fix crash of closing

src/app/Application.cpp

@@ -48,6 +48,10 @@ void Application::OnTimeout() {
 }
 
 void Application::Uninit() {
+    // Stop the app-level frame timer to prevent callbacks during teardown
+    if (timer_.isActive()) {
+        timer_.stop();
+    }
     //Singleton<PythonModule>::Destory();
     Singleton<NetDriver>::Destory();
     Singleton<PresetModelConfigParser>::Destory();

src/entities/EntitiesManager.cpp

@@ -32,7 +32,8 @@ void EntitiesManager::OnDestory() {
     );
     for (auto* entity : entities) {
         RemoveEntity(entity);
-        entity->deleteLater();
+        // Delete entities immediately to release scene graph resources before exit
+        delete entity;
     }
 }
 

src/scene/OEScene.cpp

@@ -55,7 +55,24 @@ void OEScene::AttachView(osgViewer::View* view) {
 }
 
 void OEScene::DetachView(osgViewer::View* view) {
+    if (!view) return;
+
+    // Remove sky dome from this group if present; SkyNode has no detach in osgEarth 2.8
+    if (skyDome_.valid()) {
+        removeChild(skyDome_.get());
+        skyDome_ = nullptr;
+    }
+
+    // Clear scene data
     view->setSceneData(nullptr);
+
+    // Clear manipulator association
+    if (earthManipulator_.valid()) {
+        view->setCameraManipulator(nullptr);
+    }
+
+    // Clear internal view pointer
+    curentView_ = nullptr;
 }
 
 bool OEScene::AddToScene(osg::Node* node) const {

src/viewer/OsgWidget.cpp

@@ -1,4 +1,4 @@
-#include "viewer/OsgWidget.h"
+#include "viewer/OsgWidget.h"
 
 
 #include <QWindow>
@@ -69,13 +69,20 @@ OsgWidget::OsgWidget(QWidget* parent, Qt::WindowFlags f)
 
 OsgWidget::~OsgWidget() {
     LOG_INFO("OsgWidget::~OsgWidget");
+    // Stop periodic updates to prevent callbacks during teardown
+    if (timer_.isActive()) {
+        timer_.stop();
+    }
+
+    // First unload the workspace while scene/view are still valid,
+    // so entities can detach cleanly from the scene graph
     if (nullptr != workspace_) {
         workspace_->Unlaod();
+        workspace_ = nullptr;
     }
-    if (nullptr != viewUI_) {
+
-		viewUI_->RemoveUI(activeScene_->GetOrCreateSceneUI());
+    // Then perform the viewer teardown (detach UI, view, and scene)
-        viewUI_ = nullptr;
+    Uninitialize();
-    }
 }
 
 void OsgWidget::Initialize() {

src/workspace/WorkSpaceManager.cpp

@@ -21,6 +21,16 @@ WorkSpaceManager::~WorkSpaceManager() {
 
 void WorkSpaceManager::OnDestory() {
     SaveDefaultWorkspace();
+    for (auto& kv : workSpaces_) {
+        WorkSpace* ws = kv.second;
+        if (ws) {
+            ws->Unlaod();
+            ws->deleteLater();
+        }
+    }
+    workSpaces_.clear();
+
+    scene_ = nullptr;
 }
 
 WorkSpace* WorkSpaceManager::LoadDefaultWorkspace(class OEScene* secen) {