如何缩小 CPTXYGraph 和 CPTGraphHostingView 之间的差距？

Question

我在图形 CPTXYGraph 中创建了一个散点图，然后将此图形传递给 CPTGraphHostingView，代码如下：

func makeGraphHostingView() -> CPTGraphHostingView {
    let hostingView = CPTGraphHostingView()

    let graph = CPTXYGraph()
    graph.axisSet!.isHidden = true
    graph.plotAreaFrame!.paddingTop = 0.0
    graph.plotAreaFrame!.paddingRight = 0.0
    graph.plotAreaFrame!.paddingBottom = 0.0
    graph.plotAreaFrame!.paddingLeft = 0.0

    hostingView.hostedGraph = graph

    let lineStyle = CPTMutableLineStyle()
    lineStyle.lineColor = CPTColor.white()
    lineStyle.lineWidth = 3.0

    let xAxisMin = 0.0
    let xAxisMax = 100.0
    let yAxisMin = 0.0
    let yAxisMax = 100.0

    let plotSpace = graph.defaultPlotSpace as! CPTXYPlotSpace
    plotSpace.xRange = CPTPlotRange(locationDecimal: Decimal(xAxisMin), lengthDecimal: Decimal(xAxisMax - xAxisMin))
    plotSpace.yRange = CPTPlotRange(locationDecimal: Decimal(yAxisMin), lengthDecimal: Decimal(yAxisMax - yAxisMin))

    let plot = CPTScatterPlot()
    plot.dataSource = self
    plot.dataLineStyle = lineStyle

    let areaFillColor = UIColor.white.withAlphaComponent(0.05)
    let fill = CPTFill(color: CPTColor(cgColor: areaFillColor.cgColor))
    plot.areaFill = fill
    plot.areaBaseValue = NSNumber(0.0)

    graph.add(plot)

    return hostingView
}

hostingView 固定到 superview 的前导、尾随、顶部和底部锚点，常数为 0.0（观看图片 1）：

我希望将图形调整到与 hostingView 相同的范围，但我不知道该怎么做，图形填充在这里对我没有任何帮助。有什么想法吗？

Answer 1

您需要将 graph 上的填充设置为。

graph.paddingTop = 0.0
graph.paddingRight = 0.0
graph.paddingBottom = 0.0
graph.paddingLeft = 0.0

如何缩小 CPTXYGraph 和 CPTGraphHostingView 之间的差距？

How to reduce gap between CPTXYGraph and CPTGraphHostingView?

xcode

core-animation

core-plot

ios

swift