c/c++语言开发共享迅为4412——QT4开发手册

中文显示

# main.cpp ------------------------ #include <QTextCodec> QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8")); QTextCodec::setCodecForLocale(QTextCodec::codecForName("UTF-8")); QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8"));  QFont font; font.setPointSize(16); font.setFamily(("wenquanyi")); font.setBold(false); a.setFont(font); 

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setWindowFlags(Qt::FramelessWindowHint); show(); 

串口使用的第三方的库:Posix_QextSerialPort

Posix_QextSerialPort *myCom; myCom = new Posix_QextSerialPort("/dev/ttyUSB0",QextSerialBase::Polling); myCom ->open(QIODevice::ReadWrite); myCom->setBaudRate(BAUD38400); myCom->setDataBits(DATA_8); myCom->setParity(PAR_NONE); myCom->setStopBits(STOP_1); myCom->setFlowControl(FLOW_OFF); myCom->setTimeout(100); readTimer = new QTimer(this); readTimer->start(100);  connect(readTimer,SIGNAL(timeout()),this,SLOT(readMyCom()));  void TestThread::readMyCom()  { 	QByteArray temp = myCom->readAll(); 	myCom->write(temp); } 

json使用第三方库（QJson和CJson）

https://github.com/croxs-power/QJson 

#include <QJson.h> objtemp.insert("ProductKey","123"); objtemp.insert("ProductSecret","2222"); objtemp.insert("Address","1234"); qDebug()<<objtemp.format_string();#格式化为字符串 

#include <cJSON.h> QString ss="{"address":"1234","deviceState":1}" jsonRoot = cJSON_Parse(ss.toLocal8Bit().data()); Conrtrol_address = cJSON_GetObjectItem(jsonRoot, "address"); Conrtrol_deviceState = cJSON_GetObjectItem(jsonRoot, "deviceState"); Control_Device_Address=Conrtrol_address->valuestring; Control_Device_deviceState_number=Conrtrol_deviceState->valueint; 

网络请求

QNetworkAccessManager *m_network; QNetworkRequest request; QNetworkReply* reply;  m_network = new QNetworkAccessManager(this); QObject::connect(m_network, SIGNAL(finished(QNetworkReply*)),this, SLOT(replyFinished(QNetworkReply*))); request.setUrl(QUrl("https://121.199.57.139:8080/iot/UploadData")); request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/json")); SHT_Issue_reply=SHT_Issue_network->post(SHT_Issue_request,SHT_Issue_address.json_string()); 

socket请求

QTcpSocket *pTcpSocketClient; QString qStrIP = "121.199.57.139"; quint16 netport = 8989;  QObject::connect(this,SIGNAL(started()),this,SLOT(slotConnectServer())); void TestThread::slotConnectServer()    //连接服务器 {     pTcpSocketClient = new QTcpSocket(this);     pTcpSocketClient->abort();     pTcpSocketClient->connectToHost(qStrIP,netport);     connect(pTcpSocketClient,SIGNAL(readyRead()),this,SLOT(slotReadMesg())); } void TestThread::slotReadMesg() //读取信息 {         qba= pTcpSocketClient->readAll();  } 

TableView使用

QStandardItemModel *model_history; model_history= new QStandardItemModel(); model_history->setColumnCount(4); model_history->setHorizontalHeaderItem(0, new QStandardItem("DeviceID")); model_history->setHorizontalHeaderItem(1, new QStandardItem("DeviceType")); model_history->setHorizontalHeaderItem(2, new QStandardItem("SensorValues")); model_history->setHorizontalHeaderItem(3, new QStandardItem("acceptTime"));  this->ui->tableView->setModel(model_history); this->ui->tableView->setColumnWidth(0,200); this->ui->tableView->setColumnWidth(1,150); this->ui->tableView->setColumnWidth(2,150); this->ui->tableView->setColumnWidth(3,150);  model_history->setItem(i,0,new QStandardItem(DeviceID->valuestring)); model_history->setItem(i,1,new QStandardItem(DeviceType_result)); model_history->setItem(i,2,new QStandardItem(QString::number(SensorValues->valuedouble))); model_history->setItem(i,3,new QStandardItem(QString::number(acceptTime->valueint))); 

c/c++开发分享迅为4412——QT4开发手册地址：https://blog.csdn.net/JoshRong/article/details/109262836