ios - echarts(iOS图表)未显示在自定义uitableviewcell中

Question

screenshot

我遇到饼图未显示在自定义表格 View 单元格中的问题。 TableView 单元格是通过 Storyboard添加的，每个单元格包含一个小图标图像、两个标签和一个 UIView，我在 View 检查器中将其设置为 PieChartView。

两个标签中的小图标图像和文本显示良好，没有问题。然而，对于饼图，我没有收到任何错误消息，但只是没有显示任何图表。表格显示出来，在标签中填充了正确的文本，但饼图 View 除了饼图的中间孔之外是空的。当我单击其中一个时，会显示饼图 View - 不完全正确(仅显示两个饼图切片之一，另一部分丢失)。

因此，触摸事件使切片可见，但我希望在运行行函数的单元格时，所有单元格都可以看到饼图。

我已经添加了 tableviewcontroller 和 tableviewcell 的代码。如果有人能指出我的错误，那就太好了。我研究并尝试了很多，其中包括以下堆栈溢出资源: Charts not plotting in tableViewCell iosChart not displaying LineChartView points in UITableViewCell Adding a SubView to UITableViewCell doesn't get displayed How to implement iOS Chart in a tableview cell?

截图显示了我点击几个不可见的饼图后的情况。它们变得可见，当我向下滚动表格时，随机单元格中的更多(并非全部)饼图可见，有些则不可见。

tableviewcontroller 的代码:

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

        let easyVoc = parsedInEasyVocStructures[indexPath.row]

        //get the current voc for the writings
        let currentVoc = BVBVocabularyManager.getVoc()

        cell.label1.text = currentVoc.kanji

        cell.label2.text = currentVoc.kanji2

        let image = UIImage(named: "plus")
        cell.plusMinusImage.image = image

        //set the percentages
        cell.percentageSolved = arrayOfSuccessPercentagesForPieChart
        cell.percentageNotSolved = arrayOfNegativeSuccessPercentagesForPieChart

        cell.setChart(forIndexNo:indexPath.row, dataPoints: months, valuesSolved: arrayOfSuccessPercentagesForPieChart, valuedNonSolved: arrayOfNegativeSuccessPercentagesForPieChart)

        cell.setNeedsDisplay()
        cell.pieChartView.clipsToBounds = true
        cell.pieChartView.layer.masksToBounds = true
        cell.pieChartView.contentMode = .scaleAspectFit

        return cell
    }

对于tableViewCell:

class BVBResultsDiffAndEasyAllWordsGraphTableViewCell: UITableViewCell {

    @IBOutlet weak var kanjiL: UILabel!
    @IBOutlet weak var translationL: UILabel!
    @IBOutlet weak var pieChartView: PieChartView!

    @IBOutlet weak var plusMinusImage: UIImageView!

    var testconditions: Array<String>?
    var percentageSolved: Array<Int>? 
    var percentageNotSolved: Array<Int>? 

    var solvedPercentageDataEntry = PieChartDataEntry(value: 0)
    var nonSolvedPercentageDataEntry = PieChartDataEntry(value: 0)

    var percentageSolvedNonSolvedDataEntries = [PieChartDataEntry]()


    override func awakeFromNib() {
        super.awakeFromNib()

        solvedPercentageDataEntry.label = NSLocalizedString("solved", comment: "piechart label for the solved area")
        pieChartView.chartDescription?.text = ""
        pieChartView.legend.enabled = false
        pieChartView.setExtraOffsets(left: 2, top: 0, right: 2, bottom: 0)

        pieChartView.holeRadiusPercent = 2.8     
 }

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

        // Configure the view for the selected state

        //not used
    }


    func setChart(forIndexNo: Int, dataPoints: [String], valuesSolved: [Int], valuedNonSolved: [Int]){

        var dataEntries: [PieChartDataEntry] = []

        solvedPercentageDataEntry = PieChartDataEntry(value: Double(valuesSolved[forIndexNo]), label: "")
        nonSolvedPercentageDataEntry = PieChartDataEntry(value:Double(valuedNonSolved[forIndexNo]), label: "")

        dataEntries = [solvedPercentageDataEntry, nonSolvedPercentageDataEntry]

        percentageSolvedNonSolvedDataEntries = [solvedPercentageDataEntry, nonSolvedPercentageDataEntry]

        let pieChartDataSet = PieChartDataSet(entries: percentageSolvedNonSolvedDataEntries, label: nil)

        pieChartDataSet.drawValuesEnabled = false 

        let pieChartData = PieChartData(dataSet: pieChartDataSet)

        let colors = [UIColor.themeColor(), UIColor.red]

        pieChartDataSet.colors = colors as! [NSUIColor]

        pieChartView.data = pieChartData

        pieChartView.notifyDataSetChanged()
    }

}

Answer 1

我测试了你的代码。效果很好。还有中间那个洞，可能是配置问题。尝试添加这个

    pieChartDataSet.drawIconsEnabled = false
    pieChartDataSet.sliceSpace = 1
    pieChartDataSet.highlightColor = UIColor.white
    pieChartDataSet.entryLabelColor = UIColor.white
    pieChartDataSet.selectionShift = 0

    pieChartView.holeRadiusPercent = 0.5
    pieChartView.transparentCircleRadiusPercent = 0.0

希望这有帮助