Swift's powerful chart library-charts uses

Preface: Today to share a very beautiful powerful chart library, I hope that the students who need help, like to please a praise, support. Thank you!
How to join the Swift library in a project see my previous article
Http://www.jianshu.com/p/fd91c10c9f55

Compilation Environment: Xcode7.3

Add Charts Chart Library

// 在Podfile中‘Charts‘

import Charts

Create bar chart

func createLineChartView()    {        chartView = BarChartView.init(frame: CGRectMake(06464))        chartView.barData        // 签协议        chartView.delegate = self        chartView.backgroundColor = UIColor.whiteColor()        self.view.addSubview(chartView)    }

Analog Data Assignment

Func Setchart (datapoints: [String], values: [Double]) {varDataentries: [Barchartdataentry] = [] forI in0.. <datapoints.count {Let dataEntry = Barchartdataentry (Value:values[i], xindex:i) DATAENTRIES.A Ppend (DataEntry)} Let Chartdataset = Barchartdataset (yvals:dataentries, Label:"Units Sold") Let ChartData = Barchartdata (xvals:months, Dataset:chartdataset)//Add a boundary to show the red line in the diagramLet JX = Chartlimitline (limit:12.0, Label:"I am Limitline") ChartView.rightAxis.addLimitLine (JX) Chartview.data = ChartData//Custom Colors        There are 12 bars in the//example        //Colors is an array that can give the corresponding colorChartdataset.colors = [Uicolor.bluecolor (), Uicolor.redcolor (), Uicolor.cyancolor ()]//API comes with color template        //Chartcolortemplates.liberty ()        //chartcolortemplates.joyful ()        //Chartcolortemplates.pastel ()        //chartcolortemplates.colorful ()        //Chartcolortemplates.vordiplom ()Chartdataset.colors = Chartcolortemplates.liberty ()/**//animation effect, a simple list of several, specifically see the API case easeinback case easeoutback case Easeinoutback Case easeinbounce Case easeoutbounce Case Easeinoutbounce * /        //Add animationChartview.animate (yaxisduration:1.0, Easingoption:. Easeinbounce)}

You can also save the current chart state, write a Save button

 func Createrightbarbuttonitem () {Let buttonright = Uibutton.init  (Type:uibuttontype) Buttonright.frame  = CGRectMake (0< /span>, 0 , 40 , 40 ) Self.navigationitem   = Uibarbuttonitem (customview:buttonright) buttonright.s Ettitle  ( "Save" , Forstate:uicontrolstate . Normal ) Buttonright.addtarget  (self, Action: #selector (Viewcontroller.save (_:)), forControlEvents:UIControlEvents.TouchUpInside) }< /code>

Click on the method to add the following code

save(btn: UIButton)    {        // 保存到相册        chartView.saveToCameraRoll()        print("保存成功")    }

You may also want to implement different click events by clicking on a single column
You can achieve chartviewdelegate

class ViewController: UIViewController, ChartViewDelegate {// 在创建的时候签协议// chartView.delegate = self// 实现协议方法func chartValueSelected(chartView: ChartViewBase, entry: ChartDataEntry, dataSetIndex: Int,     highlight: ChartHighlight) {        print("\(entry.value) in \(months[entry.xIndex])")    }

This creates a line chart

chartView = LineChartView.init(frame: CGRectMake(0, 64, screenWidth, screenHeight - 64))

The analog data assignment is changed to the following code

var dataEntries: [ChartDataEntry] = []        forin0..<dataPoints.count {            let dataEntry = ChartDataEntry(value: values[i], xIndex: i)            dataEntries.append(dataEntry)        }        let"Units Sold")        let chartData = LineChartData(xVals: months, dataSet: chartDataSet)

Summary: The icon supports zoom click, here I only give two styles of icon code example, details please see the official API and demo please click
Considering the article may be confusing some places are not clear I will put on GitHub address, easy to learn download view please click

Swift's powerful chart library-charts uses