be single

src/main.cpp

@@ -8,6 +8,12 @@ int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);
     initUkuiLog4qt("kylin-theme-builder");
+    static QSharedMemory *singleApp = new QSharedMemory("kylin-theme-builder");
+    if(!singleApp->create(1))//创建失败
+    {
+        qApp->quit();
+        return -1;
+    }
     //翻译
     QTranslator app_trans;
     QString locale = QLocale::system().name();