迅为4412——QT4开发手册

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# 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);

无标题栏显示

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("http://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)));

本文地址：https://blog.csdn.net/JoshRong/article/details/109262836