加入约束布局

pubspec.yaml

@@ -59,6 +59,9 @@ dependencies:
   # sample示例：https://github.com/xuelongqy/flutter_easy_refresh/tree/v3/example/lib/page/sample
   easy_refresh: ^3.3.1
 
+  # 约束布局  https://github.com/hackware1993/Flutter_ConstraintLayout/blob/master/README_CN.md
+  flutter_constraintlayout: ^1.6.3-stable
+
 dev_dependencies:
   flutter_test:
     sdk: flutter