cp_two.swift

let axisSet = graph.axisSet as! CPTXYAxisSet
        
let axisTextStyle = CPTMutableTextStyle()
axisTextStyle.color = CPTColor.white()
axisTextStyle.fontName = "HelveticaNeue-Bold"
axisTextStyle.fontSize = 10.0
axisTextStyle.textAlignment = .center
let lineStyle = CPTMutableLineStyle()
lineStyle.lineColor = CPTColor.white()
lineStyle.lineWidth = 5
let gridLineStyle = CPTMutableLineStyle()
gridLineStyle.lineColor = CPTColor.gray()
gridLineStyle.lineWidth = 0.5


if let x = axisSet.xAxis {
    x.majorIntervalLength   = 20
    x.minorTicksPerInterval = 5
    x.labelTextStyle = axisTextStyle
    x.minorGridLineStyle = gridLineStyle
    x.axisLineStyle = lineStyle
    x.axisConstraints = CPTConstraints(lowerOffset: 0.0)
    x.delegate = self
}

if let y = axisSet.yAxis {
    y.majorIntervalLength   = 5
    y.minorTicksPerInterval = 5
    y.minorGridLineStyle = gridLineStyle
    y.labelTextStyle = axisTextStyle
    y.alternatingBandFills = [CPTFill(color: CPTColor.init(componentRed: 255, green: 255, blue: 255, alpha: 0.03)),CPTFill(color: CPTColor.black())]
    y.axisLineStyle = lineStyle
    y.axisConstraints = CPTConstraints(lowerOffset: 0.0)
    y.delegate = self
}