Question

我在swift 3.0 xcodeproject中使用iOS Charts.framework（https://github.com/danielgindi/Charts）。

我知道“所有数据集构造函数都已更改 - 它们不再采用x-indices数组”但如果LineChartData不再具有“xVals”参数，如何在x轴上放置字符串？？之前很容易做到......

let weights: [Double] = self.getWeigths()
let weightDates: [String] = self.getWeightDates()

var yValues : [ChartDataEntry] = [ChartDataEntry]()
    for i in 0 ..< dateLastWeights.count {
        let entry = ChartDataEntry(x: Double(i), y: weights[i])
        yValues.append(entry)
    }
let set: LineChartDataSet = LineChartDataSet(values: yValues, label: "First Set")
var dataSets : [LineChartDataSet] = [LineChartDataSet]()
dataSets.append(set)

let data: LineChartData = LineChartData(xVals: weightDates, dataSets: dataSets)

Answer 1

在尝试了很多事情并与其他开发人员讨论之后我们就成功了！

self.lineChart.xAxis.granularity = 1
self.lineChart.xAxis.valueFormatter = DefaultAxisValueFormatter(block: { (index, _) -> String in
        return self.dateLastWeights[Int(index)]
    })

Answer 2

从3.0.1版开始，你也可以这样做：

lineChart.xAxis.valueFormatter = IndexAxisValueFormatter(values: labels)
lineChart.xAxis.granularity = 1.0

LineChartData在构造函数Charts Swift 3上没有x值

2 个答案: