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Assets/Test/TestUI.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UIElements;
+using MuHua;
+
+public class TestUI : MonoBehaviour
+{
+    /// <summary> 绑定文档 </summary>
+    public UIDocument document;
+    /// <summary> 根目录文档 </summary>
+    public VisualElement root => document.rootVisualElement;
+
+    private UIScrollerHorizontal scroller;
+    private void Awake()
+    {
+        VisualElement Scroller = root.Q<VisualElement>();
+        scroller = new UIScrollerHorizontal(Scroller, root);
+    }
+}

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Assets/Test/TestUI.uxml

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+<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements" xsi="http://www.w3.org/2001/XMLSchema-instance" engine="UnityEngine.UIElements" editor="UnityEditor.UIElements" noNamespaceSchemaLocation="../../UIElementsSchema/UIElements.xsd" editor-extension-mode="False">
+    <ui:VisualElement name="ScrollerHorizontal" class="scroller-horizontal" style="width: 300px; position: absolute; left: 50px; top: 50px;">
+        <ui:VisualElement name="Dragger" class="scroller-horizontal-dragger" />
+    </ui:VisualElement>
+</ui:UXML>

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