古柯豆荚图表未出现（Swift4）

Question

我的图表没有使用此条形图显示任何条形图。我已经成功导入了图表可可豆荚。当前没有运行时错误。图形中唯一显示的是描述标签。

    import UIKit
import Charts
class ViewController: UIViewController {


@IBOutlet var lineChartVIew: BarChartView!
var days: [String]!


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    days = ["Monday","Tuesday","life"]
    let task = [1.0,4.0,3.0]
    setChart(dataPoints: days, values: task)
}

func setChart(dataPoints : [String], values : [Double]){
    lineChartVIew.noDataText = "Nothining to display"

    var dataEntries : [BarChartDataEntry] = []
    var counter = 0.0

    for i in 0..<dataPoints.count {
        counter += 1
        let dataEntery = BarChartDataEntry(x: values[i], y: counter)
        dataEntries.append(dataEntery)
    }

    let ChartDataSet = BarChartDataSet(values: dataEntries, label: "Time")
    let chartData = BarChartData()
    lineChartVIew.data = chartData
    ChartDataSet.colors = ChartColorTemplates.colorful()

    lineChartVIew.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)
}}

Answer 1

尝试一下它正在起作用（Swift 4代码）。

import UIKit
import Charts

class RootViewController: UIViewController {

@IBOutlet weak var lineChartView: BarChartView!

var days: [String]!

    override func viewDidLoad() {
         super.viewDidLoad()

         days = ["Monday","Tuesday","Wednesday","Thursday"]
         let task = [1.0,4.0,3.0,5.0]
         setChart(dataPoints: days, values: task)     
    }

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

       lineChartView.noDataText = "Nothining to display"
       var dataEntries : [BarChartDataEntry] = []
       var counter = 0.0

       for i in 0..<dataPoints.count {
            counter += 1
            let dataEntery = BarChartDataEntry(x: counter, y:values[i], data: days as AnyObject)
            dataEntries.append(dataEntery)
       }

       let ChartDataSet = BarChartDataSet(values: dataEntries, label: "Time")
       let chartData = BarChartData()
       chartData.addDataSet(ChartDataSet)
       lineChartView.data = chartData
       ChartDataSet.colors = ChartColorTemplates.joyful()
       lineChartView.animate(xAxisDuration: 2.0, yAxisDuration: 2.0)

   }
}

输出为：

修改图形隐藏和显示轴及标签

lineChartView.leftAxis.drawLabelsEnabled = false // Hide Left Axis Label
lineChartView.rightAxis.drawLabelsEnabled = false // Hide Right Axis Label
lineChartView.xAxis.drawLabelsEnabled = false // Hide Top Axis Label

lineChartView.leftAxis.enabled = false // Hide Left Axis Lines
lineChartView.rightAxis.enabled = false // Hide Right Axis Lines      
lineChartView.xAxis.enabled = false // Hide Right Axis Lines

lineChartView.legend.enabled = false //Hide Legend of Chart

lineChartView.chartDescription?.text = "" // Hide or Change Chart Description text