How to create y-axis for empty label ?

[c1800054work]

Following is using “Charts” for swift 4.0 to show line chart. But the last label will not show normally , and i want to add empty label x-axis to fix this issue.

https://i.stack.imgur.com/hq9sh.jpg

I try to add " " to chartView.xAxis.valueFormatter, but it doesn't add an x-axis.

following is my code:

`x1 = [10.0, 10.0, 11.0, 11.0, 12.0, 12.0, 13.0, 13.0, 14.0, 14.0, 15.0, 15.0, 16.0, 16.0]
x2 = [20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.0]
times = ["8:00"," ","9:00"," ","10:00"," ","11:00"," ","12:00"," ","13:00"," ","14:00"," "]

setChart()

func setChart(){

let lineDefault = UIColor(red: 140.0/255.0, green: 234.0/255.0, blue: 255.0/255.0, alpha: 1.0)

let data = LineChartData()
var lineChartEntry1 = [ChartDataEntry]()

for i in 0..<x1.count {
    lineChartEntry1.append(ChartDataEntry(x: Double(i), y: Double(x1[i])))
}
let line1 = LineChartDataSet(values: lineChartEntry1, label: "a")
line1.drawCirclesEnabled = false
line1.drawValuesEnabled = false
line1.lineWidth = 2
line1.setColor(lineDefault)
data.addDataSet(line1)
if (x2.count > 0) {
    var lineChartEntry2 = [ChartDataEntry]()
    for i in 0..<x2.count {
        lineChartEntry2.append(ChartDataEntry(x: Double(i), y: Double(x2[i])))
    }
    let line2 = LineChartDataSet(values: lineChartEntry2, label: "b")
    line2.drawCirclesEnabled = false
    line2.drawValuesEnabled = false
    line2.lineWidth = 2
    line2.setColor(UIColor.yellow)
    data.addDataSet(line2)
}

let chartFormatter = LineChartFormatter(labels: times)
let xAxis = XAxis()
xAxis.valueFormatter = chartFormatter
mapLineChartView.xAxis.valueFormatter = xAxis.valueFormatter
mapLineChartView.data = data

}

private class LineChartFormatter: NSObject, IAxisValueFormatter {

var labels: [String] = []

func stringForValue(_ value: Double, axis: AxisBase?) -> String {
    return labels[Int(value)]
}

init(labels: [String]) {
    super.init()
    self.labels = labels
}

}`

**Xcode version:10.0
**Swift version:4.0

[c1800054work]

the solution is same with #2608

[c1800054work]

Hi

it will draw the line if there has data and the title is nil.
But there is no y-axis to the line.

the chartview like same with this stackoverflow
https://stackoverflow.com/questions/53187049/how-to-create-empty-label-by-using-charts

Does it possible to show y-axis line?

[liuxuan30]

if you want extra axis labels, meaning you are not satisfied what the auto calculation gives, you can use

    @objc open func setLabelCount(_ count: Int, force: Bool)
    {
        self.labelCount = count
        forceLabelsEnabled = force
    }

to set a proper label count. The formula of interval is (max - min) / count

[jayrawat]

@liuxuan30 can you give any example how you are setting label count by interval as you have mentioned. I want to not use auto calculation & rather set label count based on min/max data