Charts: ¿Qué atributo controla la línea amarilla, como la imagen?

como esconderlo

DataSet.highlightEnabled = falso
highlightEnabled.highlightColor = UIColor.clear

respuesta correcta:

    <strong i="6">@objc</strong> open func drawHighlightLines(context: CGContext, point: CGPoint, set: ILineScatterCandleRadarChartDataSet)
    {

        // draw vertical highlight lines
        if set.isVerticalHighlightIndicatorEnabled
        {
            context.beginPath()
            context.move(to: CGPoint(x: point.x, y: viewPortHandler.contentTop))
            context.addLine(to: CGPoint(x: point.x, y: viewPortHandler.contentBottom))
            context.strokePath()
        }

        // draw horizontal highlight lines
        if set.isHorizontalHighlightIndicatorEnabled
        {
            context.beginPath()
            context.move(to: CGPoint(x: viewPortHandler.contentLeft, y: point.y))
            context.addLine(to: CGPoint(x: viewPortHandler.contentRight, y: point.y))
            context.strokePath()
        }
    }