How to enlarge the SVG icon in material-ui iconButtons?

问题

Has anyone build webpages using react.js and the Material UI library? How should I resize the icon size? It is a svg icon. I just built an "create new" component, which is a piece of material paper with a content add button on the top. Here is the code.

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;

It looks OK (make sure you are viewing it at full size), but the icon is too small. Then I opened the chrome dev tool, and saw the following html code.

<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>

Using chrome dev tool, I revised the svg icon size and the viewbox property of svg and made the icon larger in browser. But I am not sure how I can resize the icon size in my code. If I write a CSS file to revise the svg it will be problematic if there are more than one svg elements.

回答1:

You have to set the size of the icon in the iconStyle prop in <IconButton>. Example below from the material-ui docs.

From my experience, if you set just the height or the width, nothing happens--only seems to work when you set height & width to the same value.

import React from 'react';
import IconButton from 'material-ui/IconButton';
import ActionHome from 'material-ui/svg-icons/action/home';

const styles = {

  largeIcon: {
    width: 60,
    height: 60,
  },

};

const IconButtonExampleSize = () => (
  <div>
    <IconButton
      iconStyle={styles.largeIcon}

    >
      <ActionHome />
    </IconButton>
  </div>
);

回答2:

do this

<SomeIcon className="svg_icons"/>

.svg_icons{
  transform: scale(1.8);
}

just use scale :D it works

回答3:

With the latest version of material-ui (3.1.0), you can change padding of IconButton and fontSize of SvgIcon to update the looks.

const styles = theme => ({
  smallButton: {
    padding: 6
  },
  largeButton: {
    padding: 24
  },
  largeIcon: {
    fontSize: "3em"
  },
  input: {
    display: "none"
  }
});    

function IconButtons(props) {
  const { classes } = props;
  return (
    <div>
      <IconButton className={classes.smallButton} aria-label="Delete">
        <DeleteIcon fontSize="small" />
      </IconButton>
      <IconButton aria-label="Delete">
        <DeleteIcon fontSize="large" />
      </IconButton>
      <IconButton className={classes.largeButton} aria-label="Delete">
        <DeleteIcon className={classes.largeIcon} />
      </IconButton>
    </div>
  );
}

Live demo

回答4:

I am using IconStyle prop to change the size of svg icon.

<IconButton 
   tooltip="Add New Group" 
   tooltipPosition="top-center" 
   style={{padding: 0, height: 0}} 
   iconStyle={{height: 31, width: 48}} 
   onClick={e => this.openNewList()} 
   disabled={!this.state.newAvailable}>

  <ActionHome />

</IconButton>

回答5:

There are two ways of enlarging the svg, one is to override the style with iconStyle, the other is to edit the code found in https://github.com/callemall/material-ui/blob/master/src/SvgIcon/SvgIcon.js

Note: ContentAdd imports from SvgIcon

const mergedStyles = Object.assign({
 ..
  height: 24, // <-- change default height
  width: 24,  // <-- change default width
 ..
}, style);

return (
  <svg
    {...other}
   ..
    style={prepareStyles(mergedStyles)}
   ..
  >

来源：https://stackoverflow.com/questions/36482126/how-to-enlarge-the-svg-icon-in-material-ui-iconbuttons