Qt天气查询

#include "widget.h" #include "ui_widget.h" #include<QJsonParseError> #include<QJsonDocument> #include<QJsonObject> #include<QJsonValue> #include<QMessageBox> #include<QDebug> #include<QJsonArray> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); setWindowFlags(Qt::FramelessWindowHint|windowFlags()); QPalette pal(palette()); pal.setColor(QPalette::Background, QColor(50, 50, 50)); pal.setColor(QPalette::WindowText,QColor(255,255,255)); setAutoFillBackground(true); setPalette(pal); ui->widget->setFixedHeight(35); ui->ICONlabel->setFixedSize(25,25); ui->ICONlabel->setScaledContents(true); ui->ICONlabel->setPixmap(QPixmap(":/ICON/tb.png")); ui->BIAOTIlabel->setMinimumSize(80,25); ui->BIAOTIlabel->setText(" 天气查询"); ui->BIAOTIlabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed); ui->pushButtonmin->setFixedSize(27,25); ui->pushButtonmax->setFixedSize(27,25); ui->pushButtonclose->setFixedSize(27,25); ui->lineedit->setMinimumHeight(20); ui->pushButton->setMinimumHeight(25); ui->lineedit->setStyleSheet("background-color:transparent;color:rgb(255,255,255);border-width:1;border-radius:10px;padding:2px 4px;border-style:outset");//border:2px groove blue; ui->tableWidget->setHorizontalHeaderLabels(QStringList() <<tr("日期")<<tr("温度")<<tr("风力")<<tr("风向")<<tr("天气")); //ui->tableWidget->horizontalHeader()->setHidden(true); ui->tableWidget->verticalHeader()->setHidden(true); ui->tableWidget->setStyleSheet("background-color:transparent;color:rgb(255,255,255)"); ui->tableWidget->horizontalHeader()->setStyleSheet("QHeaderView::section {background-color:transparent;padding-left: 4px;border: 1px solid #6c6c6c}"); } Widget::~Widget() { delete ui; } void Widget::on_pushButton_clicked() { manage = new QNetworkAccessManager(this); connect(manage,SIGNAL(finished(QNetworkReply *)),this,SLOT(replyFinished(QNetworkReply*))); QNetworkRequest network_request; /*设置发送数据*/ network_request.setUrl(QUrl(QString("http://wthrcdn.etouch.cn/weather_mini?city=%1").arg(ui->lineedit->text()))); network_request.setHeader(QNetworkRequest::UserAgentHeader,"RT-Thread ART"); /*发送get网络请求*/ manage->get(network_request); } void Widget::replyFinished(QNetworkReply *reply) { /*对数据进行编码*/ QTextCodec *codec=QTextCodec::codecForName("utf8"); QString all=codec->toUnicode(reply->readAll()); init(all); reply->deleteLater(); } void Widget::init(QString str)//读取json数据 { ui->tableWidget->clear(); ui->tableWidget->setColumnCount(5); ui->tableWidget->setHorizontalHeaderLabels(QStringList() <<tr("日期")<<tr("温度")<<tr("风力")<<tr("风向")<<tr("天气")); QByteArray byte_array; QJsonParseError json_error; QJsonDocument document = QJsonDocument::fromJson(byte_array.append(str),&json_error); if(json_error.error == QJsonParseError::NoError) { QJsonObject obj = document.object(); QJsonValue value = obj.take("desc");//qjsonvalue生成json文档中对象的值的对象 if(value.toString() != "OK") { QMessageBox::warning(this,"抱歉","暂无此城市的天气情况",QMessageBox::Ok,QMessageBox::Ok); return; } QJsonValue da = obj.take("data");//获取data数据对象里面的值 data.ganmao = da.toObject().take("ganmao").toString();//da.toobject()表示的是data对象里面的对象，tostring再将它转换成string类型 data.wendu = da.toObject().take("wendu").toString(); data.city = da.toObject().take("city").toString(); //QString使用%1、%2~%99的参数范围显示或储存字符串 /*举个栗子 * QString i = "10"; * QString j = "25"; * Qstring filename = "test.cpp"; * QString string = QString("Processing file %1 of %2:%3") * .arg(i).arg(j).arg(filename);*/ QJsonValue da1 = da.toObject().take("forecast"); QJsonArray array = da1.toArray(); for(int i =0;i<5;i++) { QJsonValue value = array.at(i); QJsonObject obj = value.toObject(); forecast[i].fengxiang = obj.take("fengxiang").toString(); forecast[i].date = obj.take("date").toString(); forecast[i].fengli = obj.take("fengli").toString(); forecast[i].high = obj.take("high").toString(); forecast[i].low = obj.take("low").toString(); forecast[i].type = obj.take("type").toString(); } for(int i =0;i<5;i++) { ui->tableWidget->setRowCount(i+1); for(int j=0;j<5;j++) { QTableWidgetItem *tab=new QTableWidgetItem; if(j==0) { tab->setText(forecast[i].date); } if(j==1) { tab->setText(QString::fromLocal8Bit("%1-%2").arg(forecast[i].low.split(" ").at(1)).arg(forecast[i].high.split(" ").at(1))); } if(j==2) { QString str=forecast[i].fengli.split("[").at(2); tab->setText(str.split("]").at(0)); } if(j==3) { tab->setText(forecast[i].fengxiang); } if(j==4) { tab->setText(forecast[i].type); } tab->setTextAlignment(Qt::AlignVCenter); ui->tableWidget->setItem(i,j,tab); } } } } void Widget::on_pushButtonmin_clicked() { this->showMinimized(); } void Widget::on_pushButtonmax_clicked() { this->isMaximized() ? this->showNormal() : this->showMaximized(); } void Widget::on_pushButtonclose_clicked() { this->close(); } void Widget::mousePressEvent(QMouseEvent *event) { if (event->button() == Qt::LeftButton) { dragPosition = event->globalPos() - frameGeometry().topLeft(); event->accept(); } } void Widget::mouseMoveEvent(QMouseEvent *event) { if (event->buttons() & Qt::LeftButton) { move(event->globalPos() - dragPosition); event->accept(); } }