bugfix: fix #4349,UserLayout getPageTitle doesn't show title

src/layouts/UserLayout.tsx

 import SelectLang from '@/components/SelectLang';
 import GlobalFooter from '@/components/GlobalFooter';
-import { ConnectProps } from '@/models/connect';
+import { ConnectProps, ConnectState } from '@/models/connect';
+import { connect } from 'dva';
 import { Icon } from 'antd';
-import React, { Component, Fragment } from 'react';
+import React from 'react';
 import DocumentTitle from 'react-document-title';
-import { formatMessage } from 'umi-plugin-locale';
+import { formatMessage } from 'umi-plugin-react/locale';
 import Link from 'umi/link';
 import logo from '../assets/logo.svg';
 import styles from './UserLayout.less';
@@ -29,32 +30,37 @@ const links = [
 ];
 
 const copyright = (
-  <Fragment>
+  <>
     Copyright <Icon type="copyright" /> 2019 蚂蚁金服体验技术部出品
-  </Fragment>
+  </>
 );
 
 export interface UserLayoutProps extends ConnectProps {
   breadcrumbNameMap: { [path: string]: MenuDataItem };
-  navTheme: string;
 }
 
-class UserLayout extends Component<UserLayoutProps> {
-  render() {
+const UserLayout: React.SFC<UserLayoutProps> = props => {
   const {
     route = {
       routes: [],
     },
-    } = this.props;
+  } = props;
   const { routes = [] } = route;
-    const { children, location } = this.props;
-    const { breadcrumb } = getMenuData(routes, this.props);
+  const {
+    children,
+    location = {
+      pathname: '',
+    },
+  } = props;
+  const { breadcrumb } = getMenuData(routes, props);
+
   return (
     <DocumentTitle
       title={getPageTitle({
-          pathname: location!.pathname,
+        pathname: location.pathname,
         breadcrumb,
         formatMessage,
+        ...props,
       })}
     >
       <div className={styles.container}>
@@ -77,7 +83,8 @@ class UserLayout extends Component<UserLayoutProps> {
       </div>
     </DocumentTitle>
   );
-  }
-}
+};
 
-export default UserLayout;
+export default connect(({ settings }: ConnectState) => ({
+  ...settings,
+}))(UserLayout);