Tabs

Tabs

Signature

<Tabs Default="0">
  <TabItem Title="页签 1">...</TabItem>
  <TabItem Title="页签 2">...</TabItem>
</Tabs>

Attributes

TabItem

<TabItem Title="快捷入口">
  <Grid Columns="2" Gap="2">
    <Button Text="启动" OnClick="Launch" />
    <Button Text="实例" OnClick="Navigate" To="Instances" />
  </Grid>
</TabItem>

Runtime behavior

• The tab bar is rendered with the launcher’s built-in Tabs component.
• The selected index lives in component memory and is not persisted; remounting returns to Default.
• All TabItems are parsed; Data is fetched globally up front, so switching tabs does not refetch.
• Tab titles support bindings such as {Resources.*} / {Data.*}.

Example

<Tabs Default="0">
  <TabItem Title="公告">
    <Text Value="{Data.Announcement}" />
  </TabItem>
  <TabItem Title="统计">
    <Text Value="{Data.Online}" />
  </TabItem>
</Tabs>

Gotchas

• Other nodes cannot go directly inside Tabs; they must be wrapped in a TabItem.
• At least one TabItem is required; an out-of-range Default fails parsing.
• Content in hidden tabs still mounts and runs Loaded/Timer triggers; use If inside the TabItem when you need lazy loading.