QT报错

QT报错：

1. QT Unknown module(s) in QT: serialport

sudo apt-get install libqt5serialport5 libqt5serialport5-dev

2. Project ERROR: Unknow module(s) in QT: webenginewidgets

sudo apt-get install libqt5webenginewidgets5 qtwebengine5-dev qtwebengine5-dev-tools

 3.QLayout: Attempting to add QLayout "" to MainWindow "MainWindow", which already has a layout

QMainwindow 不支持在没有中心小部件的情况下创建主窗口。您必须有一个中心小部件，即使它只是一个占位符。

QWidget *pCenterWidget = new QWidget; 
this->setCentralWidget(pCenterWidget );
pCenterWidget->setLayout(mainLayout);