正则表达式处理输入十六进制数，每隔2个数字隔开

QString SysUtils::formatHexString(constQString &hex)

{

    QString hexStr(hex);

    QRegExp rx("([0-9A-Fa-f]{1,2})");

    QStringList list;

    int pos = 0;

    while ((pos = rx.indexIn(hexStr, pos)) != -1) {

        list << rx.cap(1);

        pos += rx.matchedLength();

    }

    return list.join(" ");

}

void MainWindow::HandleText()
{

    disconnect (ui->SendtextEdit,SIGNAL(textChanged()),this,SLOT(HandleText()));

    QTextCursortextCursor=ui->SendtextEdit->textCursor();
    intrecordPos=textCursor.position();//记录光标位置
    QStringtxt=ui->SendtextEdit->toPlainText();//读取待处理字符串
    QStringtmp=txt;
    tmp=tmp.replace("","");//去掉待处理字符串空格
    QStringhexStr=SysUtils::formatHexString(tmp);
    ui->SendtextEdit->setText(hexStr);
    if(recordPos>0)
    {
        QStringch=hexStr.mid(recordPos-1,1);
        qDebug()<<ch;
        if(ch=="")
            recordPos++;
    }
    textCursor.setPosition(recordPos);
    ui->SendtextEdit->setTextCursor(textCursor);
    connect (ui->SendtextEdit,SIGNAL(textChanged()),this,SLOT(HandleText()));
}