add tab bar

src/pages/index/index.config.ts

@@ -1,3 +1,4 @@
 export default definePageConfig({
-  navigationBarTitleText: '首页'
+  navigationBarTitleText: '首页',
+  usingComponents: {}
 })

src/pages/index/index.tsx

@@ -14,9 +14,7 @@ class Index extends Component {
   render(): ReactNode {
     return (
       <View>
-        <Text>
-          {this.state.msg}
-        </Text>
+        <Text>{this.state.msg}</Text>
       </View>
     )
   }