SWIFT – a combination chart using iOS-Charts (Line Map and Bar Chart)

I am trying to combine a line chart and bar chart in swift (iOS chart). Both the x-axis and y-axis seem to be scaled correctly, but the data is not displayed on the chart. I missed What’s up?

import UIKit 
import Charts

class CombinedChartsTest: UIViewController {


@IBOutlet weak var combinedChart: CombinedChartView!


let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", " Dec"]
let unitsSold = [2.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 17.0, 2.0, 4.0, 5.0, 4.0]

override func viewDidLoad() {< br /> super.viewDidLoad()

 setChart(months, yValuesLineChart: unitsSold, yValuesBarChart: unitsSold)
}

func setChart(xValues: [String], yValuesLineChart: [Double], yValuesBarChart: [Double]) {
 combinedChart.noDataText = "Please provide data for the chart."

 var yVals1: [ChartDataEntry] = [ChartDataEntry]() 
 var yVals2: [BarChartDataEntry] = [BarChartDataEntry]()

 for i in 0..
 yVals1.append(ChartDataEntry(value: yValuesLineChart[i], xIndex: i))
 yVals2.append(BarChartDataEntry(value: yValuesBarChart[i]-1, xIndex: i ))

 }

 let lineChartSet = LineChartDataSet(yVals: yVals1, label: "Line Data")
 let barChartSet: BarChartDataSet = BarChartDataSet(yVals: yVals2, label: "Bar Data")

 let data: CombinedChartData = CombinedChartData(xVals: xValues, dataSets: [lineChartSet,barChartSet])

 combinedChart.data = data

}
}

import UIKit
import Charts

class CombinedChartsTest: UIViewController {


@ IBOutlet weak var combinedChartView: CombinedChartView!


let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul" , "Aug", "Sep", "Oct", "Nov", "Dec"]
let unitsSold = [2.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 17 .0, 2.0, 4.0, 5.0, 4.0]

override func viewDidLoad() {
 super.viewDidLoad()

 setChart(months, yValuesLineChart: unitsSold, yValuesBarChart: unitsSold)
}

func setChart(xValues: [String], yValuesLineChart: [Double], yValuesBarChart: [Double]) {
 combinedChartView.noDataText = "Please provide data for the chart."

 var yVals1: [ChartDataEntry] = [ChartDataEntry]()
 var yVals2: [BarChartDataEntry] = [BarChartDataEntry]()

 for i in 0..
 yVals1.append(ChartDataEntry(value: yValuesLineChart[i], xIndex: i))
 yVals2.append(BarChartDataEntry(value: yValuesBarChart [i]-1, xIndex: i))

 }

 let lineChartSet = LineChartDataSet(yVals: yVals1, label: "Line Data")
 let barChartSet : BarChartDataSet = BarChartDataSet(yVals: yVals2, label: "Bar Data")


 let data: CombinedChartData = CombinedChartData(xVals: xValue s)
 data.barData = BarChartData(xVals: xValues, dataSets: [barChartSet])
 data.lineData = LineChartData(xVals: xValues, dataSets: [lineChartSet])

 combinedChartView.data = data

}
}

I am trying to combine a line chart and bar in swift (iOS chart) Fig. Both the x-axis and y-axis seem to scale correctly, but the data is not displayed on the chart. What am I missing?

import UIKit 
import Charts

class CombinedChartsTest: UIViewController {


@IBOutlet weak var combinedChart: CombinedChartView!


let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", " Dec"]
let unitsSold = [2.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 17.0, 2.0, 4.0, 5.0, 4.0]

override func viewDidLoad() {< br /> super.viewDidLoad()

 setChart(months, yValuesLineChart: unitsSold, yValuesBarChart: unitsSold)
}

func setChart(xValues: [String], yValuesLineChart: [Double], yValuesBarChart: [Double]) {
 combinedChart.noDataText = "Please provide data for the chart."

 var yVals1: [ChartDataEntry] = [ChartDataEntry]() 
 var yVals2: [BarChartDataEntry] = [BarChartDataEntry]()

 for i in 0..
 yVals1.append(ChartDataEntry(value: yValuesLineChart[i], xIndex: i))
 yVals2.append(BarChartDataEntry(value: yValuesBarChart[i]-1, xIndex: i) )

 }

 let lineChartSet = LineChartDataSet(yVals: yVals1, label: "Line Data")
 let barChartSet: BarChartDataSet = BarChartDataSet(yVals: yVals2, label : "Bar Data")

 let data: CombinedChartData = CombinedChartData(xVals: xValues, dataSets: [lineChartSet,barChartSet])

 combinedChart.data = data
 
}
}

I finally found what was missing.

import UIKit
import Charts

class CombinedChartsTest: UIViewController {


@IBOutlet weak var combinedChartView: CombinedChartView!


let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
let unitsSold = [2.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 17.0, 2.0, 4.0, 5.0, 4.0]

override func viewDid Load() {
 super.viewDidLoad()

 setChart(months, yValuesLineChart: unitsSold, yValuesBarChart: unitsSold)
}

func setChart(xValues : [String], yValuesLineChart: [Double], yValuesBarChart: [Double]) {
 combinedChartView.noDataText = "Please provide data for the chart."

 var yVals1: [ChartDataEntry] = [ChartDataEntry]()
 var yVals2: [BarChartDataEntry] = [BarChartDataEntry]()

 for i in 0..
 yVals1. append(ChartDataEntry(value: yValuesLineChart[i], xIndex: i))
 yVals2.append(BarChartDataEntry(value: yValuesBarChart[i]-1, xIndex: i))

 }< br />
 let lineChartSet = LineChartDataSet(yVals: yVals1, label: "Line Data")
 let barChartSet: BarChartDataSet = BarChartDataSet(yVals: yVals2, label: "Bar Data")
< br />
 let data: CombinedChartData = CombinedChartData(xVals: xValues)
 data.barData = BarChartData(xVals: xValues, dataSets: [barChartSet])
 data.lineData = LineChartData(xVals: xValues, dataSets: [lineChartSet])

 combinedChartView.data = data

}
}