QT textEdit十六進制的讀取和顯示

    QString input_data = ui->textEdit->toPlainText();
    
    /// 將QT textEdit的十六進制轉換成字符串
    int len = 0;
    unsigned char convert_data[1024] = {'\0'};
    for (int i = 0; i < input_data.length(); i++)
    {
        unsigned char high_value = 0;
        unsigned char low_value = 0;
        if (input_data.toLocal8Bit().data()[i] >= 'A')
        {
            high_value = input_data.toLocal8Bit().data()[i] - 'A' + 10;
        }
        else
        {
            high_value = input_data.toLocal8Bit().data()[i] - '0';
        }

        if (input_data.toLocal8Bit().data()[i + 1] >= 'A')
        {
            low_value = input_data.toLocal8Bit().data()[i + 1] - 'A' + 10;
        }
        else
        {
            low_value = input_data.toLocal8Bit().data()[i + 1] - '0';
        }

        unsigned char data = high_value * 16 + low_value;
        convert_data[len++] = data;

        i++;
        if (i + 2 < input_data.length())
        {
            i += 1;
        }
    }

    /// 將字符轉換成字符形式的十六進制顯示出來
    unsigned char high_hex;
    unsigned char low_hex;
    for (int i = 0; i < convert_len; i++)
    {
        high_hex = convert_data[i] >> 4;
        low_hex  = convert_data[i] & 0x0F;
        if (high_hex > 9)
        {
            high_hex = high_hex + '0' + 7;
        }
        else
        {
            high_hex = high_hex + '0';
        }

        if(low_hex > 9)
        {
            low_hex = low_hex + '0' + 7;
        }
        else
        {
            low_hex = low_hex + '0';
        }

        frame += high_hex;
        frame += low_hex;
        frame += " ";

    }
    
    ui->textEdit_3->setPlainText(frame);