npm run eject过后配置webpck.config.js的里面的antd模块（webpack4.28.3版本）

在webpack.config.js里面找到cssRegex，然后把less的配置加上。

const cssRegex = /\.css$/;
const cssModuleRegex = /\.module\.css$/;
const sassRegex = /\.(scss|sass)$/;
const sassModuleRegex = /\.module\.(scss|sass)$/;
//自己添加less
const lessRegex = /\.less$/;
const lessModuleRegex = /\.module\.less$/;

然后再搜索cssRegex，在后面再加上less的配置

 {
              test: cssRegex,
              exclude: cssModuleRegex,
              use: getStyleLoaders({
                importLoaders: 1,
                sourceMap: isEnvProduction && shouldUseSourceMap,
              }),
              // Don't consider CSS imports dead code even if the
              // containing package claims to have no side effects.
              // Remove this when webpack adds a warning or an error for this.
              // See https://github.com/webpack/webpack/issues/6571
              sideEffects: true,
            },
            // Adds support for CSS Modules (https://github.com/css-modules/css-modules)
            // using the extension .module.css
            {
              test: cssModuleRegex,
              use: getStyleLoaders({
                importLoaders: 1,
                sourceMap: isEnvProduction && shouldUseSourceMap,
                modules: true,
                getLocalIdent: getCSSModuleLocalIdent,
              }),
            },

            //自己添加的less配置代码
            {
              test: lessRegex,
              exclude: lessModuleRegex,
              use: getStyleLoaders({
                importLoaders: 2,
                sourceMap: isEnvProduction && shouldUseSourceMap,
              }),
              sideEffects: true,
            },
            {
              test: lessModuleRegex,
              use: getStyleLoaders({
                importLoaders: 2,
                modules: true,
                getLocalIdent: getCSSModuleLocalIdent,
                sourceMap: isEnvProduction && shouldUseSourceMap,
              }),
            },

最后重启项目就ok了！！！