一、需求

将由string生成的ByteArry打印到textEdit中，指定显示的列数。

二、代码

void MainWindow::on_pushButton_convert_clicked()  
{  QString Str = ui->textEdit_string->toPlainText();  int Strszie = Str.length();  QString Showstr="";  QString hexstr = "";  int col = 20;  if(!ui->lineEdit_col->text().isEmpty())  {  col = ui->lineEdit_col->text().toInt();  }  ui->textEdit_hex->clear();  int rollcnt = (Strszie%col)?Strszie/col+1:Strszie/col;  for(int i = 0; i< rollcnt; i++)  {  for(int j = 0; j < col; j++)  {  int remaincnt = Strszie - (i*col + j);   if(remaincnt != 0)   {   hexstr.sprintf("0x%02x,",(unsigned)Str.at(i*col+j).toLatin1());  Showstr += hexstr;  }  else{  break;  }   }  ui->textEdit_hex->append(Showstr);  Showstr.clear();  }  
}