Qt tip 网络请求 QNetworkRequest QJason 处理 Jason
- 通过天气api获取当前天气
- api来自 百度apiStore。http://apistore.baidu.com/apiworks/servicedetail/112.html
需要自己申请秘钥API
获取到的天气api数据是Jason格式的，新版的qt有专门的Jason类处理，比较方便。老版的貌似有库，可自行试试。
需要在pro文件添加
QT += network 头文件
#include 发送api请求
//发送请求
void Widget::on_pushButton_clicked()
{
manage = new QNetworkAccessManager(this);
QNetworkRequest network_request;
QString cityName = "上海";
/*设置发送数据*/
network_request.setUrl(QUrl(QString("http://apis.baidu.com/apistore/weatherservice/recentweathers?cityname=%1")
.arg(cityName)));
network_request.setRawHeader("apikey", "您自己的apikey");
/*建立connect，replyFinished为自定义槽函数，获取api发回来的天气信息（Jason）格式*/
connect(manage,SIGNAL(finished(QNetworkReply *)),this,SLOT( getReplyFinished(QNetworkReply *)) );
/*发送get网络请求*/
manage->get(network_request);
}获取api发回的数据
//获取天气api传回的数据
void Widget::getReplyFinished(QNetworkReply *reply)
{
QJsonObject data = QJsonDocument::fromJson(reply->readAll()).object();
qDebug() << "天气Jason：" << data;
//ui->textBrowser->setText(data);
}
将网络请求封装成一个函数
//widget.h
QNetworkAccessManager *manage;
//widget.cpp
void Widget::setNetworkRequest(QNetworkRequest &request, QString cityName)
{
request.setUrl(QUrl(QString("http://apis.baidu.com/apistore/weatherservice/recentweathers?cityname=%1")
.arg(cityName)));
request.setRawHeader("apikey", "b446bb51d329b1098b008568231a772b");
}
//获取天气api传回的数据
void Widget::getReplyFinished(QNetworkReply *reply)
{
QJsonObject data = QJsonDocument::fromJson(reply->readAll()).object();
qDebug() << "天气Jason：" << data;
}
/********调用*********/
//设置发送数据
manage = new QNetworkAccessManager(this);
QString cityName = "上海";
qDebug() << "init cityName:" << cityName;
//发送请求
setNetworkRequest(network_request, cityName);
connect(manage,SIGNAL(finished(QNetworkReply *)),this,SLOT(getReplyFinished(QNetworkReply*)));
//发送get网络请求
manage->get(network_request);- 获取到Jason的数据处理
Jason返回数据 http://apistore.baidu.com/astore/toolshttpproxy?apiId=ucy1xA&isAworks=1
返回的Jason数据如：
{
"errNum": 0,
"errMsg": "success",
"retData": {
"city": "北京",
"cityid": "101010100",
"today": {
"date": "2016-09-01",
"week": "星期四",
"curTemp": "25℃",
"aqi": "31",
"fengxiang": "北风",
"fengli": "3-4级",
"hightemp": "27℃",
"lowtemp": "19℃",
"type": "阴",
"index": [
{
"name": "感冒指数",
"code": "gm",
"index": "",
"details": "相对于今天将会出现大幅度降温，易发生感冒，请注意适当增加衣服，加强自我防护避免感冒。",
"otherName": ""
},
{
"code": "fs",
"details": "属弱紫外辐射天气，长期在户外，建议涂擦SPF在8-12之间的防晒护肤品。",
"index": "弱",
"name": "防晒指数",
"otherName": ""
},
{
"code": "ct",
"details": "建议着长袖T恤、衬衫加单裤等服装。年老体弱者宜着针织长袖衬衫、马甲和长裤。",
"index": "舒适",
"name": "穿衣指数",
"otherName": ""
},
{
"code": "yd",
"details": "阴天，较适宜进行各种户内外运动。",
"index": "较适宜",
"name": "运动指数",
"otherName": ""
},
{
"code": "xc",
"details": "较适宜洗车，未来一天无雨，风力较小，擦洗一新的汽车至少能保持一天。",
"index": "较适宜",
"name": "洗车指数",
"otherName": ""
},
{
"code": "ls",
"details": "天气阴沉，不利于水分的迅速蒸发，不太适宜晾晒。若需要晾晒，请尽量选择通风的地点。",
"index": "不太适宜",
"name": "晾晒指数",
"otherName": ""
}
]
},
"forecast": [
{
"date": "2016-09-02",
"week": "星期五",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "28℃",
"lowtemp": "20℃",
"type": "阴"
},
{
"date": "2016-09-03",
"week": "星期六",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "29℃",
"lowtemp": "20℃",
"type": "多云"
},
{
"date": "2016-09-04",
"week": "星期天",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "29℃",
"lowtemp": "19℃",
"type": "阵雨"
},
{
"date": "2016-09-05",
"week": "星期一",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "30℃",
"lowtemp": "21℃",
"type": "多云"
}
],
"history": [
{
"date": "2016-08-25",
"week": "星期四",
"aqi": "31",
"fengxiang": "北风",
"fengli": "4-5级",
"hightemp": "30℃",
"lowtemp": "18℃",
"type": "多云"
},
{
"date": "2016-08-26",
"week": "星期五",
"aqi": "41",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "29℃",
"lowtemp": "17℃",
"type": "晴"
},
{
"date": "2016-08-27",
"week": "星期六",
"aqi": "73",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "32℃",
"lowtemp": "20℃",
"type": "晴"
},
{
"date": "2016-08-28",
"week": "星期天",
"aqi": "42",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "31℃",
"lowtemp": "18℃",
"type": "晴"
},
{
"date": "2016-08-29",
"week": "星期一",
"aqi": "56",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "31℃",
"lowtemp": "19℃",
"type": "晴"
},
{
"date": "2016-08-30",
"week": "星期二",
"aqi": "99",
"fengxiang": "无持续风向",
"fengli": "微风级",
"hightemp": "30℃",
"lowtemp": "19℃",
"type": "多云"
},
{
"date": "2016-08-31",
"week": "星期三",
"aqi": "43",
"fengxiang": "北风",
"fengli": "3-4级",
"hightemp": "33℃",
"lowtemp": "20℃",
"type": "晴"
}
]
}
}头文件
#include 在widget.h中添加一个结构体存放天气信息
struct WeatherInfo{
QString date;
QString week;
QString type;
QString curTemp;
QString hightemp;
QString lowtemp;
QString fengli;
QString fengxiang;
QString aqi;
};public:
explicit Widget(QWidget *parent = 0);
~Widget();
void getTodayWeatherInfo(QJsonObject data); //获取当日天气信息widget.cpp中将Jason处理，并且保存到结构体，打印处理。如下：
//获取当日天气信息
void Widget::getTodayWeatherInfo(QJsonObject data)
{
QJsonObject today = data.value("retData").toObject().value("today").toObject();
WeatherInfo todayInfo;
todayInfo.date = today.value("date").toString();//2016-08-26
todayInfo.week = today.value("week").toString();//星期五
todayInfo.type = today.value("type").toString();//阵雨
todayInfo.curTemp = today.value("curTemp").toString();//30℃
todayInfo.hightemp = today.value("hightemp").toString();//34℃
todayInfo.lowtemp = today.value("lowtemp").toString();//24℃
todayInfo.fengli = today.value("fengli").toString();//微风级
todayInfo.fengxiang = today.value("fengxiang").toString();//东北风
todayInfo.aqi = today.value("aqi").toString();//60
qDebug() << "getTodayWeatherInfo:\n" << todayInfo.date + todayInfo.week << todayInfo.type << todayInfo.curTemp
<< todayInfo.hightemp << todayInfo.lowtemp << todayInfo.fengli << todayInfo.fengxiang
<< todayInfo.aqi;
QStringList todayInfoList;
todayInfoList << todayInfo.date + todayInfo.week << todayInfo.type << todayInfo.curTemp
<< todayInfo.hightemp << todayInfo.lowtemp << todayInfo.fengli << todayInfo.fengxiang
<< todayInfo.aqi;
for(int i=0; i < todayInfoList.size(); i++)
{
ui->textBrowser->append(todayInfoList.at(i));
}
}
其它的比如历史七天数据，洗车啊什么的都是类似的操作。