update doc

doc/source/handycontrol/extend_controls/coverView/index.md

@@ -1,5 +1,41 @@
 ---
-title: 建设中
+title: CoverView 封面视图
 ---
 
-建设中
+仿制Itunes的专辑视图。
+
+```cs
+public class CoverView : RegularItemsControl
+```
+
+# 属性
+
+|属性|描述|默认值|备注|
+|-|-|-|-|
+|CoverViewContentStyle|封面内容样式|||
+|ItemContentHeight|项内容高度|300||
+|ItemContentHeightFixed|项内容高度是否固定|true||
+|ItemHeaderTemplate|项标题模板|||
+|SourceContent|源内容（当前内容）|||
+|Groups|组数||||
+
+# 案例
+
+```xml
+<hc:CoverView Margin="27" Width="880" Height="432" ItemWidth="160" ItemHeight="160" ItemsSource="{Binding DataList}">
+    <hc:CoverView.ItemHeaderTemplate>
+        <DataTemplate>
+            <Image Source="{Binding ImgPath}"/>
+        </DataTemplate>
+    </hc:CoverView.ItemHeaderTemplate>
+    <hc:CoverView.ItemTemplate>
+        <DataTemplate>
+            <Border Margin="10" Height="300" Background="{Binding BackgroundToken,Converter={StaticResource String2BrushConverter}}">
+                <TextBlock Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" VerticalAlignment="Center" HorizontalAlignment="Center" Foreground="White"/>
+            </Border>
+        </DataTemplate>
+    </hc:CoverView.ItemTemplate>
+</hc:CoverView>
+```
+
+![CoverView](https://raw.githubusercontent.com/HandyOrg/HandyOrgResource/master/HandyControl/Resources/CoverView.gif)