qt 记事本保存和关闭功能

保存功能

void Widget::on_btnSave_clicked()
{
    QString fileName = QFileDialog::getSaveFileName(this, tr("SaveFile"),
                                                    "D:/untitled.txt",
                                                    tr("Text (*.txt*.doc)"));
    file.setFileName(fileName);
    if(!file.open(QIODevice::WriteOnly | QIODevice::Text)){
        qDebug() << "file open error";
    }
    QTextStream out(&file);
    out.setCodec("UTF-8");
    QString context = ui->textEdit->toPlainText();
    out << context;
}

关闭功能

void Widget::on_btnClose_clicked()
{
    ui->textEdit->clear();
    if(file.isOpen())
    {
        file.close();
    }
}