Swift Charts3.0 用法简析

Charts 功能强大，基本功能及属性如下：
本文主要讲解的是折线图：）

//添加Charts
        let lineChart = LineChartView()

        chartView.addSubview(lineChart)
        
        lineChart.snp.makeConstraints { (make) in
            make.edges.equalToSuperview().inset(UIEdgeInsetsMake(kDefault_bt_height + kDefault_20_pad + kDefault_lb_height, kDefault_24_pad, kDefault_lb_height, kDefault_24_pad))
        }
        
        let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
        let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0]
        
        setChart(months, values: unitsSold)

//设置charts方法
 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)
        }
        
        let lineChartDataSet = LineChartDataSet(values: dataEntries, label: "单位：万元")
        let lineChartData = LineChartData(dataSet: lineChartDataSet)
        
        lineChart.data = lineChartData
 //右下角图标描述
        lineChart.chartDescription?.text = "ChartView"
        
        //左下角图例
//        lineChart.legend.formSize = 30
//        lineChart.legend.form = .square
        lineChart.legend.textColor = kDefault_0x949494_clolr
        
        //设置X轴坐标
        lineChart.xAxis.valueFormatter = IndexAxisValueFormatter(values: dataPoints)
        lineChart.xAxis.granularity = 1.0
        lineChart.xAxis.labelPosition = .bottom
        lineChart.xAxis.drawGridLinesEnabled = false
        lineChart.xAxis.axisLineColor = kDefault_0x949494_clolr
        lineChart.xAxis.labelTextColor = kDefault_0x949494_clolr
        
        //设置Y轴坐标
//        lineChart.rightAxis.isEnabled = false
        //不显示右侧Y轴
        lineChart.rightAxis.drawAxisLineEnabled = false
        //不显示右侧Y轴数字
        lineChart.rightAxis.enabled = false
        lineChart.leftAxis.axisLineColor = kDefault_0x949494_clolr
        lineChart.leftAxis.gridColor = kDefault_0x949494_clolr
        lineChart.leftAxis.labelTextColor = kDefault_0x949494_clolr

        //设置双击坐标轴是否能缩放
        lineChart.scaleXEnabled = false
        lineChart.scaleYEnabled = false
        
//        lineChart.dragEnabled = true
//        lineChart.dragDecelerationEnabled = true
        
        //设置图表背景色和border
        //必须设置enable才能有效
//        lineChart.drawGridBackgroundEnabled = true
//        lineChart.drawBordersEnabled = true
//        lineChart.gridBackgroundColor = UIColor.red
//        lineChart.borderColor = UIColor.orange
//        lineChart.borderLineWidth = 5
        
        //设置折线线条
//        lineChartDataSet.fillColor = kDefault_0xff6600_clolr
//        lineChartDataSet.lineWidth = 4
        
        //外圆
        lineChartDataSet.setCircleColor(kDefault_0xff6600_4_clolr)
        //画外圆
//        lineChartDataSet.drawCirclesEnabled = true
        //内圆
        lineChartDataSet.circleHoleColor = kDefault_0xff6600_clolr
        //画内圆
//        lineChartDataSet.drawCircleHoleEnabled = true
        
        //线条显示样式
//        lineChartDataSet.lineDashLengths = [1,3,4,2]
//        lineChartDataSet.lineDashPhase = 0.5
        lineChartDataSet.colors = [kDefault_0xff872e_clolr]
        
        //线条上的文字
        lineChartDataSet.valueColors = [kDefault_0xff872e_clolr]
        //显示
//        lineChartDataSet.drawValuesEnabled = true
        
        //添加显示动画
        lineChart.animate(xAxisDuration: 1)
    }

下面是样式

Charts第一次使用就能发现它的强大和无可挑剔，完全可以实现自定义的基本样式。

-end