有人使用react.js和Material UI库创建网页吗？我应该如何调整图标大小？它是一个svg图标.
import React from 'react';
import Paper from 'material-ui/lib/paper';
import ContentAdd from 'material-ui/lib/svg-icons/content/add';
import IconButton from 'material-ui/lib/icon-button';
const styleForPaper = {
width: '96vw',
height: '20vh',
margin: 20,
textAlign: 'center',
display: 'inline-block',
};
const styleForButton = {
'marginTop': '7vh',
};
const PaperToAddNewWidgets = () => (
<div>
<Paper style={styleForPaper} zDepth={2}>
<IconButton
style={styleForButton}
touch={true}
tooltip="Add New Widget">
<ContentAdd/>
</IconButton>
</Paper>
</div>
);
export default PaperToAddNewWidgets;它看起来没问题(请确保您以全尺寸查看)，但图标太小.然后我打开chrome开发工具，看到了下面的html代码.
<div style="background-color:#ffffff;transition:all 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms;box-sizing:border-box;font-family:Roboto, sans-serif;-webkit-tap-highlight-color:rgba(0,0,0,0);box-shadow:0 3px 10px rgba(0,0,0,0.16),
0 3px 10px rgba(0,0,0,0.23);border-radius:2px;width:96vw;height:20vh;margin:20px;text-align:center;display:inline-block;mui-prepared:;" data-reactid=".0.2.0.1.0"><button style="border:10px;background:none;box-sizing:border-box;display:inline-block;font:inherit;font-family:Roboto, sans-serif;tap-highlight-color:rgba(0, 0, 0, 0);cursor:pointer;text-decoration:none;outline:none;transform:translate3d(0, 0, 0);position:relative;transition:all 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms;padding:12px;width:48px;height:48px;font-size:0;margin-top:7vh;mui-prepared:;-webkit-appearance:button;" tabindex="0" type="button" data-reactid=".0.2.0.1.0.0"><div data-reactid=".0.2.0.1.0.0.0"><span style="height:100%;width:100%;position:absolute;top:0;left:0;overflow:hidden;mui-prepared:;" data-reactid=".0.2.0.1.0.0.0.0"></span><div style="position: absolute; font-family: Roboto, sans-serif; font-size: 14px; line-height: 32px; padding: 0px 16px; z-index: 3000; color: rgb(255, 255, 255); overflow: hidden; top: -10000px; border-radius: 2px; opacity: 0; left: -44px; transition: top 0ms cubic-bezier(0.23, 1, 0.32, 1) 450ms, transform 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms, opacity 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms; box-sizing: border-box; -webkit-user-select: none;" data-reactid=".0.2.0.1.0.0.0.1:0"><div style="position: absolute; left: 50%; top: 0px; transform: translate(-50%, -50%); border-radius: 50%; transition: width 0ms cubic-bezier(0.23, 1, 0.32, 1) 450ms, height 0ms cubic-bezier(0.23, 1, 0.32, 1) 450ms, backgroundColor 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms; width: 0px; height: 0px; background-color: transparent;" data-reactid=".0.2.0.1.0.0.0.1:0.0"></div><span style="position:relative;white-space:nowrap;mui-prepared:;" data-reactid=".0.2.0.1.0.0.0.1:0.1">Add New Widget</span></div><svg style="display:inline-block;height:24px;width:24px;transition:all 450ms cubic-bezier(0.23, 1, 0.32, 1) 0ms;fill:rgba(0, 0, 0, 0.87);mui-prepared:;-webkit-user-select:none;" viewBox="0 0 24 24" data-reactid=".0.2.0.1.0.0.0.1:2:$/=10"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z" data-reactid=".0.2.0.1.0.0.0.1:2:$/=10.0"></path></svg></div></button></div>使用chrome开发工具，我修改了svg图标大小和svg的viewbox属性，并在浏览器中放大了图标.但我不确定如何在代码中调整图标大小.如果我编写一个CSS文件来修改svg，那么如果有多个svg元素，就会出现问题.