QFile file(":/file/UserAgreement.html");

    if(!file.open(QFile::ReadOnly | QFile::Text))

        QMessageBox::information(NULL, QStringLiteral("提示"),

                                 QStringLiteral("打不开用户协议文件"));

    QTextStream textStream(&file);

    ui->textBrowser->setHtml(textStream.readAll());