QT 5.1 MainWindow 与 QWebview 如何通信

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);
}