修改限制单例运行，再次启动时拉起现有实例

src/main.cpp

@@ -89,7 +89,19 @@ int main(int argc, char *argv[])
                     )
                 );
     // 限制单实例运行
-    if (!a.setSingleInstance("spark-store")) {
+    if(!a.setSingleInstance("spark-store"))
+    {
+        qDebug() << "The application is already running!";
+        QDBusInterface iface("com.gitee.spark.store",
+                             "/com/gitee/spark/store",
+                             "com.gitee.spark.store",
+                             QDBusConnection::sessionBus());
+
+        QString arg1 = argv[1];
+
+        iface.asyncCall("activeWindow",arg1);
+
+
         return -1;
     }