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echarts环形图中间加文字，并且大小可以自适应，怎么做？

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echarts环形图中间加文字，并且大小可以自适应，怎么做？

效果如图所示，用title和graphic可以实现图中心加文字
用echarts.resize()可以实现环形图随屏幕尺寸修改而自适应，但文字大小不会变化，这个要怎么设置？

image.png

在网上找的类似这种方法都没有生效，在methods里定义转换方法，在图表fontSize里调用无法生效。
vue本身有用amfe-flexible和postcss-pxtorem做rem转换，图表里设置是合这有冲突吗？


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by (71.8m points)

resize之前，setOption 改一下 fontSize


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