1. MainWindow类设计的成员变量和方法
public:
MainWindow(QWidget* parent = nullptr);
~MainWindow();protected:
形成文本菜单来用来右键关闭窗口
void contextMenuEvent(QContextMenuEvent* event);鼠标被点击之后此事件被调用
void mousePressEvent(QMouseEvent *ev);
移动窗口
void mouseMoveEvent(QMouseEvent* ev);
//重写过滤器方法
bool eventFilter(QObject *watched, QEvent *event);private slots://信号槽函数
void onReplied(QNetworkReply* reply);void on_btnSearch_clicked();
public:
void getWeaterInfo(QString cityCode);
//解析json数据
void parseJson(QByteArray& byteArray);
int parseString(QString str);
//更新UI
void UpdateUi();
//检测空气质量
int checkedQulity(int api);
//绘制高低温曲线
void paintHighCurve();
void paintLowCurve();
private:
Ui::MainWindow* ui;QMenu* mExitMenu; // 右键退出的菜单
QAction* mExitAct; // 退出的行为
QPoint m_offset;//鼠标和左上角坐标的偏移距离
QNetworkAccessManager *m_netAccessManager;
Today m_today;
Day m_day[7];//星期和日期
QList<QLabel*> m_weekList;
QList<QLabel*> m_dateList;//天气和天气图标
QList<QLabel*> m_typeList;
QList<QLabel*> m_typeIconList;//天气污染指数
QList<QLabel*> m_ApiList;//风力和风向
QList<QLabel*> m_FLList;
QList<QLabel*> m_FXList;
把UI控件都放到QList集合里面
//将UI控件放到数组里边,方便使用循环进行处理
m_dateList << ui->lblDate0 << ui->lblDate1 << ui->lblDate2 << ui->lblDate3 << ui->lblDate4 << ui->lblDate5;
m_weekList << ui->lblWeek0 << ui->lblWeek1 << ui->lblWeek2 << ui->lblWeek3 << ui->lblWeek4 << ui->lblWeek5;
m_ApiList << ui->lblQuality0 << ui->lblQuality1 << ui->lblQuality2 << ui->lblQuality3 << ui->lblQuality4 << ui->lblQuality5;
m_typeList << ui->lblType0 << ui->lblType1 << ui->lblType2 << ui->lblType3 << ui->lblType4 << ui->lblType5;
m_typeIconList << ui->lblTypeIcon0 << ui->lblTypeIcon1 << ui->lblTypeIcon2 << ui->lblTypeIcon3 << ui->lblTypeIcon4 << ui->lblTypeIcon5;
m_FXList << ui->lblFx0 << ui->lblFx1 << ui->lblFx2 << ui->lblFx3 << ui->lblFx4 << ui->lblFx5;
m_FLList << ui->lblFl0 << ui->lblFl1 << ui->lblFl2 << ui->lblFl3 << ui->lblFl4 << ui->lblFl5;
QMap <QString,QString> m_typeMap;
2. 右键退出
void contextMenuEvent(QContextMenuEvent* event);
mExitMenu->exec(QCursor::pos()); event->accept();
QMenu* mExitMenu; 右键退出的菜单
// 右键菜单:退出程序
mExitMenu = new QMenu(this);//添加一个菜单框
mExitAct = new QAction();
mExitAct->setText(tr("退出"));
mExitAct->setIcon(QIcon(":/res/close.png"));
mExitMenu->addAction(mExitAct);//把这个行为设置到菜单里面去connect(mExitAct, &QAction::triggered, this, [=]() {
qApp->exit(0);
});
3.存放天气信息的类
class Today
{
public:
Today()
{
date = "2022-10-20";
city = "广州";
ganmao = "感冒指数";
wendu = 0;
shidu = "0%";
pm25 = 0;
quality = "无数据";
type = "多云";
fl = "2级";
fx = "南风";
high = 30;
low = 18;
}
QString date;
QString city;
QString ganmao;
int wendu;
QString shidu;
int pm25;
QString quality;
QString type;
QString fx;
QString fl;
int high;
int low;
};
class Day
{
public:
Day()
{
date = "2022-10-20";
week = "周五";
type = "多云";
high = 0;
low = 0;
fx = "南风";
fl = "2级";
aqi = 0;
}
QString date;
QString week;
QString type;
QString ymd;
int high;
int low;
QString fx;
QString fl;
int aqi;
};
4.get请求数据
void MainWindow::getWeaterInfo(QString cityName) { QString cityCode=weatherTool::getCityCode(cityName); qDebug()<<"cityCode"<<cityCode; QUrl url("http://t.weather.itboy.net/api/weather/city/"+cityCode); m_netAccessManager->get(QNetworkRequest(url));//发送get请求 }
5.重写void onReplied函数
void onReplied(QNetworkReply* reply);在get请求成功之后此函数被调用
void MainWindow::onReplied(QNetworkReply *reply)
{
qDebug()<<"onReplied success";
int status_code=reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
qDebug()<<"参数: "<<reply->operation();
qDebug()<<"状态码: "<<status_code;
qDebug()<<"url: "<<reply->url();
qDebug()<<"请求头: "<<reply->rawHeaderList();
if(reply->error()!=QNetworkReply::NoError||status_code!=200){
qDebug()<<reply->errorString().toLatin1().data();
QMessageBox::warning(this,"天气预报","数据请求失败",QMessageBox::Ok);
}
else{
QByteArray all=reply->readAll();
qDebug()<<"read all : "<<all.data() ;
parseJson(all);
}
reply->deleteLater();
}
在此函数里把请求到的数据全部读出来
6.读出类之后在调用parseJson(all);来进行解析JSON数据
void MainWindow::parseJson(QByteArray &byteArray)
{
QJsonParseError err;
QJsonDocument doc=QJsonDocument::fromJson(byteArray,&err);
if(err.error!=QJsonParseError::NoError){
qDebug()<<"解析Json出错了";
return ;
}
//Json对象,包括了请求的全部数据
QJsonObject rootObj = doc.object();
//qDebug() << rootObj;
QJsonObject dataObj = rootObj.value("data").toObject();
QJsonObject yesterdayObj = dataObj.value("yesterday").toObject();
//Json数组,未来几天的数据
QJsonArray forecastArray = dataObj.value("forecast").toArray();
//1.解析日期和城市
QString str = rootObj.value("time").toString();
m_today.date= str.split(" ").at(0);
qDebug()<<"今天:"<<m_today.date;
m_today.city = rootObj.value("cityInfo").toObject().value("city").toString();
//2.解析yesterday
m_day[0].date = yesterdayObj.value("date").toString();//日期
m_day[0].aqi = yesterdayObj.value("aqi").toDouble();//空气质量,toDouble包括整数型
m_day[0].type = yesterdayObj.value("type").toString();//天气类型
m_day[0].week = yesterdayObj.value("week").toString();//星期
m_day[0].ymd = yesterdayObj.value("ymd").toString();//完整年月日
//解析最低温度和最高温度
/*
QString str = yesterdayObj.value("low").toString();//最低温度
str = str.split(" ").at(1);//以空格为分割符,去除前面的文字,取出第二个X℃,
str = str.left(str.length() - 1);//去除后面的摄氏度符号
mDay[0].low = str.toInt();//传入最低温度
str.clear();//清除内容
str = yesterdayObj.value("high").toString();//最高温度
str = str.split(" ").at(1);//以空格为分割符,去除前面的文字,取出第二个X℃,
str = str.left(str.length() - 1);//去除后面的摄氏度符号
mDay[0].high = str.toInt();//传入最高温度
*/
//简化版
m_day[0].low = parseString(yesterdayObj.value("low").toString());//最低温度
m_day[0].high = parseString(yesterdayObj.value("high").toString());//最高温度
m_day[0].fx = yesterdayObj.value("fx").toString();//风向
m_day[0].fl = yesterdayObj.value("fl").toString();//风力
//3.解析forecast中的6天数据
for (int i = 0; i < 5; ++i) {
QJsonObject forecastData = forecastArray[i].toObject();
//跳过0,因为0已经赋值给昨天的数据了
m_day[i + 1].date = forecastData.value("date").toString();//日期
//qDebug()<<"time: "<<m_day[i + 1].date;
m_day[i + 1].aqi = forecastData.value("aqi").toDouble();//空气质量,toDouble包括整数型
m_day[i + 1].type = forecastData.value("type").toString();//天气类型
m_day[i + 1].week = forecastData.value("week").toString();//星期
m_day[i + 1].low = parseString(forecastData.value("low").toString());//最低温度
m_day[i + 1].high = parseString(forecastData.value("high").toString());//最高温度
m_day[i + 1].fx = forecastData.value("fx").toString();//风向
m_day[i + 1].fl = forecastData.value("fl").toString();//风力
m_day[i + 1].ymd = forecastData.value("ymd").toString();//完整年月日
//ymd分割成MM/dd
//QDateTime::fromString(forecastData.value("ymd").toString(), "yyyy-MM-dd").toString("MM/dd");//日期
//qDebug() << i << mDay[i + 1].date << mDay[i + 1].aqi << mDay[i + 1].type << mDay[i + 1].week << mDay[i + 1].low << mDay[i + 1].high << mDay[i + 1].fx << mDay[i + 1].fl;
//qDebug() << i << mDay[i].date;
//qDebug() << mDay[i + 1].ymd;
}
//4.解析今天的数据
m_today.shidu = dataObj.value("shidu").toString();
m_today.quality = dataObj.value("quality").toString();
m_today.ganmao = dataObj.value("ganmao").toString();
m_today.pm25 = dataObj.value("pm25").toDouble();
m_today.wendu = dataObj.value("wendu").toString().toInt();
//qDebug() << dataObj;
//qDebug() << mToday.shidu << mToday.quality << mToday.ganmao << mToday.pm25 << mToday.wendu;
//注意:forecast中的第2个元素也是今天的数据
m_today.type = m_day[1].type;
qDebug()<<"今天的天气是: "<<m_today.type;
m_today.low = m_day[1].low;
m_today.high = m_day[1].high;
m_today.fx = m_day[1].fx;
m_today.fl = m_day[1].fl;
//qDebug() << mToday.type << mToday.low << mToday.high << mToday.fx << mToday.fl;
UpdateUi();
//更新曲线在搜索城市完成后手动更新曲线
ui->lblHighCurve->update();
ui->lblLowCurve->update();
}
解析完JSON数据之后在更新ui(UpdateUi();)
7.更新UI
void MainWindow::UpdateUi()
{
ui->lblDate->setText(QDateTime::fromString(m_today.date,"yyyyMMdd").toString("yyyy/MM/dd")+" "+m_day[1].week);
ui->lblCity->setText(m_today.city);
//更新今天数据
ui->lblTypeIcon->setPixmap(m_typeMap[m_today.type]);//更新图片
ui->lblTemp->setText(QString ::number(m_today.wendu));
ui->lblType->setText(m_today.type);
ui->lblLowHigh->setText(QString ::number(m_today.low)+"℃ ~ "+QString::number(m_today.high)+"℃");
ui->lblGanMao->setText("感冒指数: "+m_today.ganmao);
ui->lblWindFl->setText(m_today.fl);
ui->lblWindFx->setText(m_today.fx);
ui->lblPM25->setText(QString::number(m_today.pm25));
ui->lblShiDu->setText(m_today.shidu);
ui->lblQuality->setText(m_today.quality);
//更新六天
for(int i=0;i<6;i++){
//更新日期和时间
m_weekList[i]->setText("周"+m_day[i].week.right(1));//从右边取第一个
ui->lblWeek0->setText("昨天");
ui->lblWeek1->setText("今天");
ui->lblWeek2->setText("明天");
// //把日期提取出来变成 10/10格式
QStringList slist=m_day[i].ymd.split("-");
qDebug()<<slist;
m_dateList[i]->setText(slist.at(1)+"/"+slist.at(2));
//更新天气类型
m_typeList[i]->setText(m_day[i].type);
m_typeIconList[i]->setPixmap(m_typeMap[m_day[i].type]);//更新图片
//空气质量
switch (checkedQulity(m_day[i].aqi)) {
case 1:
m_ApiList[i]->setText("优");
m_ApiList[i]->setStyleSheet("background-color: rgb(121,184,0);");
break;
case 2:
m_ApiList[i]->setText("良");
m_ApiList[i]->setStyleSheet("background-color: rgb(255,187,23);");
break;
case 3:
m_ApiList[i]->setText("轻度");
m_ApiList[i]->setStyleSheet("background-color: rgb(255,87,97);");
break;
case 4:
m_ApiList[i]->setText("中度");
m_ApiList[i]->setStyleSheet("background-color: rgb(235,17,27);");
break;
case 5:
m_ApiList[i]->setText("重度");
m_ApiList[i]->setStyleSheet("background-color: rgb(170,0,0);");
break;
case 6:
m_ApiList[i]->setText("严重");
m_ApiList[i]->setStyleSheet("background-color: rgb(110,0,0);");
break;
}
//风力风向
m_FXList[i]->setText(m_day[i].fx);
m_FLList[i]->setText(m_day[i].fl);
}
}
//检查空气质量
int MainWindow::checkedQulity(int aqi)
{
if (aqi >= 0 && aqi <= 50) {
return 1;
}else if(aqi > 50 && aqi <= 100){
return 2;
}else if(aqi > 100 && aqi <= 150){
return 3;
}else if(aqi > 150 && aqi <= 200){
return 4;
}else if(aqi > 200 && aqi <= 250){
return 5;
}else{
return 6;
}
return -1;
}
8.实现搜索框搜索城市
获取LeCity搜索框输入的数据
void MainWindow::on_btnSearch_clicked()
{
QString cityName=ui->leCity->text();
getWeaterInfo(cityName);
}
天气工具类
//天气工具类
class weatherTool{
private:
//内联静态变量 在占用调用处的内存
inline static QMap<QString,QString> m_cityMap={};
static void initCityMap(){
QFile fd("E:\\code\\citycode.json");
fd.open(QIODevice::ReadOnly|QIODevice::Text);
QByteArray allJson=fd.readAll();
fd.close();
QJsonParseError err;
//读出的数据转换为json的
QJsonDocument doc= QJsonDocument::fromJson(allJson,&err);
if(err.error!=QJsonParseError::NoError||!doc.isArray()){
//不是数组就错误
qDebug()<<"json数据转换失败...";
return;
} //转换成json数组
QJsonArray rootArray=doc.array();
for(int i=0;i<rootArray.size();i++){
QString cityName = rootArray[i].toObject().value("city_name").toString();
QString cityCode = rootArray[i].toObject().value("city_code").toString();
//判断编号是否存在
if(cityCode.size()>0){
m_cityMap.insert(cityName,cityCode);
}
}
}
public :
QString static getCityCode(QString cityName){
qDebug()<<"cityName"<<cityName;
if(m_cityMap.isEmpty()){
qDebug()<< m_cityMap.isEmpty();
initCityMap();
}
if(cityName==""){
QMessageBox::warning(nullptr,"错误(null)","输入的城市不能为空...",QMessageBox::Ok);
return "";
}
//在map寻找传入的城市名称,返回值可以遍历
//返回的是map中的多个元素
QMap<QString, QString>::iterator it = m_cityMap.find(cityName);
//到结尾了,未找到,加上市,再搜一遍
if (it == m_cityMap.end()) {
it = m_cityMap.find(cityName + "市");
}
//找到了
if (it != m_cityMap.end()) {
qDebug()<<" if (it != m_cityMap.end())";
return it.value();
}
QMessageBox::warning(nullptr,"城市名字错误","输入的城市名字错误...",QMessageBox::Ok);
//否则
return "";
}
};
读取这个文件里面的数据QFile fd("E:\\code\\citycode.json");把city_name和city_code取出来放到QMap集合里面去,之后在和输入的CityName进行查找获得city_code.
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文章来源地址https://www.toymoban.com/news/detail-657946.html
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