更新 最新版本 语法已经改变 2017-3-31

我是前言: 大约几个月前我在简书写了一篇文章, 文中简单地介绍了Charts两种图表的样式的使用, 不过有种意犹未尽的感觉, 利用周末的空闲时间再次看了看, 有了新的收获, 今天发出来,分享给大家, 来稍加详细的再次走进Charts的世界. 完全纯代码.

说在前面的话： 这篇的篇幅确实是有些长, 不过你可以会一些图表的tips, 还能熟悉Swift语言的语法. #感觉不错请点个赞# 摸摸哒(冷漠脸.png), 如果还想看更多关于Swift和iOS开发相关的知识, 请关注我.

集成- Charts

1.1使用cocoa pods集成 你可能出现这样的问题

只能在iOS 9.3

// 解决
platform :ios, '8.0' // 你可能在Podfile中少加入了这句
use_frameworks!
pod 'Charts', '~> 2.2.5'

1.2 这篇文章的例子我是使用手动加入的framework进行测试的（iOS8.0之后）. 如果你不清楚如何加入三方框架请点击看看这篇文章http://www.jianshu.com/p/fd91c10c9f55

(注: 如果模拟器能运行, 真机不能运行, 一定看这篇)

这篇你可以看到下面这些

• LineChartView ----- 折线
• BarChartView ------ 柱状
• CandleStickChartView-----K线
• PieChartView -----饼状
• RadarChartView ----- 雷达

当然还有一些其他的你看不到0.-, 不过用法大同小异, 演示这几种相信其他的类型你也同样会使用了 下面进入代码演示.

折线图 - LineChartView

折线

// 创建-
func createLineChartView()
    {
        chartView = LineChartView.init(frame: CGRectMake(0, 64, s_w, s_h - 64))
        chartView.lineData
        // 签协议
        chartView.delegate = self
        chartView.backgroundColor = UIColor.whiteColor()
        self.view.addSubview(chartView)
    }

// 加上模拟数据
func setChart(dataPoints: [String], values: [Double]) {
        var dataEntries: [ChartDataEntry] = []
        for i in 0..<dataPoints.count {
            let dataEntry = ChartDataEntry(value: values[i], xIndex: i)
            dataEntries.append(dataEntry)
        }
        let chartDataSet = LineChartDataSet(yVals: dataEntries, label: "Units Sold")
        let chartData = LineChartData(xVals: months, dataSet: chartDataSet)
        // 加上一个界限, 演示图中红色的线
        let jx = ChartLimitLine(limit: 12.0, label: "I am LimitLine")
        chartView.rightAxis.addLimitLine(jx)
        chartView.data = chartData
        // 自定义颜色
        // colors 是一个数组, 可以给相应的颜色
        chartDataSet.colors = [UIColor.redColor()]
        chartDataSet.colors = ChartColorTemplates.colorful()
        chartView.animate(yAxisDuration: 1.0, easingOption: .EaseInBounce)
    }

柱状图- BarChartView

柱状

func createLineChartView()
    {
        chartView = BarChartView.init(frame: CGRectMake(0, 64, s_w, s_h - 64))
        chartView.barData
        // 签协议
        chartView.delegate = self
        chartView.backgroundColor = UIColor.whiteColor()
        self.view.addSubview(chartView)
    }

func setChart(dataPoints: [String], values: [Double]) {
        var dataEntries: [BarChartDataEntry] = []
        for i in 0..<dataPoints.count {
            let dataEntry = BarChartDataEntry(value: values[i], xIndex: i)
            dataEntries.append(dataEntry)
        }
        let chartDataSet = BarChartDataSet(yVals: dataEntries, label: "Units Sold")
        let chartData = BarChartData(xVals: months, dataSet: chartDataSet)
        // 加上一个界限, 演示图中红色的线
        let jx = ChartLimitLine(limit: 12.0, label: "I am LimitLine")
        chartView.rightAxis.addLimitLine(jx)
        chartView.data = chartData
        // 自定义颜色
        // 例子中有十二个柱状图
        // colors 是一个数组, 可以给相应的颜色
        chartDataSet.colors = [UIColor.blueColor(), UIColor.redColor(), UIColor.cyanColor(), UIColor.greenColor(), UIColor.brownColor(), UIColor.purpleColor()]
        // API 自带颜色模板
//        chartDataSet.colors = ChartColorTemplates.liberty()
        chartView.animate(yAxisDuration: 1.0, easingOption: .EaseInBounce)
    }

K线图- CandleStickChartView

K线

chartView = CandleStickChartView.init(frame: CGRectMake(0, 64, s_w, s_h - 64))
            // 签协议
            chartView.delegate = self
            chartView.backgroundColor = UIColor.whiteColor()
            // 画板颜色
            chartView.gridBackgroundColor = UIColor.clearColor()
            //
            chartView.borderColor = UIColor.whiteColor()
            self.view.addSubview(chartView)
            // 横轴数据
            var xValues = [String]()
            for i in 0...25 {
                xValues.append(NSString(format: "%d", i + 1993) as String)
            }
            // 初始化CandleChartDataEntry数组
            var yValues = [CandleChartDataEntry]()
            // 产生20个随机立柱数据
            for j in 0...24 {
                let val = (Double)(arc4random_uniform(40))
                let high = (Double)(arc4random_uniform(9)) + 8.0
                let low = (Double)(arc4random_uniform(9)) + 8.0
                let open = (Double)(arc4random_uniform(6)) + 1.0
                let close = (Double)(arc4random_uniform(6)) + 1.0
                
                let even = j % 2 == 0
                
                yValues.append(CandleChartDataEntry.init(xIndex: j, shadowH: val + high, shadowL: val - low, open: even ? val + open : val - open, close: even ? val - close : val + close))
            }
            let set1 = CandleChartDataSet.init(yVals: yValues, label: "data set")
            // defult left
            // set1.axisDependency
            // data set color
            set1.setColor(UIColor.blueColor())
            set1.shadowColor = UIColor ( red: 0.5536, green: 0.5528, blue: 0.0016, alpha: 1.0 )
            // 立线的宽度
            set1.shadowWidth = 0.7
            // close >= open
            set1.decreasingColor = UIColor.redColor()
            // 内部是否充满颜色
            set1.decreasingFilled = true
            // open > close
            set1.increasingColor = UIColor ( red: 0.0006, green: 0.2288, blue: 0.001, alpha: 1.0 )
            // 内部是否充满颜色
            set1.increasingFilled = true
            // 赋值数据
            let data = CandleChartData(xVals: xValues, dataSet: set1)
            chartView.data = data

饼状图- PieChartView

饼状

pieChartView = PieChartView.init(frame: CGRectMake(0, 0, s_w, s_h))
        pieChartView.delegate = self;
        // 可以调整大小, 位置
//        pieChartView.setExtraOffsets(left: 20.0, top: 0.0, right: 20.0, bottom: 0.0)
        self.view.addSubview(pieChartView)
        var yValues = [BarChartDataEntry]()
        // 最好从0 开始. 否则第一个将失去点击效果, 并出现bug...
        for i in 0...5 {
            // 占比数据
            yValues.append(BarChartDataEntry.init(value: (Double)(arc4random_uniform(5)) + 2.0, xIndex: i))
            
        }
        var xValues = [String]()
        for j in 0...5 {
            // 描述文字
            xValues.append(NSString(format: "%d\\\\("夏天然后")", j + 5) as String)
        }
        //
        let dataSet: PieChartDataSet = PieChartDataSet.init(yVals: yValues, label: "data Set");
        // 空隙
        dataSet.sliceSpace = 5.0
        var colors = [UIColor]()
        colors.append(UIColor ( red: 0.8185, green: 0.8172, blue: 0.0023, alpha: 1.0 ))
        colors.append(UIColor ( red: 0.0, green: 0.81, blue: 0.81, alpha: 1.0 ))
        colors.append(UIColor.greenColor())
        colors.append(UIColor.grayColor())
        colors.append(UIColor.purpleColor())
        colors.append(UIColor.blueColor())
        dataSet.colors = colors
        // 如果你需要指示文字在外部标注百分比, 你需要这样.
        dataSet.valueLinePart1OffsetPercentage = 0.8;
        dataSet.valueLinePart1Length = 0.2;
        dataSet.valueLinePart2Length = 0.4;
        dataSet.yValuePosition = .OutsideSlice
        let data = PieChartData(xVals: xValues, dataSet: dataSet)
        let formatter = NSNumberFormatter.init()
        formatter.maximumFractionDigits = 1
        formatter.numberStyle = NSNumberFormatterStyle.PercentStyle
        formatter.multiplier = 1.0
        formatter.percentSymbol = " %"
        data.setValueFormatter(formatter)
        data.setValueTextColor(UIColor.blackColor())
        pieChartView.data = data

雷达图- RadarChartView

雷达

radarBarChartView = RadarChartView.init(frame: CGRectMake(0, 0, s_w, s_h))
        // 描述文字
        radarBarChartView.descriptionText = "I am destext"
        // 指向定点线的宽度
        radarBarChartView.webLineWidth = 2.0
        radarBarChartView.innerWebColor = UIColor.blackColor()
        radarBarChartView.innerWebLineWidth = 0.75
        radarBarChartView.webAlpha = 1.0
        self.view.backgroundColor = UIColor.whiteColor()
        self.view.addSubview(radarBarChartView)
        
        
        var yValues1 = [ChartDataEntry]()
        var yValues2 = [ChartDataEntry]()
        var xValues = [String]()
        for i in 0...8 {
            //
            yValues1.append(ChartDataEntry(value: (Double)(arc4random_uniform(5)), xIndex: i))
            yValues2.append(ChartDataEntry(value: (Double)(arc4random_uniform(5)), xIndex: i))
            //
            xValues.append(NSString(format: "%d\\\\("夏天然后")", i + 5) as String)
        }
        let dataSet = RadarChartDataSet.init(yVals: yValues1, label: "data Set")
        dataSet.drawFilledEnabled = true
        dataSet.setColor(UIColor ( red: 0.7913, green: 0.9949, blue: 0.4941, alpha: 1.0 ))
        dataSet.fillColor = UIColor ( red: 0.7913, green: 0.9949, blue: 0.4941, alpha: 1.0 )
        dataSet.lineWidth = 1.0
        
        let dataSet1 = RadarChartDataSet.init(yVals: yValues2, label: "data Set2")
        dataSet1.drawFilledEnabled = true
        dataSet1.setColor(UIColor ( red: 0.4702, green: 1.0, blue: 0.9962, alpha: 1.0 ))
        dataSet1.fillColor = UIColor ( red: 0.4702, green: 1.0, blue: 0.9962, alpha: 1.0 )
        dataSet1.lineWidth = 1.5
        
        let data = RadarChartData.init(xVals: xValues, dataSets: [dataSet, dataSet1])
        radarBarChartView.data = data

相对图表进行操作, 例如点击 请使用ChartViewDelegate

optional public func chartValueSelected(chartView: Charts.ChartViewBase, entry: Charts.ChartDataEntry, dataSetIndex: Int, highlight: Charts.ChartHighlight)
optional public func chartValueNothingSelected(chartView: Charts.ChartViewBase)
optional public func chartScaled(chartView: Charts.ChartViewBase, scaleX: CGFloat, scaleY: CGFloat)
optional public func chartTranslated(chartView: Charts.ChartViewBase, dX: CGFloat, dY: CGFloat)

毕竟是将近10000Star的库, 介绍的有限, 如果你还感兴趣, 请仔细阅读API吧.

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