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style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">动画</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/animation/transition" class="nav-link"><span class="title">数据过渡动画</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li></ul></li><li class="nav-item"><a class="nav-link"><span class="title">交互</span> <span class="glyphicon glyphicon-menu-down"></span></a> <ul class="nav bd-sidenav level2" style="display:none"><li class="nav-item"><a href="/handbook/zh/how-to/interaction/drag" class="nav-link"><span class="title">拖拽的实现</span></a> <ul class="nav bd-sidenav level3" style="display:none"></ul></li><!----></ul></li></ul></li><li class="nav-item"><div class="nav-link"><span class="title">最佳实践</span></div> <ul class="nav bd-sidenav level1"><!----><li class="nav-item"><a href="/handbook/zh/best-practices/canvas-vs-svg" class="nav-link"><span class="title">Canvas vs. SVG</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li><li class="nav-item"><a href="/handbook/zh/best-practices/aria" class="nav-link"><span class="title">无障碍访问</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li></ul></li><li class="nav-item"><div class="nav-link"><span class="title">编辑本文档</span></div> <ul class="nav bd-sidenav level1"><li class="nav-item"><a href="/handbook/zh/meta/edit-guide" class="nav-link"><span class="title">文档编辑指南</span></a> <ul class="nav bd-sidenav level2" style="display:none"></ul></li></ul></li></ul></div> <div class="open-sidebar"><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 5l7 7-7 7"></path></svg></div></div> <div class="bd-content col-sm-7 pl-sm-2 col-12"><div class="post-content content"><div><div class="post-inner"><!----> <div class="nuxt-content"><article><h1 id="%E5%9C%86%E7%8E%AF%E5%9B%BE" tabindex="-1">圆环图</h1> <p>圆环图同样可以用来表示数据占总体的比例，相比于饼图，它中间空余的部分可以用来显示一些额外的文字等信息，因而也是一种常用的图表类型。</p> <h2 id="%E5%9F%BA%E7%A1%80%E5%9C%86%E7%8E%AF%E5%9B%BE" tabindex="-1">基础圆环图</h2> <p>在 ECharts 中，饼图的半径除了上一小节提到的，可以是一个数值或者字符串之外，还可以是一个包含两个元素的数组，每个元素可以为数值或字符串。当它是一个数组时，它的前一项表示内半径，后一项表示外半径，这样就形成了一个圆环图。</p> <p>从这个角度上来说，可以认为饼图是一个内半径为 0 的圆环图，也就是说，饼图是圆环图的特例。</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  title: {
    text: '圆环图的例子',
    left: 'center',
    top: 'center'
  },
  series: [
    {
      type: 'pie',
      data: [
        {
          value: 335,
          name: 'A'
        },
        {
          value: 234,
          name: 'B'
        },
        {
          value: 1548,
          name: 'C'
        }
      ],
      radius: ['40%', '70%']
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  title<span class="token operator">:</span> <span class="token punctuation">{</span>
    text<span class="token operator">:</span> <span class="token string">'圆环图的例子'</span><span class="token punctuation">,</span>
    left<span class="token operator">:</span> <span class="token string">'center'</span><span class="token punctuation">,</span>
    top<span class="token operator">:</span> <span class="token string">'center'</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      type<span class="token operator">:</span> <span class="token string">'pie'</span><span class="token punctuation">,</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span>
        <span class="token punctuation">{</span>
          value<span class="token operator">:</span> <span class="token number">335</span><span class="token punctuation">,</span>
          name<span class="token operator">:</span> <span class="token string">'A'</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          value<span class="token operator">:</span> <span class="token number">234</span><span class="token punctuation">,</span>
          name<span class="token operator">:</span> <span class="token string">'B'</span>
        <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span>
          value<span class="token operator">:</span> <span class="token number">1548</span><span class="token punctuation">,</span>
          name<span class="token operator">:</span> <span class="token string">'C'</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">]</span><span class="token punctuation">,</span>
      radius<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'40%'</span><span class="token punctuation">,</span> <span class="token string">'70%'</span><span class="token punctuation">]</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <p>如果半径是数组，其中的两项也可以一项是数值，另一项是百分比形式的字符串。但是这样可能导致在某些分辨率下，内半径小于外半径。ECharts 会自动使用小的一项作为内半径，但是仍应小心这样可能会导致的非预期效果。</p> <h2 id="%E5%9C%A8%E5%9C%86%E7%8E%AF%E5%9B%BE%E4%B8%AD%E9%97%B4%E6%98%BE%E7%A4%BA%E9%AB%98%E4%BA%AE%E6%89%87%E5%BD%A2%E5%AF%B9%E5%BA%94%E7%9A%84%E6%96%87%E5%AD%97" tabindex="-1">在圆环图中间显示高亮扇形对应的文字</h2> <p>上面的例子展现了在圆环图中间显示固定文字的例子，下面我们要介绍，如何在圆环图中间显示鼠标高亮的扇形对应的文字。实现这一效果的思路是，利用系列的 <code>label</code>（默认用扇形颜色显示数据的 <code>name</code>），显示在圆环图中间。在默认情况下不显示系列的 <code>label</code>，在高亮时显示。具体的代码如下：</p> <div class="md-live layout-tb"><div class="md-live-editor"><div class="md-live-editor-container"><div class="prism-editor-wrapper"><div class="prism-editor__container"><textarea spellcheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">option = {
  legend: {
    orient: 'vertical',
    x: 'left',
    data: ['A', 'B', 'C', 'D', 'E']
  },
  series: [
    {
      type: 'pie',
      radius: ['50%', '70%'],
      avoidLabelOverlap: false,
      label: {
        show: false,
        position: 'center',
        emphasis: {
          show: true
        }
      },
      labelLine: {
        show: false
      },
      emphasis: {
        label: {
          show: true,
          fontSize: '30',
          fontWeight: 'bold'
        }
      },
      data: [
        { value: 335, name: 'A' },
        { value: 310, name: 'B' },
        { value: 234, name: 'C' },
        { value: 135, name: 'D' },
        { value: 1548, name: 'E' }
      ]
    }
  ]
};</textarea><pre data-testid="preview" class="prism-editor__editor">option <span class="token operator">=</span> <span class="token punctuation">{</span>
  legend<span class="token operator">:</span> <span class="token punctuation">{</span>
    orient<span class="token operator">:</span> <span class="token string">'vertical'</span><span class="token punctuation">,</span>
    x<span class="token operator">:</span> <span class="token string">'left'</span><span class="token punctuation">,</span>
    data<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'A'</span><span class="token punctuation">,</span> <span class="token string">'B'</span><span class="token punctuation">,</span> <span class="token string">'C'</span><span class="token punctuation">,</span> <span class="token string">'D'</span><span class="token punctuation">,</span> <span class="token string">'E'</span><span class="token punctuation">]</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  series<span class="token operator">:</span> <span class="token punctuation">[</span>
    <span class="token punctuation">{</span>
      type<span class="token operator">:</span> <span class="token string">'pie'</span><span class="token punctuation">,</span>
      radius<span class="token operator">:</span> <span class="token punctuation">[</span><span class="token string">'50%'</span><span class="token punctuation">,</span> <span class="token string">'70%'</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
      avoidLabelOverlap<span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
      label<span class="token operator">:</span> <span class="token punctuation">{</span>
        show<span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
        position<span class="token operator">:</span> <span class="token string">'center'</span><span class="token punctuation">,</span>
        emphasis<span class="token operator">:</span> <span class="token punctuation">{</span>
          show<span class="token operator">:</span> <span class="token boolean">true</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      labelLine<span class="token operator">:</span> <span class="token punctuation">{</span>
        show<span class="token operator">:</span> <span class="token boolean">false</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      emphasis<span class="token operator">:</span> <span class="token punctuation">{</span>
        label<span class="token operator">:</span> <span class="token punctuation">{</span>
          show<span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
          fontSize<span class="token operator">:</span> <span class="token string">'30'</span><span class="token punctuation">,</span>
          fontWeight<span class="token operator">:</span> <span class="token string">'bold'</span>
        <span class="token punctuation">}</span>
      <span class="token punctuation">}</span><span class="token punctuation">,</span>
      data<span class="token operator">:</span> <span class="token punctuation">[</span>
        <span class="token punctuation">{</span> value<span class="token operator">:</span> <span class="token number">335</span><span class="token punctuation">,</span> name<span class="token operator">:</span> <span class="token string">'A'</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span> value<span class="token operator">:</span> <span class="token number">310</span><span class="token punctuation">,</span> name<span class="token operator">:</span> <span class="token string">'B'</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span> value<span class="token operator">:</span> <span class="token number">234</span><span class="token punctuation">,</span> name<span class="token operator">:</span> <span class="token string">'C'</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span> value<span class="token operator">:</span> <span class="token number">135</span><span class="token punctuation">,</span> name<span class="token operator">:</span> <span class="token string">'D'</span> <span class="token punctuation">}</span><span class="token punctuation">,</span>
        <span class="token punctuation">{</span> value<span class="token operator">:</span> <span class="token number">1548</span><span class="token punctuation">,</span> name<span class="token operator">:</span> <span class="token string">'E'</span> <span class="token punctuation">}</span>
      <span class="token punctuation">]</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br></pre></div></div></div> <div class="md-live-tag">live</div> <div class="clipboard" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-6 w-6" data-v-479657ca><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 5H6a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2v-1M8 5a2 2 0 002 2h2a2 2 0 002-2M8 5a2 2 0 012-2h2a2 2 0 012 2m0 0h2a2 2 0 012 2v3m2 4H10m0 0l3-3m-3 3l3 3" data-v-479657ca></path></svg></svg></div></div> <div class="md-live-preview"></div></div> <p>其中，<code>avoidLabelOverlap</code> 是用来控制是否由 ECharts 调整标签位置以实现防止标签重叠。它的默认值是 <code>true</code>，而在这里，我们不希望标签位置调整到不是中间的位置，因此我们需要将其设为 <code>false</code>。</p> <p>这样，圆环图中间会显示高亮数据的 <code>name</code> 值。</p></article></div></div> <div class="post-contributors"><h3><span class="inline-block align-middle">本文贡献者</span> <a target="_blank" href="https://github.com/apache/echarts-handbook/tree/master/contents/zh/how-to/chart-types/pie/doughnut.md" title="编辑本文" class="inline-block align-middle text-sm"><svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" class="h-8 w-8 inline-block align-middle"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"></path></svg> <span class="inline-block align-middle">在 GitHub 上编辑本页</span></a></h3> <div class="post-contributors-list"><a href="https://github.com/pissang" target="_blank" class="post-contributor"><img alt="pissang" src="https://avatars.githubusercontent.com/pissang?size=60"> <span>pissang</span></a></div></div></div></div></div></div> <link rel="stylesheet" href="//fastly.jsdelivr.net/npm/highlight.js@9.12.0/styles/github-gist.min.css"></div></div></div></div><script>window.__NUXT__=function(i,t,e,d,r,l,a,g,C,n,I,o,A,c,s,h,p,B,m,b,E,f,w,u,G,W,y,v,x,L,Z,z,D,U,V,H,F,O,J,S,R,M,P,Y,k,K,N,T,X,Q,j,_,$,q,ii,ti,ei,di,ri){return{layout:"default",data:[{html:'<h1 id="%E5%9C%86%E7%8E%AF%E5%9B%BE" tabindex="-1">圆环图</h1>\n<p>圆环图同样可以用来表示数据占总体的比例，相比于饼图，它中间空余的部分可以用来显示一些额外的文字等信息，因而也是一种常用的图表类型。</p>\n<h2 id="%E5%9F%BA%E7%A1%80%E5%9C%86%E7%8E%AF%E5%9B%BE" tabindex="-1">基础圆环图</h2>\n<p>在 ECharts 中，饼图的半径除了上一小节提到的，可以是一个数值或者字符串之外，还可以是一个包含两个元素的数组，每个元素可以为数值或字符串。当它是一个数组时，它的前一项表示内半径，后一项表示外半径，这样就形成了一个圆环图。</p>\n<p>从这个角度上来说，可以认为饼图是一个内半径为 0 的圆环图，也就是说，饼图是圆环图的特例。</p>\n<md-live lang="js" code="\'b3B0aW9uID0gewogIHRpdGxlOiB7CiAgICB0ZXh0OiAn5ZyG546v5Zu-55qE5L6L5a2QJywKICAgIGxlZnQ6ICdjZW50ZXInLAogICAgdG9wOiAnY2VudGVyJwogIH0sCiAgc2VyaWVzOiBbCiAgICB7CiAgICAgIHR5cGU6ICdwaWUnLAogICAgICBkYXRhOiBbCiAgICAgICAgewogICAgICAgICAgdmFsdWU6IDMzNSwKICAgICAgICAgIG5hbWU6ICdBJwogICAgICAgIH0sCiAgICAgICAgewogICAgICAgICAgdmFsdWU6IDIzNCwKICAgICAgICAgIG5hbWU6ICdCJwogICAgICAgIH0sCiAgICAgICAgewogICAgICAgICAgdmFsdWU6IDE1NDgsCiAgICAgICAgICBuYW1lOiAnQycKICAgICAgICB9CiAgICAgIF0sCiAgICAgIHJhZGl1czogWyc0MCUnLCAnNzAlJ10KICAgIH0KICBdCn07\'" v-bind="{}" />\n<p>如果半径是数组，其中的两项也可以一项是数值，另一项是百分比形式的字符串。但是这样可能导致在某些分辨率下，内半径小于外半径。ECharts 会自动使用小的一项作为内半径，但是仍应小心这样可能会导致的非预期效果。</p>\n<h2 id="%E5%9C%A8%E5%9C%86%E7%8E%AF%E5%9B%BE%E4%B8%AD%E9%97%B4%E6%98%BE%E7%A4%BA%E9%AB%98%E4%BA%AE%E6%89%87%E5%BD%A2%E5%AF%B9%E5%BA%94%E7%9A%84%E6%96%87%E5%AD%97" tabindex="-1">在圆环图中间显示高亮扇形对应的文字</h2>\n<p>上面的例子展现了在圆环图中间显示固定文字的例子，下面我们要介绍，如何在圆环图中间显示鼠标高亮的扇形对应的文字。实现这一效果的思路是，利用系列的 <code>label</code>（默认用扇形颜色显示数据的 <code>name</code>），显示在圆环图中间。在默认情况下不显示系列的 <code>label</code>，在高亮时显示。具体的代码如下：</p>\n<md-live lang="js" 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