选项卡视图

可以将 TabView 元素中的多个 Tab 元素分组，以创建基于选项卡的导航系统。

创建 TabView

您可以使用 UI Builder、UXML 或 C# 创建 TabView。

若要使用 C# 创建 TabView，请创建 TabView 对象的新实例，然后向其添加 Tab 元素。例如：

var tabView = new TabView("Title text");
var tab1 = new Tab("Tab 1");
var tab2 = new Tab("Tab 2");
var tab3 = new Tab("Tab 3");
tabView.Add(tab1);
tabView.Add(tab2);
tabView.Add(tab3);

使选项卡可重新排序

若要使选项卡可使用 TabView 重新排序，请将reorderable属性设置为true.

要在编辑器UI中保留TabView的Tab顺序，请分配一个唯一的view-data-key添加到 TabView 及其包含的 Tab 元素。这view-data-key存储选项卡的状态。如果您离开了view-data-key空，则重新加载文档时选项卡状态不会保留。更多信息，请参见查看数据持久性。

例子

以下UXML示例创建了带有选项卡的TabView：

<UXML xmlns="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements">
    <TabView>
       <Tab label="UXML Tab A">
           <Label text="UXML tab: This is some content for the first Tab." />
       </Tab>
       <Tab label="UXML Tab B">
           <Label text="UXML tab: This is some content for the second Tab." />
       </Tab>
    </TabView>
</UXML>

以下 C# 示例演示了 TabView 及其选项卡的一些可自定义功能：

/// <sample>
// Create a TabView with Tabs that only contains a label.
var csharpTabViewWithLabels = new TabView() { style = { marginTop = 15 } }; // marginTop not required, only for demonstration purposes.
var tabOne = new Tab("One");
tabOne.Add(new Label("Tab with labels only: This is some content for the first Tab.") { style = { marginTop = 10 } });
csharpTabViewWithLabels.Add(tabOne);
var tabTwo = new Tab("Two");
tabTwo.Add(new Label("Tab with labels only: This is some content for the second Tab.") { style = { marginTop = 10 } });
csharpTabViewWithLabels.Add(tabTwo);
container.Add(csharpTabViewWithLabels);

// Create a TabView with Tabs that only contains an icon.
var csharpTabViewWithIcons = new TabView() { style = { marginTop = 15 } }; // marginTop not required, only for demonstration purposes.
var tabIconConnect = new Tab(EditorGUIUtility.FindTexture("CloudConnect"));
tabIconConnect.Add(new Label("Tab with icons only: This is some content for the first Tab.") { style = { marginTop = 10 } });
csharpTabViewWithIcons.Add(tabIconConnect);
var tabIconStore = new Tab(EditorGUIUtility.FindTexture("Asset Store"));
tabIconStore.Add(new Label("Tab with icons only: This is some content for the second Tab.") { style = { marginTop = 10 } });
csharpTabViewWithIcons.Add(tabIconStore);
container.Add(csharpTabViewWithIcons);

// Create a TabView with Tabs that only contains an icon and a label.
var csharpTabViewWithIconsAndLabels = new TabView() { style = { marginTop = 15 } }; // marginTop not required, only for demonstration purposes.
var tabConnect = new Tab("Connect", EditorGUIUtility.FindTexture("CloudConnect"));
tabConnect.Add(new Label("Tab with an icon and a labels: This is some content for the first Tab.") { style = { marginTop = 10 } });
csharpTabViewWithIconsAndLabels.Add(tabConnect);
var tabStore = new Tab("Store", EditorGUIUtility.FindTexture("Asset Store"));
tabStore.Add(new Label("Tab with an icon and a labels: This is some content for the second Tab.") { style = { marginTop = 10 } });
csharpTabViewWithIconsAndLabels.Add(tabStore);
container.Add(csharpTabViewWithIconsAndLabels);

// Create a TabView that allows re-ordering of the tabs.
var csharpReorderableTabView = new TabView() { reorderable = true, style = { marginTop = 10 } }; // marginTop not required, only for demonstration purposes.
var tabA = new Tab("Tab A");
tabA.Add(new Label("Reorderable tabs: This is some content for Tab A") { style = { marginTop = 10 } });
csharpReorderableTabView.Add(tabA);
var tabB = new Tab("Tab B");
tabB.Add(new Label("Reorderable tabs: This is some content for Tab B") { style = { marginTop = 10 } });
csharpReorderableTabView.Add(tabB);
var tabC = new Tab("Tab C");
tabC.Add(new Label("Reorderable tabs: This is some content for Tab C") { style = { marginTop = 10 } });
csharpReorderableTabView.Add(tabC);
container.Add(csharpReorderableTabView);

// Create a TabView with closeable tabs.
var closeTabInfoLabel = new Label($"Last tab closed: None");
void UpdateLabel(string newLabel) => closeTabInfoLabel.text = $"Last tab closed: {newLabel}";
var cSharpCloseableTabs = new TabView() { style = { marginTop = 10 } }; // marginTop not required, only for demonstration purposes.
var closeableTabA = new Tab("Title A") { closeable = true };
closeableTabA.closed += (tab) => { UpdateLabel(tab.label); };
closeableTabA.Add(new Label("Closeable tabs: This is some content for Tab A") { style = { marginTop = 10 } });
cSharpCloseableTabs.Add(closeableTabA);
var closeableTabB = new Tab("Title B") { closeable = true };
closeableTabB.closed += (tab) => { UpdateLabel(tab.label); };
closeableTabB.Add(new Label("Closeable tabs: This is some content for Tab B") { style = { marginTop = 10 } });
cSharpCloseableTabs.Add(closeableTabB);
var closeableTabC = new Tab("Title C") { closeable = true };
closeableTabC.closed += (tab) => { UpdateLabel(tab.label); };
closeableTabC.Add(new Label("Closeable tabs: This is some content for Tab C") { style = { marginTop = 10 } });
cSharpCloseableTabs.Add(closeableTabC);
container.Add(cSharpCloseableTabs);
container.Add(closeTabInfoLabel);

// Create a TabView and apply custom styling to specific areas of their tabs.
var csharpCustomStyledTabView = new TabView() { style = { marginTop = 15 }, classList = { "some-styled-class" }}; // marginTop not required, only for demonstration purposes.
var customStyledTabOne = new Tab("One");
customStyledTabOne.Add(new Label("Custom styled tabs: This is some content for the first Tab."));
csharpCustomStyledTabView.Add(customStyledTabOne);
var customStyledTabTwo = new Tab("Two");
customStyledTabTwo.Add(new Label("Custom styled tabs: This is some content for the second Tab."));
csharpCustomStyledTabView.Add(customStyledTabTwo);
container.Add(csharpCustomStyledTabView);
/// </sample>

若要在 Unity 中实时试用此示例，请转到 Window > UI 工具包>示例。

有关更多示例，请参阅以下内容：

-创建选项卡式菜单。

C# 基类和命名空间

C# 类：TabView
命名空间：UnityEngine.UIElements
基类：VisualElement

成员 UXML 属性

此元素具有以下成员属性：

继承的UXML属性

此元素从其基类继承以下属性：

此元素还继承了以下属性VisualElement:

USS 级

下表列出了所有 C# 公共属性名称及其相关的 USS 选择器。

您还可以使用 Inspector 或 UI Toolkit Debugger 中的 Matching Selectors 部分来查看哪些 USS 选择器会影响VisualElement在其层次结构的各个层面。

其他资源

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