我在故事板中添加了bar chart,但我无法正确设置数据条目的标签。
这是我的代码:
var names = ["aaa", "bbb", "ccc", "ddd"]
var values = [230.0, 280.0, 450.0, 340.0]
setChart(dataPoints: names, values: values)
setChart函数:
func setChart(dataPoints: [String], values: [Double])
{
let formatter = BarChartFormatter()
formatter.setValues(values: dataPoints)
let xaxis:XAxis = XAxis()
barChartView.noDataText = "You need to provide data for the chart."
var dataEntries: [BarChartDataEntry] = []
for i in 0..<dataPoints.count
{
let dataEntry = BarChartDataEntry(x: Double(i), y: values[i])
dataEntries.append(dataEntry)
}
let chartDataSet = BarChartDataSet(values: dataEntries, label: "موجودی")
let chartData = BarChartData(dataSet: chartDataSet)
xaxis.valueFormatter = formatter
barChartView.xAxis.labelPosition = .bottom
barChartView.xAxis.drawGridLinesEnabled = false
barChartView.xAxis.valueFormatter = xaxis.valueFormatter
barChartView.chartDescription?.enabled = false
barChartView.legend.enabled = true
barChartView.rightAxis.enabled = false
barChartView.data = chartData
}
最后是格式化程序:
@objc(BarChartFormatter)
public class BarChartFormatter: NSObject, IAxisValueFormatter
{
var names = [String]()
public func stringForValue(_ value: Double, axis: AxisBase?) -> String
{
return names[Int(value)]
}
public func setValues(values: [String])
{
self.names = values
}
}
但是效果并不好,如下所示:
如此处所示,它添加了6个标签而不是4个标签,并且它还有重复项。
我已经阅读了this solution,但正如您所看到的,它还存在一些问题。
我该如何解决这个问题?
答案 0 :(得分:10)
我认为您可以尝试设置以下属性:
barChartView.xAxis.granularityEnabled = true
barChartView.xAxis.granularity = 1.0 //default granularity is 1.0, but it is better to be explicit
barChartView.xAxis.decimals = 0
源代码告诉您很多关于上述属性的信息。 https://github.com/danielgindi/Charts/blob/master/Source/Charts/Components/AxisBase.swift