fix: memory leak

mainwidget.cpp

@@ -180,7 +180,7 @@ MainWidget::MainWidget(QWidget *parent)
     CheckSerials();
 
     //开始串口进程
-    serialController = new SerialController;
+    serialController = new SerialController(this);
 
     //connect开关串口控制信号 以及是否成功的返回信号
     connect(this, &MainWidget::requestOpen, serialController, &SerialController::openSerial);

mainwindow.cpp

@@ -38,8 +38,8 @@ void MainWindow::setDateTime(QString datetime)
 
 void MainWindow::showAboutQt()
 {
-      QMessageBox *aboutQtWindow = new QMessageBox(this);
+    QMessageBox *aboutQtWindow = new QMessageBox(this);
-      aboutQtWindow->aboutQt(this);
+    aboutQtWindow->aboutQt(this);
 }
 
 void MainWindow::showAbout()