iOS Swift Charts Display X-Axis Error

Question

I am using the Charts framework found here.

My graphs look like this:

My left graph has a bunch of values under my first bar and my second graph is missing a value under my second bar. My function to set up the graph is as follows:

func setChart(chartview: BarChartView, xarray: [String], yarray: [Double]){

        var dataEntries: [BarChartDataEntry] = []


        for i in 0..<xarray.count {

            let dataEntry = BarChartDataEntry(x: Double(i), y: Double(yarray[i]))

            dataEntries.append(dataEntry)
        }

        let chartDataSet = BarChartDataSet(values: dataEntries, label: "")

        let chartData = BarChartData(dataSet: chartDataSet)

        chartview.xAxis.valueFormatter = IndexAxisValueFormatter(values:xarray)

        chartview.xAxis.labelPosition = .bottom

        chartview.chartDescription?.enabled = false

        chartview.rightAxis.enabled = false

        chartview.legend.enabled = false

        chartview.data = chartData

    }

I use the same functions to create other graphs and they show up fine but for some reason sometimes they show like this.

Update:

Below are both arrays during runtime for each graph:

Graph 1:

["iOS 10", "iOS 9"]
[67.0, 19.0]

Graph 2:

["2.1.0.6", "2.1.0.5", "2.0.32", "2.0.30", "2.0.23", "1.3.2.8"]
[67.0, 7.0, 4.0, 5.0, 2.0, 1.0]

Can you please post some sample arrays data for the second graph? — Vini App
– Vini App, Commented Aug 28, 2017 at 5:55
I have provided the print out of both xarray and yarray at runtime for both graphs above. — Martheli
– Martheli, Commented Aug 28, 2017 at 14:57
There is no problem with your code. May be sometimes you are getting wrong data? Like ["2.1.0.6", "", "2.0.32", "2.0.30", "2.0.23", "1.3.2.8"] — Vini App
– Vini App, Commented Aug 28, 2017 at 20:18
chartview.xAxis.valueFormatter = IndexAxisValueFormatter(values:xarray) is what is setting the values so I printed out xarray and the array is perfectly fine. It only shows "iOS 10, iOS 9" but it prints out iOS 10 three times. — Martheli
– Martheli, Commented Aug 28, 2017 at 20:26

Vini App · Accepted Answer · 2017-08-28 20:33:27Z

5

Please try this :

barChartView.xAxis.granularityEnabled = true

answered Aug 28, 2017 at 20:33

Vini App

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3 Comments

Martheli Over a year ago

I think that fixed it. What does that do?

Vini App Over a year ago

/// When true, axis labels are controlled by the granularity property. /// When false, axis values could possibly be repeated. /// This could happen if two adjacent axis values are rounded to same value. /// If using granularity this could be avoided by having fewer axis values visible. Default value for granularityEnabled is false

Martheli Over a year ago

Would you happen to know how to solve the issue here: github.com/danielgindi/Charts/issues/2751

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