图表未在tableViewCell中绘制 [英] Charts not plotting in tableViewCell

问题描述

我正在尝试使用Charts 3.0.2（较早的pod版本，因为我使用的是Xcode 8.3）在swift 3中的tableViewCell中绘制随机图表

I am trying to plot a random chart in a tableViewCell in swift 3 using Charts 3.0.2 (an older pod version because I am using Xcode 8.3)

setChart （）函数正在视图控制器类中工作。

setChart() function is working in a view controller class.

这是我的TableViewCell代码-

Here is my TableViewCell Code -

import UIKit
import Charts

class ChartTVC: UITableViewCell {

    @IBOutlet weak var barChartView: BarChartView!

    var months: [String]!
    override func awakeFromNib() {
        super.awakeFromNib()

    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

    }

    func setChart() {
        var dataEntries: [BarChartDataEntry] = []
        barChartView.backgroundColor = UIColor.white
        for i in 100..<105 {
            let dataEntry = BarChartDataEntry(x: Double(i), y: Double(45))
            dataEntries.append(dataEntry)
        }
        let chartDataSet = BarChartDataSet(values: dataEntries, label: "Visitor count")
        let chartData = BarChartData()
        chartData.addDataSet(chartDataSet)
        chartData.setDrawValues(true)
        chartDataSet.colors = [Colors.amber]

        let xaxis:XAxis = XAxis()

        barChartView.xAxis.labelPosition = .bottom
        barChartView.xAxis.drawGridLinesEnabled = true
        barChartView.xAxis.valueFormatter = xaxis.valueFormatter
        barChartView.chartDescription?.enabled = true
        barChartView.legend.enabled = true
        barChartView.rightAxis.enabled = true
        barChartView.leftAxis.drawGridLinesEnabled = true
        barChartView.leftAxis.drawLabelsEnabled = true
        barChartView.data = chartData
    }

}

这就是我从视图控制器类中调用它的方式

And This is how I am calling it from a view controller class

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "ChartTVC", for: indexPath) as! ChartTVC
    cell.setChart()

    return cell
}

我阅读了许多教程博客，但找不到任何错误的代码。
我为条形图视图设置了高度限制。这是屏幕截图。

I read many tutorial blogs and I couldn't find anything wrong with the code. I had set a height constraint for bar chart view. Here's the screenshot.

图表文字是标签。

推荐答案

设置图表数据后尝试调用此方法：

Try to call this after you set chart data:

barChartView.notifyDataSetChanged()

这篇关于图表未在tableViewCell中绘制的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！