QT char to qstring hexadecimal and char to hexadecimal integer

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Qt Character conversion

Qt char Type conversion QString type 16 Base and char type turn 16 Decimal integer

Remove the characters Qstring Unwanted characters in string

The code is as follows （ Example ）：

void Widget::parseData(QString &str1)
{
    
    char array[]={
    'f',':'}; // Characters to be removed  f、：、
    int length = sizeof (array)/sizeof (char);
    for(int i=0;i<length;i++)
    {
    
        QString tmp = QString(array[i]);
        if(str1.contains(tmp))
        {
    
           str1 =str1.replace(tmp,"");
        }
    }
}

char turn Qstring 16 Base number

The code is as follows （ Example ）：

QString Widget::Byte_16(uchar *Data,int iLength)      // Input  uchar  type   character string , return  QString  type  16 Base number   character string .
 {
    
    QString ST="",strT;
    int iB,iS;
    char cB,cS;

    //---
    for (int i=0;i<iLength;i++)
    {
    
       iB = *(Data+i)/16;
       if (iB>=10)
       {
    
          cB = 'A' + (iB-10);
       }
       else
          cB = '0' + iB;

       iS = *(Data+i)%16;
       if (iS >= 10)
       {
    
          cS = 'A' + (iS-10);
       }
       else
          cS = '0' + iS;
       strT=QString("%1%2 ").arg(cB).arg(cS);
       ST += strT;
    }
    return ST;
}

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QlineEdit obtain QString String rotation 16 Binary integer

The code is as follows （ Example ）：

        QString  g_str =g_edit_4->text();
        bool ok;
        int length = g_str.size()/3+1;   // String division 3 Length of bytes after , Get three at a time 
        uchar  array[length];

        for(int i = 0; i<=length; i++)
        {
    


              array[i] =  (uchar) g_str.mid(i*3,2).toUInt(&ok,16);  //mid  Every three   Get two 


        }
        char *p = (char *)array;   // Use a pointer to point to an integer , So as to achieve   use char  type   Output integer 16 Base number 
        g_sender->writeDatagram(p,QHostAddress(g_ip),g_port);