Merge branch 'develop' into welcome

lib/components/fourth_page_feature/pages.dart

@@ -6,14 +6,14 @@ final pages = [
   new PageViewModel(
       const Color(0xFFcd344f),
       //'assets/mountain.png',
-      'assets/images/p1.png',
+      'assets/images/p2.png',
       'FlutterGo是什么？',
       '【FlutterGo】 是由"阿里拍卖"前端团队几位 Flutter 粉丝，用业余时间开发的一款，用于 Flutter 教学帮助的App，这里没有高大尚的概念，只有一个一个亲历的尝试，用最直观的方式展示的 Flutter 官方demo',
       'assets/images/plane.png'),
   new PageViewModel(
       const Color(0xFF638de3),
       //'assets/world.png',
-      'assets/images/p2.png',
+      'assets/images/p1.png',
       'FLutterGo的背景',
       '🐢 官网文档示例较不够健全，不够直观\n🐞 运行widget demo要到处翻阅资料\n🐌 英文文档翻译生涩难懂，学习资料太少\n',
       'assets/images/calendar.png'),

lib/widgets/elements/Form/Text/RichText/demo.dart

@@ -0,0 +1,33 @@
+/**
+ * Created with Android Studio.
+ * User: 三帆
+ * Date: 14/01/2019
+ * Time: 19:02
+ * email: sanfan.hx@alibaba-inc.com
+ * tartget:  xxx
+ */
+
+import 'package:flutter/material.dart';
+
+class Demo extends StatefulWidget {
+  _Demo createState() => _Demo();
+}
+
+class _Demo extends State<Demo> {
+
+  Widget build(BuildContext context) {
+    return Container(
+      color: Color(0xff000000),
+      width: 750.0,
+      child:  RichText(
+        text: TextSpan(
+          text: 'Hello ',
+          children: <TextSpan>[
+            TextSpan(text: 'bold', style: TextStyle(fontWeight: FontWeight.bold, color: Color(0xfffffc42))),
+            TextSpan(text: ' world!', style: TextStyle(fontStyle: FontStyle.italic)),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/widgets/elements/Form/Text/RichText/index.dart

@@ -1,7 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_markdown/flutter_markdown.dart';
 import '../../../../../common/widget_demo.dart';
-
+import 'demo.dart';
 const String intro = """
 # 富文本显示
 
@@ -70,20 +70,7 @@ class _Demo extends State<Demo> {
       contentList: [new Column(
         children: <Widget>[
           MarkdownBody(data: markDesc['intro']),
-          Container(
-            color: Color(0xff000000),
-            width: 750.0,
-            child:  RichText(
-              text: TextSpan(
-                text: 'Hello ',
-//                style: TextStyle(fontWeight: FontWeight.normal, inherit: true, fontSize: 44),
-                children: <TextSpan>[
-                  TextSpan(text: 'bold', style: TextStyle(fontWeight: FontWeight.bold, color: Color(0xfffffc42))),
-                  TextSpan(text: ' world!', style: TextStyle(fontStyle: FontStyle.italic)),
-                ],
-              ),
-            ),
-          ),
+          Demo(),
           MarkdownBody(data: markDesc['diff']),
         ],
       ),