解决它们之间的通信问题，需要在mainwindow中添加

ui->webView->settings()->setAttribute(QWebSettings::JavascriptEnabled, true);    connect(ui->webView->page()->mainFrame(),SIGNAL(javaScriptWindowObjectCleared()),this,SLOT(addJavaScriptObject()));void MainWindow::addJavaScriptObject(){     ui->webView->page()->mainFrame()->addToJavaScriptWindowObject("MainWindow",this);}