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navbar-nav navbar-right"><li id="nav-homeen"><a href="javascript:;" onclick="changeLang('en')">EN</a></li><li id="nav-apache"><a href="https://www.apache.org/" target="_blank"><img src="https://cdn.jsdelivr.net/gh/apache/echarts-website@asf-site/v4/zh/images/asf_logo_white.png?_v_=20200710_1"></a></li></ul></div></div></nav><div class="page-main"><div class="page-info"><div class="container"><h1>FAQ</h1><p>常见问题的解答</p><p class="page-info-echarts">Apache ECharts<sup>TM</sup></p></div></div><div id="faq-page" class="page-content single-page"><div class="page-nav"><h4>常见问题</h4><ul></ul></div><div class="page-detail"><h2 id="ask-questions">通用问题</h2><h3>有技术问题怎么办？</h3><p>1）建议您在提问前，大致阅读一下<a href="https://echarts.apache.org/zh/option.html">配置项手册</a>左侧导航，了解 ECharts 有哪些配置项，并且在相关的组件下查找是否有实现您需要功能的配置项；</p><p>2）查看本页常见问题的解答；</p><p>3）建议在 <a href="https://gallery.echartsjs.com/editor.html">ECharts Gallery</a> 上添加图表，复现你的问题，如果无法使用代码描述需求，可以尝试提供设计稿或画个草图；</p><p>4）推荐在 <a href="https://stackoverflow.com">stackoverflow.com</a>、<a href="https://www.oschina.net/question/tag/echarts">开源中国</a> 或 <a href="https://segmentfault.com/t/echarts">segmentfault.com</a> 等问答平台上提问，附上图表链接。</p><h3>ECharts 可以免费商用吗？</h3><p>可以，ECharts 基于 <a href="./license.html">Apache License 2.0</a> 开源。</p><h2 id="axis">坐标轴</h2><h3>坐标轴标签显示空间不够怎么办？</h3><p>可以用 <a href="https://echarts.apache.org/zh/option.html#xAxis.interval">interval</a> 控制每隔多少显示标签，设为 <code>0</code> 则显示所有标签。</p><p>或者，可以设置 <a href="https://echarts.apache.org/zh/option.html#yAxis.axisLabel.rotate">axisLabel.rotate</a>，将标签旋转一定角度。</p><h3>把坐标轴设置在右侧好像没有效果？</h3><p>需要将 <a href="https://echarts.apache.org/zh/option.html#yAxis.axisLine.onZero">onZero</a> 设为 <code>false</code> 才行。</p><h3>如何强制显示坐标轴第一个/最后一个标签？</h3><p>ECharts 3.5.2 版本起，支持 <a href="https://echarts.apache.org/zh/option.html#xAxis.axisLabel.showMinLabel">axisLabel.showMinLabel</a> 以及 <a href="https://echarts.apache.org/zh/option.html#xAxis.axisLabel.showMaxLabel">axisLabel.showMaxLabel</a>，分别用来控制第一个/最后一个标签是否强制显示，设为 <code>true</code> 则强制显示。</p><p>如果不方便更新版本，可以参考<a href="https://gallery.echartsjs.com/editor.html?c=xry06afSje">这个例子</a>实现同样的效果。</p><h2 id="legend">图例 legend</h2><h3>图例区域太大导致遮挡住图表怎么办？</h3><p>可以设置 <a href="https://echarts.apache.org/zh/option.html#grid">grid</a> 控制图表区域位置。例如将 <code>grid.top</code> 设置得大一些，可以将绘图区域下移。</p><p>在未来的版本中，我们计划会将布局做得更智能，自动处理这些遮挡问题。</p><h2 id="line-chart">折线图</h2><h3>坐标轴刻度好像和数据不匹配？</h3><p>请检查一下是否设置了 <code>stack</code>，如果不是想做堆积折线图的话，应该将其去掉。</p><h2 id="bar-chart">柱状图</h2><h3>为什么数据值很小的时候，y 轴的刻度会消失？</h3><p>ECharts 3.5.2 版本修复了该问题。</p><h2 id="map-chart">地图</h2><h3>图表上的省份名称重叠，如何修改名称的位置？</h3><p>可以修改地图文件（JS 或 JSON）中对应省份的 <code>cp</code> 坐标，或者通过 <code>echarts.getMap('china')</code> 修改已加载的地图数据。</p><p>更详细的做法请参考：<a href="https://github.com/apache/echarts/issues/4379#issuecomment-257765948">GitHub</a></p><h3>其他国家的地图在哪里下载？</h3><p>可以在<a href="https://github.com/echarts-maps/echarts-countries-js">这里</a>下载到其他国家的地图信息。</p><h3>如何获取地图的缩放事件？</h3><p>首先，需要将系列的 <a href="https://echarts.apache.org/zh/option.html#series-map.roam">roam</a> 设置为 <code>true</code>，然后可以监听 <code>'georoam'</code> 事件。例：</p><pre><code>myChart.on('georoam', function (params) {
   console.log(params);
});</code></pre><p>参见这个<a href="https://gallery.echartsjs.com/editor.html?c=xHyqn_rQ6g">完整的例子</a>。</p><h3>如何制作自定义地图？</h3><p>ECharts 地图在地图坐标的基础上进行过<a href="https://github.com/apache/echarts/blob/8eeb7e5abe207d0536c62ce1f4ddecc6adfdf85e/src/util/mapData/rawData/encode.js">额外的编码</a>。可以使用 <a href="https://github.com/giscafer/mapshaper-plus">mapshaper-plus</a> 工具，上传自定义的 geojson 文件，生成 ECharts 可以使用的地图文件。</p><h2 id="baidu-map">百度地图</h2><h3>如何结合百度地图使用 ECharts？</h3><ol><li>引入 <code>echarts.js</code>、<code>bmap.js</code> 以及 <code>https://api.map.baidu.com/api?v=2.0&ak=这里填在百度开发平台注册得到的 access key</code>；</li><li>在 <code>option</code> 中设置 <code>bmap</code>，参考<a href="https://echarts.apache.org/examples/zh/editor.html?c=effectScatter-bmap">这个例子</a>；</li><li>如需获得百度地图实例，可以通过 <code>chart.getModel().getComponent('bmap').getBMap()</code>，然后根据<a href="https://lbsyun.baidu.com/cms/jsapi/reference/jsapi_reference.html">百度地图 API</a>做进一步设置。</li></ol><p><a href="https://gallery.echartsjs.com/explore.html#components=bmap~sort=rank~timeframe=all~author=all">Gallery</a> 上有更多百度地图的例子，可作为参考。</p><h2 id="gauge-chart">仪表盘</h2><h3>怎么设置仪表盘颜色？</h3><p>可以使用 <a href="https://echarts.apache.org/zh/option.html#series-gauge.axisLine.lineStyle.color">axisLine.lineStyle.color</a> 设置。</p><h2 id="event">事件处理</h2><h3>如何获取图表点击等事件？</h3><p>参考<a href="https://echarts.apache.org/zh/tutorial.html#ECharts%20%E4%B8%AD%E7%9A%84%E4%BA%8B%E4%BB%B6%E5%92%8C%E8%A1%8C%E4%B8%BA">官网教程</a>。ECharts 支持的事件类型请参考<a href="https://echarts.apache.org/zh/api.html#events">相关 API</a>。</p><h2 id="others">其他</h2><h3>图表为什么不显示？</h3><p>你可以检查以下情况：</p><ul><li><code>echarts.js</code> 是否正常被加载；</li><li><code>echarts</code> 变量是否存在；</li><li>调用 <code>echarts.init</code> 的时候，DOM 容器是否有宽高。</li></ul><h3>ECharts 有哪些学习资料？</h3><p>官网是最好的学习平台。此外，在 <a href="https://gallery.echartsjs.com">ECharts Gallery</a> 上学习别人的作品也是一个不错的选择。</p><p>ECharts 相关项目及资源请参见 <a href="https://github.com/ecomfe/awesome-echarts">awesome-echarts</a>。</p><footer class="inner-footer"><div class="container"><div class="row"><div class="col-md-8"><p>Copyright © 2017-2020, The Apache Software Foundation Apache ECharts, ECharts, Apache, the Apache feather, and the Apache ECharts project logo are either registered trademarks or trademarks of the Apache Software Foundation.</p></div><div id="footer-icon-panel" class="col-md-4"><a href="https://www.apache.org"><img src="https://cdn.jsdelivr.net/gh/apache/echarts-website@asf-site/v4/zh/images/asf_logo.svg?_v_=20200710_1" class="footer-apache-logo"></a></div></div></div></footer></div></div></div></div><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script><script type="text/javascript" src="https://cdn.jsdelivr.net/gh/apache/echarts-website@asf-site/v4/zh/js/common.js?_v_=b5b8944fb9"></script><script type="text/javascript">document.getElementById('nav-doc').className = 'active';</script><!-- Baidu Tongji--><script type="text/javascript">var _hmt = _hmt || [];
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