ihealth_ios/Inhealth/IHLineChartModel.swift

//
//  IHLineChartModel.swift
//  Inhealth
//
//  Created by weclouds on 2019/12/16.
//  Copyright © 2019 weclouds. All rights reserved.
//

import UIKit
import Charts

struct LineChartRawData {
    var yData:[Double]!
    init(yData:[Double]) {
        self.yData = yData
    }
}
struct YRawData {
    var yData:[Double]
    
}

struct LineChartRawDataWithLabel {
    var data:LineChartRawData
}

class IHLineChartModel: NSObject {
     static var share = IHLineChartModel()
    
      fileprivate  func getLineDataSet(_ rawData:LineChartRawData) -> LineChartDataSet? {
            var yChartVals = [ChartDataEntry]()
            for (index, val) in rawData.yData.enumerated() {
                yChartVals.append(ChartDataEntry(x: Double(index), y: val))
            }
            
            var lineDataSet:LineChartDataSet? = nil
             lineDataSet = LineChartDataSet(entries: yChartVals)
            configDataSet(lineDataSet!)
          
            lineDataSet?.setColor(UIColor(hexString: "#573F95")!)
            lineDataSet?.circleColors = [.clear]
            return lineDataSet
        }
        
        
       fileprivate func configDataSet(_ lineDataSet :LineChartDataSet)  {
            lineDataSet.drawIconsEnabled = false
            lineDataSet.lineWidth = 1.5
            lineDataSet.circleRadius = 3
            lineDataSet.drawCircleHoleEnabled = true
            lineDataSet.circleHoleRadius = 1.5
            lineDataSet.circleHoleColor = .clear
            lineDataSet.valueFont = .systemFont(ofSize: 9)
            lineDataSet.formLineDashLengths = [5, 2.5]
            lineDataSet.formLineWidth = 1.5
            lineDataSet.formSize = 15
            lineDataSet.resetCircleColors(0) //删除第一个点
            lineDataSet.drawValuesEnabled = false
            lineDataSet.drawFilledEnabled = false
            lineDataSet.mode = .cubicBezier
        
        
            lineDataSet.highlightEnabled = true  //不启用十字线
            lineDataSet.highlightColor = UIColor.clear
    //    lineDataSet.highlightLineWidth = 2
            let valueFormatter = NumberFormatter()
            valueFormatter.numberStyle = .decimal
            valueFormatter.maximumFractionDigits = 3
            lineDataSet.drawFilledEnabled = false
        }
      fileprivate  func gLineChartSetData(_ chartView:LineChartView, xVals:[String], rawDatas:[LineChartRawDataWithLabel]) {
            
            var dataSets = [LineChartDataSet]()
            for i in 0..<rawDatas.count  {
                let rawData = rawDatas[i]
                let set = getLineDataSet(rawData.data)
                 if let set = set {
                     dataSets.append(set)
                 }
            }

            let data = LineChartData(dataSets: dataSets)
           
            chartView.data = data
            
            chartView.xAxis.valueFormatter = IndexAxisValueFormatter(values: xVals)
        
          // let marker = BalloonMarker(color: .clear,
//                                        font: .systemFont(ofSize: 12),
//                                        textColor: .black,
//                                        insets: UIEdgeInsets(top: 8, left: 8, bottom: 20, right: 8))
         let marker = XYMarkerView(color: UIColor(hexString: "#573F95")!, font: .systemFont(ofSize: 12), textColor: .white, insets: UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5), xAxisValueFormatter: IndexAxisValueFormatter(values: xVals))
             marker.chartView = chartView
             marker.minimumSize = CGSize(width: 80, height: 20)
        chartView.marker = marker
        
        
          //  chartView.xAxis.labelCount = xVals.count
            chartView.xAxis.granularity = 1.0
    //        chartView.xAxis.axisMinimum = 0
    //        chartView.xAxis.axisMaximum = Double(xVals.count - 1)
    //        chartView.xAxis.forceLabelsEnabled = true
    //        chartView.xAxis.granularityEnabled = true
        }

        
       fileprivate func gChangeToYLineData(_ rawDatas:[YRawData]) -> [LineChartRawDataWithLabel] {
            var yLineDatas = [LineChartRawDataWithLabel]()
            var index:Int = 0
            for rawData in rawDatas {
                let yLineData = LineChartRawDataWithLabel(data: LineChartRawData(yData: rawData.yData))
                yLineDatas.append(yLineData)
                index += 1
            }
            return yLineDatas
        }

       open func gRealChartSetData(_ chartView:LineChartView, xVals:[String], rawDatas:[YRawData]) {
            let yLineDatas = gChangeToYLineData(rawDatas)
            gLineChartSetData(chartView, xVals: xVals, rawDatas: yLineDatas)
        }


}