lineChartView 轴 label 在 label 上添加额外的线

Question

hi i want to add a line on top of every label like this

i tried

class XAxisRendererWithTicks: XAxisRenderer {

override func drawLabel(context: CGContext, formattedLabel: String, x: CGFloat, y: CGFloat, attributes: [NSAttributedString.Key: Any], constrainedToSize: CGSize, anchor: CGPoint, angleRadians: CGFloat) {

super.drawLabel(context: context, formattedLabel: formattedLabel, x: x, y: y, attributes: attributes, constrainedToSize: constrainedToSize, anchor: anchor, angleRadians: angleRadians)

context.beginPath()

context.move(to: CGPoint(x: x, y: y))
context.addLine(to: CGPoint(x: x, y: self.viewPortHandler.contentBottom))

context.strokePath()
}}

and

let customXAxisRenderer = XAxisRendererWithTicks(viewPortHandler: lineChartView.viewPortHandler, xAxis: lineChartView.xAxis, transformer: lineChartView.getTransformer(forAxis: .left))
    lineChartView.xAxisRenderer = customXAxisRenderer
    

this can make the short line, but how to remove the short line where is no label?

thanks

Answer 1

i solved my problem by this

override func drawLabel(context: CGContext, formattedLabel: String, x: CGFloat, y: CGFloat, attributes: [NSAttributedString.Key: Any], constrainedToSize: CGSize, anchor: CGPoint, angleRadians: CGFloat) {

    super.drawLabel(context: context, formattedLabel: formattedLabel, x: x, y: y, attributes: attributes, constrainedToSize: constrainedToSize, anchor: anchor, angleRadians: angleRadians)

    if(formattedLabel == ""){
        return
    }
    context.beginPath()

    context.move(to: CGPoint(x: x, y: y))
    context.addLine(to: CGPoint(x: x, y: self.viewPortHandler.contentBottom))

    context.strokePath()
}