diff --git a/frame/controller/dockitemcontroller.cpp b/frame/controller/dockitemcontroller.cpp
index c9b147d3d..e5823e458 100644
--- a/frame/controller/dockitemcontroller.cpp
+++ b/frame/controller/dockitemcontroller.cpp
@@ -38,11 +38,6 @@ DockItemController *DockItemController::instance(QObject *parent)
     return INSTANCE;
 }
 
-DockItemController::~DockItemController()
-{
-    qDeleteAll(m_itemList);
-}
-
 const QList<DockItem *> DockItemController::itemList() const
 {
     return m_itemList;
@@ -274,8 +269,8 @@ void DockItemController::appItemRemoved(const QString &appId)
 void DockItemController::appItemRemoved(AppItem *appItem)
 {
     emit itemRemoved(appItem);
-    appItem->deleteLater();
     m_itemList.removeOne(appItem);
+    appItem->deleteLater();
 }
 
 void DockItemController::pluginItemInserted(PluginsItem *item)
diff --git a/frame/controller/dockitemcontroller.h b/frame/controller/dockitemcontroller.h
index 6dcaeefbd..350289821 100644
--- a/frame/controller/dockitemcontroller.h
+++ b/frame/controller/dockitemcontroller.h
@@ -39,7 +39,6 @@ class DockItemController : public QObject
 
 public:
     static DockItemController *instance(QObject *parent);
-    ~DockItemController();
 
     const QList<DockItem *> itemList() const;
     const QList<PluginsItemInterface *> pluginList() const;
diff --git a/frame/controller/dockpluginscontroller.cpp b/frame/controller/dockpluginscontroller.cpp
index ba190698f..dcc624bb8 100644
--- a/frame/controller/dockpluginscontroller.cpp
+++ b/frame/controller/dockpluginscontroller.cpp
@@ -38,10 +38,6 @@ DockPluginsController::DockPluginsController(DockItemController *itemControllerI
     QTimer::singleShot(1, this, &DockPluginsController::startLoader);
 }
 
-DockPluginsController::~DockPluginsController()
-{
-}
-
 void DockPluginsController::itemAdded(PluginsItemInterface * const itemInter, const QString &itemKey)
 {
     // check if same item added
@@ -80,7 +76,7 @@ void DockPluginsController::itemRemoved(PluginsItemInterface * const itemInter,
     emit pluginItemRemoved(item);
 
     m_pluginList[itemInter].remove(itemKey);
-    QTimer::singleShot(1, item, &PluginsItem::deleteLater);
+    item->deleteLater();
 }
 
 //void DockPluginsController::requestRefershWindowVisible()
@@ -138,7 +134,7 @@ void DockPluginsController::positionChanged()
 
 void DockPluginsController::loadPlugin(const QString &pluginFile)
 {
-    QPluginLoader *pluginLoader = new QPluginLoader(pluginFile, this);
+    QPluginLoader *pluginLoader = new QPluginLoader(pluginFile);
     const auto meta = pluginLoader->metaData().value("MetaData").toObject();
     if (!meta.contains("api") || meta["api"].toString() != API_VERSION)
     {
diff --git a/frame/controller/dockpluginscontroller.h b/frame/controller/dockpluginscontroller.h
index ede0d3ba5..221a34b38 100644
--- a/frame/controller/dockpluginscontroller.h
+++ b/frame/controller/dockpluginscontroller.h
@@ -39,7 +39,6 @@ class DockPluginsController : public QObject, PluginProxyInterface
 
 public:
     explicit DockPluginsController(DockItemController *itemControllerInter = 0);
-    ~DockPluginsController();
 
     // implements PluginProxyInterface
     void itemAdded(PluginsItemInterface * const itemInter, const QString &itemKey);
diff --git a/frame/item/dockitem.cpp b/frame/item/dockitem.cpp
index bba1adedf..f90bddea7 100644
--- a/frame/item/dockitem.cpp
+++ b/frame/item/dockitem.cpp
@@ -28,7 +28,7 @@
 
 Position DockItem::DockPosition = Position::Top;
 DisplayMode DockItem::DockDisplayMode = DisplayMode::Efficient;
-std::unique_ptr<DockPopupWindow> DockItem::PopupWindow(nullptr);
+QPointer<DockPopupWindow> DockItem::PopupWindow(nullptr);
 
 DockItem::DockItem(QWidget *parent)
     : QWidget(parent),
@@ -40,7 +40,7 @@ DockItem::DockItem(QWidget *parent)
 
       m_menuManagerInter(new DBusMenuManager(this))
 {
-    if (!PopupWindow.get())
+    if (PopupWindow.isNull())
     {
         DockPopupWindow *arrowRectangle = new DockPopupWindow(nullptr);
         arrowRectangle->setShadowBlurRadius(20);
@@ -51,7 +51,7 @@ DockItem::DockItem(QWidget *parent)
         arrowRectangle->setShadowXOffset(0);
         arrowRectangle->setArrowWidth(18);
         arrowRectangle->setArrowHeight(10);
-        PopupWindow.reset(arrowRectangle);
+        PopupWindow = arrowRectangle;
     }
 
     m_popupTipsDelayTimer->setInterval(500);
@@ -215,7 +215,7 @@ void DockItem::showPopupWindow(QWidget * const content, const bool model)
     if (model)
         emit requestWindowAutoHide(false);
 
-    DockPopupWindow *popup = PopupWindow.get();
+    DockPopupWindow *popup = PopupWindow.data();
     QWidget *lastContent = popup->getContent();
     if (lastContent)
         lastContent->setVisible(false);
@@ -244,7 +244,7 @@ void DockItem::popupWindowAccept()
     if (!PopupWindow->isVisible())
         return;
 
-    disconnect(PopupWindow.get(), &DockPopupWindow::accept, this, &DockItem::popupWindowAccept);
+    disconnect(PopupWindow.data(), &DockPopupWindow::accept, this, &DockItem::popupWindowAccept);
 
     hidePopup();
 
diff --git a/frame/item/dockitem.h b/frame/item/dockitem.h
index ea79f1d4b..5705629a7 100644
--- a/frame/item/dockitem.h
+++ b/frame/item/dockitem.h
@@ -100,7 +100,7 @@ protected:
 
     static Position DockPosition;
     static DisplayMode DockDisplayMode;
-    static std::unique_ptr<DockPopupWindow> PopupWindow;
+    static QPointer<DockPopupWindow> PopupWindow;
 };
 
 #endif // DOCKITEM_H
diff --git a/plugins/datetime/datetimeplugin.cpp b/plugins/datetime/datetimeplugin.cpp
index e75fe28f7..4f435d048 100644
--- a/plugins/datetime/datetimeplugin.cpp
+++ b/plugins/datetime/datetimeplugin.cpp
@@ -45,12 +45,6 @@ DatetimePlugin::DatetimePlugin(QObject *parent)
     connect(m_refershTimer, &QTimer::timeout, this, &DatetimePlugin::updateCurrentTimeString);
 }
 
-DatetimePlugin::~DatetimePlugin()
-{
-    delete m_centralWidget;
-    delete m_dateTipsLabel;
-}
-
 const QString DatetimePlugin::pluginName() const
 {
     return "datetime";
diff --git a/plugins/datetime/datetimeplugin.h b/plugins/datetime/datetimeplugin.h
index 04d3ad266..356dedc79 100644
--- a/plugins/datetime/datetimeplugin.h
+++ b/plugins/datetime/datetimeplugin.h
@@ -36,7 +36,6 @@ class DatetimePlugin : public QObject, PluginsItemInterface
 
 public:
     explicit DatetimePlugin(QObject *parent = 0);
-    ~DatetimePlugin();
 
     const QString pluginName() const override;
     const QString pluginDisplayName() const override;
@@ -60,8 +59,8 @@ private slots:
     void updateCurrentTimeString();
 
 private:
-    DatetimeWidget *m_centralWidget;
-    QLabel *m_dateTipsLabel;
+    QPointer<DatetimeWidget> m_centralWidget;
+    QPointer<QLabel> m_dateTipsLabel;
 
     QTimer *m_refershTimer;