diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..6946bc2
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 张风捷特烈 (toly)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
index 94a6e6b..0a47d84 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 ### FlutterUnit apk 下载体验:
 
 
-![](https://user-gold-cdn.xitu.io/2020/4/17/1718718571499768?w=300&h=390&f=png&s=22153)
+![](https://user-gold-cdn.xitu.io/2020/4/18/1718a20ac5a16964?w=300&h=390&f=png&s=23054)
 
 ---
 
@@ -191,7 +191,7 @@ feature "   支持详情页【相关链接的栈管理】,
 
 ---
 
- - `2020-4-28`
+ - `2020-4-18`
 
 ```
 feature "   小彩蛋: 【长按】底部栏【最左侧按钮】,打开左边菜单栏
diff --git a/lib/views/pages/navigation/unit_navigation.dart b/lib/views/pages/navigation/unit_navigation.dart
index 891c113..dff4aa4 100644
--- a/lib/views/pages/navigation/unit_navigation.dart
+++ b/lib/views/pages/navigation/unit_navigation.dart
@@ -58,12 +58,12 @@ class _UnitNavigationState extends State<UnitNavigation> {
   }
 
   Widget _buildSearchButton(Color color) {
-    return Builder(
-        builder: (context) => FloatingActionButton(
-              backgroundColor: color,
-              child: Icon(Icons.search),
-          onPressed: () => Navigator.of(context).pushNamed(Router.search),
-            ));
+    return FloatingActionButton(
+      elevation: 2,
+      backgroundColor: color,
+      child: Icon(Icons.search),
+      onPressed: () => Navigator.of(context).pushNamed(Router.search),
+    );
   }
 
   _onTapNav(int index) {