Question

我正在尝试使用iOS图表库启用网格线，以最终实现类似这样的

到目前为止我的代码

func setChart（dataPoints：[String]，values：[Double]）{

    var dataEntries: [ChartDataEntry] = []

    let yAxis = lineChartView.getAxis(.Left)
    let yAxisRight = lineChartView.getAxis(.Right)

    let xAxis = lineChartView.xAxis

    lineChartView.drawBordersEnabled = true

    xAxis.spaceBetweenLabels = 1
    xAxis.drawGridLinesEnabled = true
    xAxis.gridLineWidth = 0.25

    yAxisRight.enabled = false
    yAxis.drawGridLinesEnabled = true
    yAxis.axisMaxValue = 4.0
    yAxis.axisMinValue = 1.0
    yAxis.inverted = true
    yAxis.setLabelCount(4, force: true)
    yAxis.axisLineColor = UIColor.whiteColor()

    var dataEntry = ChartDataEntry(value: 1.0, xIndex: 0)
    dataEntries.append(dataEntry)
    dataEntry = ChartDataEntry(value: 1.0, xIndex: 1)
    dataEntries.append(dataEntry)
    dataEntry = ChartDataEntry(value: 2.0, xIndex: 1)
    dataEntries.append(dataEntry)
    dataEntry = ChartDataEntry(value: 2.0, xIndex: 2)
    dataEntries.append(dataEntry)

    let lineChartDataSet = LineChartDataSet(yVals: dataEntries, label: "Units Sold")
    let lineChartData = LineChartData(xVals: dataPoints, dataSet: lineChartDataSet)
    lineChartView.data = lineChartData

}

//我的结果

result

网格线似乎没有绘制。非常感谢任何见解。

Answer 1

您的网格线可能太薄 - 在分辨率较低的设备上，可能导致根本不显示线条。

iPhone 6或6 plus将显示0.25像素的线......但早期的设备不会。

iOS图表：网格线绘图问题

1 个答案: