面板支持热更：视图里挂稳定容器（编辑器类加载器建的 Table），面板内容放在容器里；后台线程轮询 build/classes/com/spineview/ObjectPanel.class 的 mtime，一变就用新的子类加载器重建内容换进容器 —— 改完代码只需 build.sh，编辑器不用重启、场景与选择状态保留

viewpanel/src/com/spineview/ViewInstaller.java

@@ -70,11 +70,19 @@ public final class ViewInstaller {
         System.err.println("[view] 找不到 Skin");
         return false;
       }
+      // 视图里挂的是**稳定容器**（由编辑器类加载器建），面板内容放在它里面：
+      // 这样热更时只要换容器里的内容，编辑器不用重启、场景与选择状态都保留。
+      Class<?> tableClass = Class.forName("et", true, loader);
+      Object holder = tableClass.getConstructor().newInstance();
+      callStatic(tableClass, Obf.TABLE_SET_FILL_PARENT, new Class<?>[] {boolean.class}, holder,
+          Boolean.TRUE);
       Object panel = buildPanel(loader, skin);
+      addChild(tableClass, holder, panel);
+      startHotReload(loader, skin, holder);
       for (Field field : viewEnum.getDeclaredFields()) {
         if (!field.getType().getName().equals(ACTOR)) continue;
         field.setAccessible(true);
-        field.set(view, panel);
+        field.set(view, holder);
         System.err.println("[view] 已把 Spine View 面板挂到视图 " + view);
         showView(loader, view);
         return true;
@@ -113,6 +121,91 @@ public final class ViewInstaller {
     }
   }
 
+  /** 调一个"静态/实例"都行的方法：这里用来调 Table.setFillParent（实例方法）。 */
+  private static void callStatic(Class<?> owner, String name, Class<?>[] parameterTypes,
+      Object receiver, Object... arguments) throws Exception {
+    for (Method method : owner.getMethods()) {
+      if (!method.getName().equals(name)) continue;
+      if (!java.util.Arrays.equals(method.getParameterTypes(), parameterTypes)) continue;
+      method.setAccessible(true);
+      method.invoke(receiver, arguments);
+      return;
+    }
+    throw new NoSuchMethodException(owner.getName() + "." + name);
+  }
+
+  /** 往容器里加 Actor（Table.add(Actor)）。 */
+  private static void addChild(Class<?> tableClass, Object table, Object actor) throws Exception {
+    for (Method method : tableClass.getMethods()) {
+      Class<?>[] types = method.getParameterTypes();
+      if (types.length != 1) continue;
+      if (!types[0].isAssignableFrom(actor.getClass())) continue;
+      if (method.getReturnType() == void.class) continue;
+      method.setAccessible(true);
+      method.invoke(table, actor);
+      return;
+    }
+    throw new NoSuchMethodException("找不到 add(Actor)");
+  }
+
+  /** 清空容器（Table.clearChildren()）。 */
+  private static void clearChildren(Class<?> tableClass, Object table) throws Exception {
+    for (Method method : tableClass.getMethods()) {
+      if (!method.getName().equals(Obf.TABLE_CLEAR_CHILDREN)) continue;
+      if (method.getParameterTypes().length != 0) continue;
+      method.setAccessible(true);
+      method.invoke(table);
+      return;
+    }
+    throw new NoSuchMethodException("找不到 clearChildren()");
+  }
+
+  /**
+   * 热更：轮询 `viewpanel/build/classes/com/spineview/ObjectPanel.class` 的修改时间，
+   * 一变就用**新的子类加载器**（parent = 编辑器加载器）重建面板内容，换进稳定容器里。
+   * 这样改完代码只要 `./viewpanel/build.sh`，编辑器不用重启。
+   */
+  private static void startHotReload(final ClassLoader loader, final Object skin,
+      final Object holder) {
+    final String classesDir = System.getProperty("spine.classes");
+    if (classesDir == null) {
+      System.err.println("[view] 没有 -Dspine.classes，热更关闭");
+      return;
+    }
+    final java.io.File marker = new java.io.File(classesDir, "com/spineview/ObjectPanel.class");
+    final long[] lastSeen = new long[] {marker.lastModified()};
+    Thread thread = new Thread(new Runnable() {
+      @Override
+      public void run() {
+        while (true) {
+          try {
+            Thread.sleep(1000);
+            long stamp = marker.lastModified();
+            if (stamp == lastSeen[0] || stamp == 0) continue;
+            lastSeen[0] = stamp;
+            Thread.sleep(400);                      // 等编译落盘
+            java.net.URL classesUrl = new java.io.File(classesDir).toURI().toURL();
+            java.net.URLClassLoader child = new java.net.URLClassLoader(
+                new java.net.URL[] {classesUrl}, loader);
+            Class<?> panelClass = Class.forName("com.spineview.ObjectPanel", true, child);
+            Object fresh = panelClass.getMethod("build", ClassLoader.class, Object.class)
+                .invoke(null, child, skin);
+            Class<?> tableClass = Class.forName("et", true, loader);
+            clearChildren(tableClass, holder);
+            addChild(tableClass, holder, fresh);
+            System.err.println("[view] 热更完成：面板已用新的类加载器重建（未重启编辑器）");
+          } catch (InterruptedException ignored) {
+            return;
+          } catch (Throwable error) {
+            System.err.println("[view] 热更失败: " + error);
+          }
+        }
+      }
+    }, "spineview-hot-reload");
+    thread.setDaemon(true);
+    thread.start();
+  }
+
   /** Skin 挂在 OG 的静态字段上（字节码里 OG 有 LSkin;D）。 */
   private static Object findSkin(ClassLoader loader) throws Exception {
     Class<?> holder = Class.forName("OG", true, loader);