如何使用danift gindi /图表库在swift中显示百分比符号饼图（IOS图表） [英] How to show Percentage sign in pie chart using daniel gindi/Chart library in swift(IOS Chart)

问题描述

我使用的是Charts框架（Daniel gindi）。它工作正常，但
如何在饼图上显示％（符号）？

我也尝试使用NSNumberFormatter（）方法获取percantage中的隐蔽数据值，但不能获得％sign。

我在这里上传代码

  @IBOutlet var pieChart：PieChartView！ 
覆盖func viewDidLoad（）{
 super.viewDidLoad（）
 var data = [25.0,37.5,12.5,12.5,12.5] //饼图数据
 var status = [ A，B，C，D，E] //状态
 setChart（状态，值：数据）
 self.pieChart.drawSliceTextEnabled = false 
 
} 
 func setChart（dataPoints：[String]，values：[Double]）{
 
 pieChart.noDataText =你需要为图表提供数据
 pieChart.noDataTextDescription =
 self.pieChart.descriptionText =
 
 var dataEntries：[ChartDataEntry] = [] 
 //pieChart.centerText =
 for i in 0 ..< dataPoints.count {
 
 let dataEntry = ChartDataEntry（value：values [i]，xIndex：i）
 dataEntries.append（dataEntry）
 
} 
 
 let pieChartDataSet = PieChartDataSet（yVals：dataEntries，label： ）
 
 var colors：[UIColor] = [] 
 
 
 for _ in 0 ..< dataPoints.count {
 let red = Double（arc4random_uniform（256））
 let green = Double（arc4random_uniform（256））
 let blue = Double（arc4random_uniform（256））
 
 let color = UIColor（red： CGFloat（红色/ 255），绿色：CGFloat（绿色/ 255），蓝色：CGFloat（蓝色/ 255），alpha：1）
 colors.append（颜色）
 
 pieChartDataSet.colors = colors 
 
} 
 
 let pieChartData = PieChartData（xVals：dataPoints，dataSet：pieChartDataSet）
 
 pieChart.data = pieChartData 
 pieChart .animate（yAxisDuration：2.0，easingOption：.EaseInOutBack）
} 
  

---

输出：=>

解决方案

在pieChart上显示％符号。

来源 https://github.com/danielgindi/Charts

编写一个快乐的代码。

I am using the Charts framework (by Daniel gindi). It was working fine but how to show % (sign) on piechart?
I am also try use NSNumberFormatter() method for covert data value in percantage but not get % sign.
I am upload code here

    @IBOutlet var pieChart: PieChartView!
    override func viewDidLoad() {
            super.viewDidLoad()
            var data = [25.0,37.5,12.5,12.5,12.5] // pie chart data 
            var status = ["A","B","C","D","E"] // status
            setChart(status, values: data)
            self.pieChart.drawSliceTextEnabled = false

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

            pieChart.noDataText = "you need to provide data for chart"
            pieChart.noDataTextDescription = ""
            self.pieChart.descriptionText = ""

            var dataEntries: [ChartDataEntry] = []
            //pieChart.centerText = " "
            for i in 0..<dataPoints.count {

                let dataEntry = ChartDataEntry(value: values[i], xIndex: i)
                dataEntries.append(dataEntry)

            }

            let pieChartDataSet = PieChartDataSet(yVals: dataEntries, label: "")

            var colors: [UIColor] = []


            for _ in 0..<dataPoints.count {
                let red = Double(arc4random_uniform(256))
                let green = Double(arc4random_uniform(256))
                let blue = Double(arc4random_uniform(256))

                let color = UIColor(red: CGFloat(red/255), green: CGFloat(green/255), blue: CGFloat(blue/255), alpha: 1)
                colors.append(color)

                pieChartDataSet.colors = colors

            }

            let pieChartData = PieChartData(xVals: dataPoints, dataSet: pieChartDataSet)

            pieChart.data = pieChartData
            pieChart.animate(yAxisDuration: 2.0, easingOption: .EaseInOutBack)
}

---

Output:=>

解决方案

To show % sign on pieChart.

Download Example Project

Just use this below code.

let formatter = NSNumberFormatter()
formatter.numberStyle = .PercentStyle
formatter.maximumFractionDigits = 1
formatter.multiplier = 1.0
pieChartData.dataSet?.valueFormatter = formatter

You will get % sign after your value display on slice.

Source https://github.com/danielgindi/Charts

Have a happy coding.

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