提交：提交代码；

lib/widget/state_layout.dart

@@ -64,15 +64,12 @@ class _StateLayoutState extends State<StateLayout> {
       children: <Widget>[
         Offstage(
           offstage: img.isEmpty,
-          child: Opacity(
-            opacity: 1,
-            child: Container(
-              height: 120.0,
-              width: 120.0,
-              decoration: BoxDecoration(
-                image: DecorationImage(
-                  image: ImageUtils.getAssetImage(img),
-                ),
+          child: Container(
+            height: 120.0,
+            width: 120.0,
+            decoration: BoxDecoration(
+              image: DecorationImage(
+                image: ImageUtils.getAssetImage(img),
               ),
             ),
           ),