直接上代碼，看代碼你們就懂了
1、16進制QString轉QByteArray
1 QString str = "01 a5 1e 02"; 2 QByteArray tmpBy; 3 StringToHex(str, tmpBy); 4 5 void MainWindow::StringToHex(QString str, QByteArray &senddata) 6 { 7 int hexdata,lowhexdata; 8 int hexdatalen = 0; 9 int len = str.length(); 10 senddata.resize(len/2); 11 char lstr,hstr; 12 for(int i=0; i<len; ) 13 { 14 //char lstr, 15 hstr=str[i].toLatin1(); 16 if(hstr == ' ') 17 { 18 i++; 19 continue; 20 } 21 i++; 22 if(i >= len) 23 break; 24 lstr = str[i].toLatin1(); 25 hexdata = ConvertHexChar(hstr); 26 lowhexdata = ConvertHexChar(lstr); 27 if((hexdata == 16) || (lowhexdata == 16)) 28 break; 29 else 30 hexdata = hexdata*16+lowhexdata; 31 i++; 32 senddata[hexdatalen] = (char)hexdata; 33 hexdatalen++; 34 } 35 senddata.resize(hexdatalen); 36 } 37 38 char MainWindow::ConvertHexChar(char ch) 39 { 40 if((ch >= '0') && (ch <= '9')) 41 return ch-0x30; 42 else if((ch >= 'A') && (ch <= 'F')) 43 return ch-'A'+10; 44 else if((ch >= 'a') && (ch <= 'f')) 45 return ch-'a'+10; 46 else return ch-ch;//不在0-f范圍內的會發送成0 47 }
2、qint8(signed char)轉16進制字符串
1 QDataStream out(&requestData,QIODevice::ReadWrite); //將字節數組讀入 2 QString strReceive; 3 int index = 0; 4 while(!out.atEnd()) 5 { 6 qint8 outChar = 0; 7 out>>outChar; //每字節填充一次，直到結束 8 //十六進制的轉換 9 QString str = QString("%1").arg(outChar & 0xFF,2,16,QLatin1Char('0')); 10 strReceive.append(str); 11 }
3、這塊我主要是用在串口通信這里了，看自己實際情況吧