bugfix: fix locale context is null

src/router.js

 import React from 'react';
 import { routerRedux, Route, Switch } from 'dva/router';
-import { LocaleProvider, Spin } from 'antd';
+import { Spin } from 'antd';
 import dynamic from 'dva/dynamic';
-import { addLocaleData, IntlProvider } from 'react-intl';
 import { getRouterData } from './common/router';
 import Authorized from './utils/Authorized';
 import { getQueryPath } from './utils/utils';
+import { LocalComponent } from './locale/localeContext';
 import styles from './index.less';
-import enLocale from './locale/en-US';
-import cnLocale from './locale/zh-CN';
 
 const { ConnectedRouter } = routerRedux;
 const { AuthorizedRoute } = Authorized;
@@ -16,37 +14,26 @@ dynamic.setDefaultLoadingComponent(() => {
   return <Spin size="large" className={styles.globalSpin} />;
 });
 
-function getLang() {
-  return (window.localStorage && localStorage.getItem('locale')) ||
-    (navigator.language || navigator.browserLanguage).toLowerCase() === 'en-us'
-    ? 'en-US'
-    : 'zh-CN';
-}
-
 function RouterConfig({ history, app }) {
   const routerData = getRouterData(app);
   const UserLayout = routerData['/user'].component;
   const BasicLayout = routerData['/'].component;
-  const appLocale = getLang() === 'zh-CN' ? cnLocale : enLocale;
-  addLocaleData(appLocale.data);
   return (
-    <IntlProvider locale={appLocale.locale} messages={appLocale.messages}>
-      <LocaleProvider locale={appLocale.antd}>
-        <ConnectedRouter history={history}>
-          <Switch>
-            <Route path="/user" component={UserLayout} />
-            <AuthorizedRoute
-              path="/"
-              render={props => <BasicLayout {...props} />}
-              authority={['admin', 'user']}
-              redirectPath={getQueryPath('/user/login', {
-                redirect: window.location.href,
-              })}
-            />
-          </Switch>
-        </ConnectedRouter>
-      </LocaleProvider>
-    </IntlProvider>
+    <LocalComponent>
+      <ConnectedRouter history={history}>
+        <Switch>
+          <Route path="/user" component={UserLayout} />
+          <AuthorizedRoute
+            path="/"
+            render={props => <BasicLayout {...props} />}
+            authority={['admin', 'user']}
+            redirectPath={getQueryPath('/user/login', {
+              redirect: window.location.href,
+            })}
+          />
+        </Switch>
+      </ConnectedRouter>
+    </LocalComponent>
   );
 }