## PieChart

Demo:

```tsx
import React from 'react';
import { PieChart } from 'bf-polaris-chart';

export default () => {
  const data = [
    {
      type: '分类一',
      value: 27,
    },
    {
      type: '分类二',
      value: 25,
    },
    {
      type: '分类三',
      value: 18,
    },
    {
      type: '分类四',
      value: 15,
    },
    {
      type: '分类五',
      value: 10,
    },
    {
      type: '其他',
      value: 5,
    },
  ];
  const config = {
    appendPadding: 10,
    data,
    angleField: 'value',
    colorField: 'type',
    radius: 0.8,
    label: {
      type: 'outer',
      content: '{name} {percentage}',
    },
    interactions: [{ type: 'pie-legend-active' }],
  };
  return <PieChart {...config} />;
};
```