1、每两个字符加一个空格
QString MainWindow::AddSpaceToStr(QString source_str)
{
QString result_str = "";//返回带有空格的字符串
int source_str_length = source_str.length();
for(int i=0;i<source_str_length;i++)
{
result_str += source_str.mid(i,2);
result_str += " ";
i++;
}
return result_str;
}
2、将QString转化到QByteArray里面//此方法不适用，其实有更好的方法
QByteArray MainWindow::StrToHex(QString packet_str,QByteArray dataArray)
{
int dataCount = 0;//字节数组地址
int packetLength = packet_str.length();//发送内容的字符数
int dataLength = 0;//字节数组的长度
dataLength = packetLength/2;//字符数除以2
if(packetLength%2 != 0)//如果为奇数
dataLength++;
dataArray.resize(dataLength);//设置字节数组的长度
QString tempStr = "";
for(int i=0;i<packetLength;i++)//通过此循环将发送内容每两个字符转化为一个字节十六进制,存在字节数组里面
{
bool ok;
tempStr = packet_str.mid(i,2);
dataArray[dataCount++] = (uchar)tempStr.toInt(&ok,16);
i++;
}
return dataArray;
}
QString dataStr = ui->textEdit->toPlainText();
dataStr = dataStr.replace(" ","");
QByteArray ba = QByteArray::fromHex(dataStr.toLatin1());
3、QString转const char
#include <iostream>//需要使用std
QString tempFileName;std::string str = tempFileName.toStdString();//标准库的string
const char* ch = str.c_str();//ch就是const char
4、获取时间格式：年-月-日-时-分-秒
QTime currentTime = QTime::currentTime();
QString timeStr = "--->" + QString::number(currentDate.year()) + "-";//年
timeStr += QString::number(currentDate.month()) + "-";//月
timeStr += QString::number(currentDate.day()) + "-";//日
timeStr += QString::number(currentTime.hour()) + "-";//时
timeStr += QString::number(currentTime.minute()) + "-";//分
timeStr += QString::number(currentTime.second());//秒
QDateTime current_date_time = QDateTime::currentDateTime();
QString current_date = current_date_time.toString("yyyy-MM-dd");
QString current_time = current_date_time.toString("hh:mm:ss.zzz ");
5、字符数组转十六进制字符串char{0x00,0x01}->QString(00 01)
QString MyMethod::uchar2Str(uchar *sourceChar, int length)
{
QByteArray ba;ba.resize(length);
memcpy(ba.data(),sourceChar,length);
QString resultStr = ba.toHex();
resultStr = MyMethod::formatStr(resultStr);
return resultStr;
}
6、打印CAN错误码
void MainWindow::printCanErrCode()
{
QString tempStr;
VCI_ERR_INFO err_info;
VCI_ReadErrInfo(this->DevType,this->DevIndex,this->CanIndex,&err_info);
tempStr = QString::number(err_info.ErrCode);
QMessageBox::warning(this,"打开设备","操作失败\n错误代码:"+tempStr);
}
7、设置本地的QSS文件
QString MainWindow::getQssContent()
{
QFile styleSheet("F:\\QtSpace\\MyCanTest\\test.txt");
if (!styleSheet.open(QIODevice::ReadOnly))
{
qDebug()<<"Can't open the style sheet file.";
return "";
}
return styleSheet.readAll();
}
8、根据5个串口配置combobox，获取串口配置结构体
1）、串口配置结构体定义
typedef struct
{
QString portName;//串口号
QSerialPort::BaudRate baudRate;//波特率
QSerialPort::DataBits dataBits;//数据位
QSerialPort::Parity parity;//校验位
QSerialPort::StopBits stopBites;//停止位
}SerialportInfo;
2）、根据5个combobox返回此结构体
SerialportInfo MainWindow::getSerialportInfo(QComboBox* cb1,QComboBox* cb2,QComboBox* cb3,QComboBox* cb4,QComboBox* cb5)
{
SerialportInfo serialPortInfo;
/*串口名字*/
serialPortInfo.portName = cb1->currentText();//串口名字
/*波特率*/
if("1200"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud1200;
}
else if("2400"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud2400;
}
else if("4800"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud4800;
}
else if("9600"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud9600;
}
else if("19200"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud19200;
}
else if("38400"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud38400;
}
else if("57600"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud57600;
}
else if("115200"==cb2->currentText())
{
serialPortInfo.baudRate = QSerialPort::Baud115200;
}
/*数据位*/
if(0==cb3->currentIndex())
{
serialPortInfo.dataBits = QSerialPort::Data8;
}
else if(1==cb3->currentIndex())
{
serialPortInfo.dataBits = QSerialPort::Data7;
}
else if(2==cb3->currentIndex())
{
serialPortInfo.dataBits = QSerialPort::Data6;
}
else if(3==cb3->currentIndex())
{
serialPortInfo.dataBits = QSerialPort::Data5;
}
/*校验位*/
if("NONE"==cb4->currentText())
{
serialPortInfo.parity = QSerialPort::NoParity;
}
else if("ODD"==cb4->currentText())
{
serialPortInfo.parity = QSerialPort::OddParity;
}
else if("EVEN"==cb4->currentText())
{
serialPortInfo.parity = QSerialPort::EvenParity;
}
else if("MARK"==cb4->currentText())
{
serialPortInfo.parity = QSerialPort::MarkParity;
}
else if("SPACE"==cb4->currentText())
{
serialPortInfo.parity = QSerialPort::SpaceParity;
}
/*停止位*/
if(0==cb5->currentIndex())
{
serialPortInfo.stopBites = QSerialPort::OneStop;
}
else if(1==cb5->currentIndex())
{
serialPortInfo.stopBites = QSerialPort::OneAndHalfStop;
}
else if(2==cb5->currentIndex())
{
serialPortInfo.stopBites = QSerialPort::TwoStop;
}
return serialPortInfo;
}
9、QString("FF")转BYTE(FF)
BYTE MyMethod::hexToByte(QString info)
{
return (BYTE)info.toUInt(NULL,16);
}