Merge branch 'test' of https://github.com/efoxTeam/flutter-ui into dev-ken

Author: ckken

docs/widget/form/daypicker/index.md

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+## ****

docs/widget/form/form/index.md

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+## ****

docs/widget/form/formfield/index.md

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+## ****

docs/widget/form/radio/index.md

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+## ****

docs/widget/form/rawkeyboard/index.md

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+## ****

docs/widget/form/slider/index.md

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+## **Slider**
+
+>
+Silder用来选择连续性的或者非连续性的数据
+
+### 构造方法
+``` dart
+Slider({
+  Key key,
+  @required this.value,
+  @required this.onChanged,
+  this.onChangeStart,
+  this.onChangeEnd,
+  this.min = 0.0,
+  this.max = 1.0,
+  this.divisions,
+  this.label,
+  this.activeColor,
+  this.inactiveColor,
+  this.semanticFormatterCallback,
+})
+```
+
+### 属性介绍
+* value：Silder当前值
+* onChanged：滑块状态发生变化时进行回调
+* onChangeStart：滑块状态刚发生变化时的回调
+* onChangeEnd：滑块状态变化结束时的回调
+* min：用户可以选择的最小值
+* max：用户可以选择的最大值
+* divisions：将silder划分为几份
+* label：滑块处于活动状态时显示在滑块上方的标签
+* activeColor：用于滑块轨道中活动部分的颜色
+* inactiveColor：滑块轨道的非活动部分的颜色
+

docs/widget/form/switch/index.md

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+## ****

docs/widget/form/textfield/index.md

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+## ****

docs/widget/form/textinput/index.md

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+## ****

lib/widget/form/daypicker/demo.dart

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+import 'package:flutter/material.dart';
+
+class Index extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => _IndexState();
+}
+
+class _IndexState extends State<Index> {
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('DayPicker'),
+      ),
+      body: Center(
+        child: Text('更新中'),
+      ),
+    );
+  }
+}