BarChartView height is not reflecting the values assigned to it.

[LekhaP]

Hi,

Currently what i have right now is

The values i am sending to the chart is :
var str: [String] = ["1","2"];
var score: [Double] = [1,0.5];
setChart(str, values: score)

And i have used the formatter as:
let percentageNumberFormatter = NSNumberFormatter()
percentageNumberFormatter.numberStyle = .PercentStyle
chartDataSet.valueFormatter = percentageNumberFormatter

Its not reflecting 100% and 50% in proportion. It rather looks like 100% and 5%.

Could somebody help me understand what i might be doing wrong.

Thank you advance.

[liuxuan30]

can you check ChartsDemo? I think you must missed something. But without details we can't say what's wrong.

[LekhaP]

Here is the code i used for the charts.

@IBOutlet var barChartView: BarChartView!

func setChart(dataPoints: [String], values: [Double]) {

    var dataEntries: [BarChartDataEntry] = []
    for i in 0..<dataPoints.count {
        let dataEntry = BarChartDataEntry(value: Double(values[i]), xIndex: i)
        dataEntries.append(dataEntry)
    }

    let chartDataSet = BarChartDataSet(yVals: dataEntries, label:"Quiz Scores on chapters(%)")
    let chartData = BarChartData(xVals: dataPoints, dataSet: chartDataSet)
    barChartView.data = chartData


    // valueFormatter
    let percentageNumberFormatter = NSNumberFormatter()
    percentageNumberFormatter.numberStyle = .PercentStyle
    chartDataSet.valueFormatter = percentageNumberFormatter


    barChartView.data?.setValueFont(UIFont.systemFontOfSize(9.0))
    barChartView.data?.setValueTextColor(UIColor(red: 216/255, green: 76/255, blue: 62/255, alpha: 1))
    chartDataSet.colors = [UIColor(red: 216/255, green: 76/255, blue: 62/255, alpha: 1)]

    barChartView.descriptionText = ""
    barChartView.drawBarShadowEnabled = false;
    barChartView.drawValueAboveBarEnabled = true;

    let xAxis:ChartXAxis = barChartView.xAxis
    xAxis.labelPosition = .Bottom
    xAxis.labelFont = UIFont.systemFontOfSize(9.0)
    xAxis.drawGridLinesEnabled = false
    xAxis.spaceBetweenLabels = 0
    xAxis.labelTextColor = UIColor(red: 77/255, green: 85/255, blue: 95/255, alpha: 1)


    //hide left and right axis
    barChartView.leftAxis.enabled = false
    barChartView.leftAxis.drawGridLinesEnabled = false
    barChartView.rightAxis.enabled = false
    barChartView.rightAxis.drawGridLinesEnabled = false

    barChartView.legend.enabled = false;
    barChartView.userInteractionEnabled = false
}

Thats pretty much all i have.
I looked at the ChartsDemo. It din really help much.

[liuxuan30]

try put barChartView.data = chartData at last line of your func. I see you changing lots of view properties after you set data, which is wrong. You either call data setter at last, or manually call notifyDataSetChanged()

[danielgindi]

You chart is probably being offset. Either by limiting the Y axis with a minimum value that's around 45%, or viewport translations.