🎨 优化展示组件代码的存在形式,stateless重构完毕

lib/views/widgets/StatelessWidget/SnackBar/node1_base.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+
+/// create by 张风捷特烈 on 2020-03-25
+/// contact me by email 1981462002@qq.com
+/// 说明:
+//    {
+//      "widgetId": 140,
+//      "name": 'SnackBar基本使用',
+//      "priority": 1,
+//      "subtitle":
+//          "【content】 : 中间内容组件   【Widget】\n"
+//          "【action】 : 右侧按钮   【SnackBarAction】\n"
+//          "【duration】 : 持续时长   【Widget】\n"
+//          "【backgroundColor】 : 背景色   【Color】\n"
+//          "【elevation】 : 影深   【double】\n"
+//          "【shape】 : 形状   【ShapeBorder】\n"
+//          "【onVisible】 : 显示时回调  【Function()】",
+//    }
+class CustomSnackBar extends StatefulWidget {
+  @override
+  _CustomSnackBarState createState() => _CustomSnackBarState();
+}
+
+class _CustomSnackBarState extends State<CustomSnackBar> {
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+        child: FlatButton(
+            color: Colors.blue,
+            onPressed: () =>
+                Scaffold.of(context).showSnackBar(_buildSnackBar()),
+            child: Text(
+              '点我弹出SnackBar',
+              style: TextStyle(color: Colors.white),
+            )));
+  }
+
+  Widget _buildSnackBar() {
+    return SnackBar(
+      elevation: 3,
+      shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.only(
+              topLeft: Radius.circular(10), topRight: Radius.circular(10))),
+      content: Text('Wellcome to for join Flutter Unit!'),
+      duration: Duration(seconds: 3),
+      //持续时间
+      backgroundColor: Colors.red,
+      onVisible: () => print('onVisible'),
+      action: SnackBarAction(
+          textColor: Colors.white, label: '确定', onPressed: () {}),
+    );
+  }
+}