.axisMaximum = Double(values.count)
    myXaxis.labelPosition = .bottom
    myXaxis.gridLineWidth = 0.2
    myXaxis.axisLineWidth = 1.0
    myXaxis.axisLineColor = UIColor.black
    myXaxis.valueFormatter = IndexAxisValueFormatter(values: values)

    let yLeftAxis = lineChartView.leftAxis
    yLeftAxis.granularity = 1.0
    yLeftAxis.axisMinimum = 0.0
    yLeftAxis.gridLineWidth = 0.2
    yLeftAxis.axisLineWidth = 1.0
    yLeftAxis.axisLineColor = UIColor.black

    lineChartView.rightAxis.enabled = false
    lineChartView.chartDescription?.text = ""
    lineChartView.animate(xAxisDuration: 1.0, easingOption: .linear)


} else {
    lineChartView.noDataText = "Nessuna sigaretta fumata oggi"
    barChartView.noDataText = "Nessuna sigaretta fumata oggi"
} }

last7Filler() func（给我带来问题的那个）：

func last7Filler() {
emptyArrays()
low = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Bassa intensità")
mid = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Media intensità")
high = CoreDataController.shared.loadCigFromSeverityNumber(severity: "Alta intensità")

for i in low {
    let first3Date = i.date!.returnFirstNcharacters(n: 3)
    for a in past7Days() {
        let first3Day = "\(a)-"
        if first3Date == first3Day {
            lowA.append(i)
        }
    }
}
for i in mid {
    let first3Date = i.date!.returnFirstNcharacters(n: 3)
    for a in past7Days() {
        let first3Day = "\(a)-"
        if first3Date == first3Day {
            midA.append(i)
        }
    }
}
for i in high {
    let first3Date = i.date!.returnFirstNcharacters(n: 3)
    for a in past7Days() {
        let first3Day = "\(a)-"
        if first3Date == first3Day {
            highA.append(i)
        }
    }
}

if !lowA.isEmpty || !midA.isEmpty || !highA.isEmpty {

    fillBarChart()
    var lowSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceLow = lowA.reduce(into: [String:[Cig]]() ) {
        $0[$1.date!.returnFirstNcharacters(n: 5), default: []].append($1)}
    let sortedKeysLow = Array(crossReferenceLow.keys).sorted(by: <)

    for key in sortedKeysLow {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })

        if matchingTerms.isEmpty {
            print("no elements found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceLow[key]?.count)!))
            lowSeverityDataEntry.append(value)
        }
    }

    let lowSeverityLine = LineChartDataSet(values: lowSeverityDataEntry, label: "Bassa")
    lowSeverityLine.colors = [NSUIColor.green]
    lowSeverityLine.mode = .cubicBezier
    lowSeverityLine.lineCapType = self.lineCap
    lowSeverityLine.lineWidth = self.lineWidth
    lowSeverityLine.circleRadius = self.circleRadius
    lowSeverityLine.circleColors = [NSUIColor.green]
    lowSeverityLine.circleHoleColor = NSUIColor.white
    lowSeverityLine.circleHoleRadius = self.circleHoleRadius
    lowSeverityLine.drawValuesEnabled = false


    var midSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceMid = midA.reduce(into: [String: [Cig]]() ) {
        $0[$1.date!.returnFirstNcharacters(n: 5), default: []].append($1)}
    let sortedKeysMid = Array(crossReferenceMid.keys).sorted(by: <)

    for key in sortedKeysMid {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })

        if matchingTerms.isEmpty {
            print("no elements found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceMid[key]?.count)!))
            midSeverityDataEntry.append(value)
        }
    }

    let midSeverityLine = LineChartDataSet(values: midSeverityDataEntry, label: "Media")
    midSeverityLine.colors = [NSUIColor.yellow]
    midSeverityLine.mode = .cubicBezier
    midSeverityLine.lineCapType = self.lineCap
    midSeverityLine.lineWidth = self.lineWidth
    midSeverityLine.circleRadius = self.circleRadius
    midSeverityLine.circleColors = [NSUIColor.yellow]
    midSeverityLine.circleHoleColor = NSUIColor.white
    midSeverityLine.circleHoleRadius = self.circleHoleRadius
    midSeverityLine.drawValuesEnabled = false


    var highSeverityDataEntry = [ChartDataEntry]()
    let crossReferenceHigh = highA.reduce(into: [String: [Cig]]()) {
        $0[$1.date!.returnFirstNcharacters(n: 5), default: []].append($1)}
    let sortedKeysHigh = Array(crossReferenceHigh.keys).sorted(by: <)

    for key in sortedKeysHigh {
        let matchingTerms = values.filter({
            $0.range(of: key, options: .caseInsensitive) != nil
        })
        if matchingTerms.isEmpty {
            print("no element found in \(key)")
        } else {
            let index = values.index(of: matchingTerms[0])
            let value = ChartDataEntry(x: Double(index!), y: Double((crossReferenceHigh[key]?.count)!))
            highSeverityDataEntry.append(value)
        }
    }
    let highSeverityLine = LineChartDataSet(values: highSeverityDataEntry, label: "Alta")
    highSeverityLine.colors = [NSUIColor.red]
    highSeverityLine.mode = .cubicBezier
    highSeverityLine.lineCapType = self.lineCap
    highSeverityLine.lineWidth = self.lineWidth
    highSeverityLine.circleRadius = self.circleRadius
    highSeverityLine.circleColors = [NSUIColor.red]
    highSeverityLine.circleHoleColor = NSUIColor.white
    highSeverityLine.circleHoleRadius = self.circleHoleRadius
    highSeverityLine.drawValuesEnabled = false

    let data = LineChartData()
    data.addDataSet(lowSeverityLine)
    data.addDataSet(midSeverityLine)
    data.addDataSet(highSeverityLine)

    lineChartView.data = data
    lineChartView.notifyDataSetChanged()
    lineChartView.data!.notifyDataChanged()


    //graphic configuration
    let myXaxis = lineChartView.xAxis
    myXaxis.granularity = 1.0
    myXaxis.axisMinimum = 0.0
    myXaxis.axisMaximum = Double(values.count)
    myXaxis.labelPosition = .bottom
    myXaxis.gridLineWidth = 0.2
    myXaxis.axisLineWidth = 1.0
    myXaxis.axisLineColor = UIColor.black
    myXaxis.valueFormatter = IndexAxisValueFormatter(values: values)

    let yLeftAxis = lineChartView.leftAxis
    yLeftAxis.granularity = 1.0
    yLeftAxis.axisMinimum = 0.0
    yLeftAxis.gridLineWidth = 0.2
    yLeftAxis.axisLineWidth = 1.0
    yLeftAxis.axisLineColor = UIColor.black

    lineChartView.rightAxis.enabled = false
    lineChartView.chartDescription?.text = ""
    lineChartView.animate(xAxisDuration: 1.0, easingOption: .linear)

} else {
    lineChartView.noDataText = "Nessuna sigaretta fumata nei scorsi 7 giorni"
    barChartView.noDataText = "Nessuna sigaretta fumata nei scorsi 7 giorni"
}

P.S。函数emptyArrays()仅向数组removeAll()，low，mid，high，lowA和{{1}提供midA }}

iOS图表，折线图不刷新数据

0 个答案: