如何使用phpspreadsheet绘制或实现饼图？

composer require phpoffice/phpspreadsheet

require 'vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
use PhpOffice\PhpSpreadsheet\Chart\Chart;
use PhpOffice\PhpSpreadsheet\Chart\DataSeries;
use PhpOffice\PhpSpreadsheet\Chart\DataSeriesValues;
use PhpOffice\PhpSpreadsheet\Chart\Legend;
use PhpOffice\PhpSpreadsheet\Chart\PlotArea;
use PhpOffice\PhpSpreadsheet\Chart\Title;

$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();

$data = [
    ['Category', 'Value'],
    ['Category 1', 30],
    ['Category 2', 50],
    ['Category 3', 20],
];

$sheet->fromArray($data, null, 'A1');

$chart = new Chart(
    'chart1', // 图表ID
    new Title('Pie Chart'), // 图表标题
    new Legend(Legend::POSITION_RIGHT), // 图例位置
    new PlotArea(null, [new DataSeriesValues('String', 'Worksheet!$B$1', null, 3)], null) // 数据区域
);

$chart->setTopLeftPosition('D2');
$chart->setBottomRightPosition('K15');
$sheet->addChart($chart);

$writer = new Xlsx($spreadsheet);
$writer->save('pie_chart.xlsx');