fix(解决由于flutter 版本问题导致的报错):

lib/resources/shared_preferences_keys.dart

@@ -0,0 +1,21 @@
+/**
+ * Created with Android Studio.
+ * User: 三帆
+ * Date: 31/01/2019
+ * Time: 18:13
+ * 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();
+  }
+}

lib/widgets/elements/Form/Slider/SliderThemeData/index.dart

@@ -32,7 +32,7 @@ class Demo extends StatefulWidget {
 }
 
 class _Demo extends State<Demo> {
-  Color c = CupertinoColors.darkBackgroundGray;
+  Color c = CupertinoColors.activeBlue;
   Widget build(BuildContext context) {
     return WidgetDemo(
       title: 'SliderThemeData',

lib/widgets/themes/Cupertino/CupertinoApp/demo.dart

@@ -139,7 +139,7 @@ class _CupertinoAppFullDefault extends State {
               middle: Text('这里是标题', style: TextStyle(color: Colors.white)),
             ),
             child: Center(child: Text('这里是内容', style: TextStyle(color: Colors.black))),
-            backgroundColor: CupertinoColors.extraLightBackgroundGray,
+            backgroundColor: CupertinoColors.inactiveGray,
           );
         }
     );

lib/widgets/themes/Cupertino/CupertinoButton/demo.dart

@@ -34,7 +34,7 @@ class _CupertinoButtonFullDefault extends State {
         print('on Pressed!');
       },
       pressedOpacity:0.5,// 按下后的按钮不透明度
-      color:CupertinoColors.darkBackgroundGray,
+      color:CupertinoColors.inactiveGray,
       child: new Text('CupertinoButton'),
     );
   }

lib/widgets/themes/Cupertino/CupertinoNavigationBar/demo.dart

@@ -102,7 +102,7 @@ class _CupertinoNavigationBarFullDefault extends State {
         middle: Text('Title'),// 放置在导航栏的中间。通常是标题或分段控件
         trailing: Icon(CupertinoIcons.share),// 放置在导航栏的末尾。通常在页面上执行其他操作，例如搜索或编辑功能
         actionsForegroundColor:CupertinoColors.white,// 用于 导航栏中前导和尾随小部件的文本和图标的默认颜色。
-        backgroundColor:CupertinoColors.activeOrange,// 导航栏的背景颜色。如果它包含透明度，标签栏将自动对其背后的内容产生模糊效果
+        backgroundColor:CupertinoColors.activeGreen,// 导航栏的背景颜色。如果它包含透明度，标签栏将自动对其背后的内容产生模糊效果
         border:Border( // 边框样式
           bottom: BorderSide(color: CupertinoColors.inactiveGray, width: 1.0),
         ),

lib/widgets/themes/Cupertino/CupertinoPageScaffold/demo.dart

@@ -34,7 +34,7 @@ class _CupertinoPageScaffoldFullDefault extends State {
 
   Widget navigationBar(BuildContext context) {
     return CupertinoPageScaffold( // 进入程序后显示的第一个页面,传入的是一个Widget，但实际上这个Widget需要包裹一个Scaffold
-        backgroundColor:CupertinoColors.extraLightBackgroundGray,// 整个脚手架下面的 widget 的颜色
+        backgroundColor:CupertinoColors.inactiveGray,// 整个脚手架下面的 widget 的颜色
         navigationBar: CupertinoNavigationBar(
           leading: Icon(CupertinoIcons.back),// 放置在导航栏的开头。通常是正常页面的后退按钮或完整页面对话框的取消按钮
           middle: Text('这里是标题'),// 放置在导航栏的中间。通常是标题或分段控件

lib/widgets/themes/Cupertino/CupertinoPicker/demo.dart

@@ -47,7 +47,7 @@ class _CupertinoPickerDemoState extends State<CupertinoPickerDemo> {
   Widget _buildMenu(List<Widget> children) {
     return Container(
       decoration: BoxDecoration(
-        color: CupertinoTheme.of(context).scaffoldBackgroundColor,
+        color:CupertinoColors.inactiveGray,
         border: const Border(
           top: BorderSide(color: Color(0xFFBCBBC1), width: 0.0),
           bottom: BorderSide(color: Color(0xFFBCBBC1), width: 0.0),
@@ -265,12 +265,10 @@ class _CupertinoPickerDemoState extends State<CupertinoPickerDemo> {
 //          previousPageTitle: 'Cupertino'
 //          ),
           child: DefaultTextStyle(
-          style: CupertinoTheme.of(context).textTheme.textStyle,
+          style: TextStyle(),
           child: DecoratedBox(
           decoration: BoxDecoration(
-          color: CupertinoTheme.of(context).brightness == Brightness.light
-          ? CupertinoColors.extraLightBackgroundGray
-              : CupertinoColors.darkBackgroundGray,
+          color: CupertinoColors.inactiveGray
           ),
           child: ListView(
             children: <Widget>[