如何使用带Swift 3.0的danielgindi/Charts库绘制条形图

问题陈述：无法运行，因为在swift 3.0语法错误中使用“danielgindi/Charts library”实现条形图时出现了一些错误

Swift 3.0中的实际错误：

import Charts

class ChartViewController: UIViewController {

    @IBOutlet var barChartView: BarChartView!

    var months: [String]!
    var dataEntries: [BarChartDataEntry] = []


    override func viewDidLoad() {
        super.viewDidLoad()

        months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
        let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 18.0, 2.0, 4.0, 5.0, 4.0]
        setChart(dataPoints: months, values: unitsSold)

    }

    func setChart(dataPoints: [String], values: [Double]) {
        barChartView.noDataText = "You need to provide data for the chart."

        for i in 0..<dataPoints.count {
            let dataEntry = BarChartDataEntry(x: Double(i), yValues: [values[i]])
            dataEntries.append(dataEntry)
        }

        let chartDataSet = BarChartDataSet(values: dataEntries, label: "Units Sold")

        let chartData = BarChartData(xVals: months, dataSet: chartDataSet)

        barChartView.data = chartData
    }

更正上述错误后，它在下一行中给出另一个错误，如下所示

编码内容：

import Charts

class ChartViewController: UIViewController {

    @IBOutlet var barChartView: BarChartView!

    var months: [String]!
    var dataEntries: [BarChartDataEntry] = []


    override func viewDidLoad() {
        super.viewDidLoad()

        months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
        let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 18.0, 2.0, 4.0, 5.0, 4.0]
        setChart(dataPoints: months, values: unitsSold)

    }

    func setChart(dataPoints: [String], values: [Double]) {
        barChartView.noDataText = "You need to provide data for the chart."

        for i in 0..<dataPoints.count {
            let dataEntry = BarChartDataEntry(x: Double(i), yValues: [values[i]])
            dataEntries.append(dataEntry)
        }

        let chartDataSet = BarChartDataSet(values: dataEntries, label: "Units Sold")

        let chartData = BarChartData(xVals: months, dataSet: chartDataSet)

        barChartView.data = chartData
    }

导入图表
类ChartViewController:UIViewController{
@IBVAR barChartView：barChartView！
变量月份：[字符串]！
var数据项：[BarChartDataEntry]=[]
重写func viewDidLoad（）{
super.viewDidLoad（）
月份=[“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”]
让unitsSold=[20.0,4.0,6.0,3.0,12.0,16.0,4.0,18.0,2.0,4.0,5.0,4.0]
设置图（数据点：月，值：单位）
}
func集合图表（数据点：[字符串]，值：[双精度]）{
barChartView.NodeataText=“您需要为图表提供数据。”
对于0..中的i，您可以将月份和单位销售值迭代为xVal和yVal

  var barChartValues: [BarChartDataEntry] = []

    for (key,val) in self.barChartDataval.enumerated() {

        let xVal = Double(key)
        let yVal = Double(val.cost)
        let dataEntry = BarChartDataEntry(x: xVal, y: yVal!)
        barChartValues.append(dataEntry)

    }

    let chartDataSet = BarChartDataSet(values: barChartValues, label: "Expenses Summary")
    chartDataSet.colors = [Constants.k_COLORS.BLUE]
    var dataSets = [IChartDataSet]()
    dataSets.append(chartDataSet)

    let chartData = BarChartData(dataSets: dataSets)
    self.barChartView.data = chartData
    self.barChartView.chartDescription?.text = ""

    self.barChartView.animate(xAxisDuration: 2.0, yAxisDuration: 2.0, easingOption: .easeInBounce)

我也遇到过这个问题。这里是这样的：

let dataEntry = BarChartDataEntry(x: Double(i), yValues: [values[i]])

无法将数据点：[String]转换为类型Double

我的解决方案是删除Double。然后这不满足我的数据类型，所以我将它们都设置为[Int]类型，如下所示：

func setChart(dataPoints: [Int], values: [Int]) {

    self.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: Double(values[i]) )
        dataEntries.append(dataEntry)


    }

    let chartDataSet = BarChartDataSet(values: dataEntries, label: "Units Sold")
    let chartData = BarChartData(dataSet: chartDataSet)
    self.data = chartData

对于折线图，我们可以看到以下内容

import UIKit
import Charts

class LineChartVC: UIViewController , ChartViewDelegate{
    @IBOutlet var lineChartView: LineChartView!

    var months: [String]!


    override func viewDidLoad() {
        super.viewDidLoad()
        self.lineChartSetUp()

    }

}

    extension LineChartVC{


        func  lineChartSetUp(){

            self.lineChartView.delegate = self
            self.lineChartView.chartDescription?.enabled = false//true

            self.lineChartView.dragEnabled = true
            self.lineChartView.setScaleEnabled(true)
            self.lineChartView.pinchZoomEnabled = true
            self.lineChartView.drawGridBackgroundEnabled = false


            // x-axis limit line
            /*
             let llXAxis = ChartLimitLine(limit: 10.0, label: "Index 10")
             llXAxis.lineWidth = 4.0
             llXAxis.lineDashLengths = [(10.0), (10.0), (0.0)]
             llXAxis.labelPosition = ChartLimitLine.LabelPosition.rightBottom//ChartLimitLabelPositionRightBottom
             llXAxis.valueFont = UIFont.systemFont(ofSize: 10.0)
             //[_chartView.xAxis addLimitLine:llXAxis];

             self.lineChartView.xAxis.gridLineDashLengths = [10.0, 10.0]
             self.lineChartView.xAxis.gridLineDashPhase = 0.0


             let ll1 = ChartLimitLine(limit: 150.0, label: "Upper Limit")
             ll1.lineWidth = 4.0
             ll1.lineDashLengths = [5.0, 5.0]
             ll1.labelPosition = ChartLimitLine.LabelPosition.rightTop //ChartLimitLabelPositionRightTop
             ll1.valueFont = UIFont.systemFont(ofSize: 10.0)

             let ll2 = ChartLimitLine(limit: -30.0, label: "Lower Limit")
             ll2.lineWidth = 4.0
             ll2.lineDashLengths = [5.0, 5.0]
             ll2.labelPosition = ChartLimitLine.LabelPosition.rightBottom//ChartLimitLabelPositionRightBottom
             ll2.valueFont = UIFont.systemFont(ofSize: 10.0)

             let leftAxis: YAxis? =  self.lineChartView.leftAxis
             leftAxis?.removeAllLimitLines()

             //         leftAxis?.addLimitLine(ll1)
             //         leftAxis?.addLimitLine(ll2)
             //         leftAxis?.axisMaximum = 200.0
             //         leftAxis?.axisMinimum = -50.0

             //        leftAxis?.axisMaximum = 100.0
             //        leftAxis?.axisMinimum = 0.0
             //
             leftAxis?.gridLineDashLengths = [5.0, 5.0]
             leftAxis?.drawZeroLineEnabled = false
             leftAxis?.drawLimitLinesBehindDataEnabled = true

             self.lineChartView.rightAxis.enabled = false
             //[_chartView.viewPortHandler setMaximumScaleY: 2.f];
             //[_chartView.viewPortHandler setMaximumScaleX: 2.f];
             */
            let marker = BalloonMarker(color: UIColor(white: 180 / 255.0, alpha: 1.0), font: UIFont.systemFont(ofSize: 12.0), textColor: UIColor.white, insets: UIEdgeInsetsMake(8.0, 8.0, 20.0, 8.0))
            marker.chartView = self.lineChartView
            marker.minimumSize = CGSize(width: 80.0, height: 40.0)
            self.lineChartView.marker = marker
            self.lineChartView.legend.form = Legend.Form(rawValue: 5)!

            months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"]
            let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0, 4.0, 18.0, 2.0, 4.0, 5.0, 4.0]

            self.setChart(months, values: unitsSold)

        }



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

            var dataEntries: [ChartDataEntry] = []

            for i in 0..<dataPoints.count {

                let dataEntry = ChartDataEntry(x:Double(i) , y: values[i])
                dataEntries.append(dataEntry)

            }
            print(dataEntries )

            let data = LineChartData()
            let ds1 = LineChartDataSet(values: dataEntries, label: "Units Sold")
            ds1.colors = [UIColor.red]
            data.addDataSet(ds1)
            self.lineChartView.data = data



        }


        func chartValueSelected(chartView: ChartViewBase, entry: ChartDataEntry, dataSetIndex: Int, highlight: Highlight) {
            //        print("\(entry.value) in \(months[dataSetIndex])")
            print(entry )
        }




    }

导入UIKit
进口图表
类LineChartVC:UIViewController、ChartViewDelegate{
@IBVAR lineChartView：lineChartView！
变量月份：[字符串]！
重写func viewDidLoad（）{
super.viewDidLoad（）
self.lineChartSetUp（）
}
}
延长线图表{
func lineChartSetUp（）{
self.lineChartView.delegate=self
self.lineChartView.chartDescription？.enabled=false//true
self.lineChartView.dragEnabled=true
self.lineChartView.setScaleEnabled（真）
self.lineChartView.pinchZoomEnabled=true
self.lineChartView.drawGridBackgroundEnabled=false
//x轴极限线
/*
设llXAxis=ChartLimitLine（限制：10.0，标签：“索引10”）
llXAxis.lineWidth=4.0
llXAxis.lineDashLength=[（10.0）、（10.0）、（0.0）]
llXAxis.labelPosition=ChartLimitLine.labelPosition.rightBottom//ChartLimitLabelPositionRightBottom
llXAxis.valueFont=UIFont.systemFont（大小：10.0）
//[_chartView.xAxis addLimitLine:llXAxis]；
self.lineChartView.xAxis.GridlineDashLength=[10.0,10.0]
self.lineChartView.xAxis.gridLineDashPhase=0.0
设ll1=ChartLimitLine（限值：150.0，标签：“上限”）
ll1.0线宽=4.0
ll1.LineDashLength=[5.0,5.0]
ll1.labelPosition=ChartLimitLine.labelPosition.rightTop//ChartLimitLabelPositionRightTop
ll1.valueFont=UIFont.systemFont（大小：10.0）
设ll2=ChartLimitLine（限值：-30.0，标签：“下限”）
ll2.0线宽=4.0
ll2.LineDashLength=[5.0,5.0]
ll2.labelPosition=ChartLimitLine.labelPosition.rightBottom//ChartLimitLabelPositionRightBottom
ll2.valueFont=UIFont.systemFont（大小：10.0）
让leftAxis:YAxis？=self.lineChartView.leftAxis
leftAxis？.removeAllLimitLines（）
//leftAxis？.addLimitLine（ll1）
//leftAxis？.addLimitLine（ll2）
//leftAxis？.axisMaximum=200.0
//leftAxis？.Axis最小值=-50.0
//leftAxis？.axisMaximum=100.0
//leftAxis？.Axis最小值=0.0
//
leftAxis？.GridlineDashLength=[5.0,5.0]
leftAxis？.drawZeroLineEnabled=false
leftAxis？.drawLimitLinesBehindDataEnabled=true
self.lineChartView.rightAxis.enabled=false
//[_chartView.viewPortHandler setMaximumScaleY:2.f]；
//[_chartView.viewPortHandler setMaximumScaleX:2.f]；
*/
let marker=BallookMarker（颜色：UIColor（白色：180/255.0，alpha:1.0），字体：UIFont.systemFont（字体大小：12.0），文本颜色：UIColor.white，插图：UIEdgeInsetsMake（8.0,8.0,20.0,8.0））
marker.chartView=self.lineChartView
marker.minimumSize=CGSize（宽度：80.0，高度：40.0）
self.lineChartView.marker=标记
self.lineChartView.legend.form=legend.form（原始值：5）！
月份=[“一月”、“二月”、“三月”、“四月”、“五月”、“六月”、“七月”、“八月”、“九月”、“十月”、“十一月”、“十二月”]
让unitsSold=[20.0,4.0,6.0,3.0,12.0,16.0,4.0,18.0,2.0,4.0,5.0,4.0]
self.setChart（月，值：unitsSold）
}
func集合图表（u数据点：[String]，值：[Double]）{
变量数据项：[ChartDataEntry]=[]
对于0中的i..
导入UIKit
进口图表
类ViewController:UIViewController、ChartViewDelegate{
@IBVAR barChartView：barChartView！
弱var axisFormatDelegate:IAxisValueFormatter？
变量月份：[字符串]！
var unitsSold=[Double]（）
重写func viewDidLoad（）{
super.viewDidLoad（）
barChartView.delegate=self
axisFormatDelegate=self
月份=[“周一”、“周二”、“周三”、“周四”、“周五”、“周六”、“周日”]
unitsSold=[20.0,54.0,6.0,30.0,92.0,16.0114.0]
设置图（数据点：月，值：单位）
} 
func集合图表（数据点：[字符串]，值：[双精度]）{
barChartView.NodeataText=“您需要为图表提供数据。”
//防止在图表中设置空数据集（崩溃）
guard dataPoints.count>0 else{return}
var dataEntries=[BarChartDataEntries]（）
import UIKit
import Charts

class ViewController: UIViewController, ChartViewDelegate {

    @IBOutlet weak var barChartView: BarChartView!
    weak var axisFormatDelegate: IAxisValueFormatter?

    var months: [String]!
    var unitsSold = [Double]()

 override func viewDidLoad() {
            super.viewDidLoad()

            barChartView.delegate = self
            axisFormatDelegate = self
            months  = ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]
            unitsSold  = [20.0, 54.0, 6.0, 30.0, 92.0, 16.0,114.0]
            setChart(dataPoints: months, values: unitsSold)
        } 
             func setChart(dataPoints: [String], values: [Double]) {

                barChartView.noDataText = "You need to provide data for the chart."

                // Prevent from setting an empty data set to the chart (crashes)
                guard dataPoints.count > 0 else { return }

                var dataEntries = [BarChartDataEntry]()

                for i in 0..<dataPoints.count {
                    let entry = BarChartDataEntry(x: Double(i), y: values[i], data: months as AnyObject?)
                    dataEntries.append(entry)
                }

                let chartDataSet = BarChartDataSet(entries: dataEntries, label: "Units Sold")
                chartDataSet.drawValuesEnabled = false
                chartDataSet.colors = [UIColor.red]
                chartDataSet.colors = [UIColor.lightGray]
                chartDataSet.highlightColor = UIColor.orange.withAlphaComponent(0.3)
                chartDataSet.highlightAlpha = 1
                let chartData = BarChartData(dataSet: chartDataSet)
                barChartView.data = chartData
                let xAxisValue = barChartView.xAxis
                xAxisValue.valueFormatter = axisFormatDelegate

                //   chartDataSet.colors = ChartColorTemplates.colorful()    //multiple colors

                //Animation bars
                barChartView.animate(xAxisDuration: 0.0, yAxisDuration: 1.0, easingOption: .easeInCubic)

                // X axis configurations
                barChartView.xAxis.granularityEnabled = true
                barChartView.xAxis.granularity = 1
                barChartView.xAxis.drawAxisLineEnabled = true
                barChartView.xAxis.drawGridLinesEnabled = false
                barChartView.xAxis.labelFont = UIFont.systemFont(ofSize: 15.0)
                barChartView.xAxis.labelTextColor = UIColor.black
                barChartView.xAxis.labelPosition = .bottom

                // Right axis configurations
                barChartView.rightAxis.drawAxisLineEnabled = false
                barChartView.rightAxis.drawGridLinesEnabled = false
                barChartView.rightAxis.drawLabelsEnabled = false

                // Other configurations
                barChartView.highlightPerDragEnabled = false
                barChartView.chartDescription?.text = ""
                barChartView.legend.enabled = false
                barChartView.pinchZoomEnabled = false
                barChartView.doubleTapToZoomEnabled = false
                barChartView.scaleYEnabled = false

                barChartView.drawMarkers = true

                let l = barChartView.legend
                l.horizontalAlignment = .left
                l.verticalAlignment = .bottom
                l.orientation = .horizontal
                l.drawInside = false
                l.form = .circle
                l.formSize = 9
                l.font = UIFont(name: "HelveticaNeue-Light", size: 11)!
                l.xEntrySpace = 4

                // On tapped bar marker before adding BalloonMarker.swift
                let marker =  BalloonMarker(color: UIColor.orange, font: UIFont.boldSystemFont(ofSize: 13), textColor: UIColor.white, insets: UIEdgeInsets(top: 7.0, left: 7.0, bottom: 15.0, right: 7.0))
                marker.chartView = barChartView
                barChartView.marker = marker
            }
}
    extension ViewController: IAxisValueFormatter {

        func stringForValue(_ value: Double, axis: AxisBase?) -> String {
            return months[Int(value)]
        }
    }