diff --git a/TTKCommon/TTKLibrary/ttkdesktopwrapper.cpp b/TTKCommon/TTKLibrary/ttkdesktopwrapper.cpp
index e6a4a75..9f6f27f 100644
--- a/TTKCommon/TTKLibrary/ttkdesktopwrapper.cpp
+++ b/TTKCommon/TTKLibrary/ttkdesktopwrapper.cpp
@@ -9,7 +9,7 @@
 QRect TTKDesktopWrapper::screenGeometry(int index)
 {
 #if TTK_QT_VERSION_CHECK(5,0,0)
-    const QList<QScreen *> &screens = QApplication::screens();
+    const QList<QScreen*> &screens = QApplication::screens();
     return (index < 0 || index >= screens.count()) ? QRect() : screens[index]->geometry();
 #else
     QDesktopWidget *widget = QApplication::desktop();
@@ -20,7 +20,7 @@ QRect TTKDesktopWrapper::screenGeometry(int index)
 QRect TTKDesktopWrapper::geometry()
 {
 #if TTK_QT_VERSION_CHECK(5,0,0)
-    const QList<QScreen *> &screens = QApplication::screens();
+    const QList<QScreen*> &screens = QApplication::screens();
     QRegion virtualGeometry;
     for(int i = 0; i < screens.count(); ++i)
     {
diff --git a/TTKCommon/TTKLibrary/ttksuperenum.cpp b/TTKCommon/TTKLibrary/ttksuperenum.cpp
index 847a4b0..2f64298 100644
--- a/TTKCommon/TTKLibrary/ttksuperenum.cpp
+++ b/TTKCommon/TTKLibrary/ttksuperenum.cpp
@@ -40,11 +40,11 @@ int TTKSuperEnum::stringToKey(const QString &name) const
         return TTKSuperEnum::Null;
     }
 
-    for(auto itr = m_enumValue.begin(); itr != m_enumValue.end(); ++itr)
+    for(auto it = m_enumValue.begin(); it != m_enumValue.end(); ++it)
     {
-        if(itr->second == name)
+        if(it->second == name)
         {
-            return itr->first;
+            return it->first;
         }
     }
     return TTKSuperEnum::Null;
diff --git a/TTKModule/TTKCore/ocrCoreKits/ocrbackgroundmanager.h b/TTKModule/TTKCore/ocrCoreKits/ocrbackgroundmanager.h
index 0ec7fb6..250d10f 100644
--- a/TTKModule/TTKCore/ocrCoreKits/ocrbackgroundmanager.h
+++ b/TTKModule/TTKCore/ocrCoreKits/ocrbackgroundmanager.h
@@ -79,7 +79,7 @@ class TTK_MODULE_EXPORT OCRBackgroundManager : public QObject
 
     QColor m_skinColor;
     QStringList m_photos;
-    QList<QObject*> m_observer;
+    QObjectList m_observer;
     QString m_background;
 
     DECLARE_SINGLETON_CLASS(OCRBackgroundManager)