初步优化项目结构

lib/widget_system/widgets/SingleChildRenderObjectWidget/Center/node1_base.dart

@@ -0,0 +1,29 @@
+
+import 'package:flutter/material.dart';
+/// create by 张风捷特烈 on 2020-04-19
+/// contact me by email 1981462002@qq.com
+/// 说明:
+
+//    {
+//      "widgetId": 86,
+//      "name": 'Center基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【child】 : 孩子组件   【Widget】",
+//    }
+class CustomCenter extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+        margin: EdgeInsets.all(5),
+        width: 200,
+        height: 100,
+        color: Colors.grey.withAlpha(88),
+        child: Center(
+            child: Container(
+          width: 80,
+          height: 60,
+          color: Colors.cyanAccent,
+        )));
+  }
+}