QT 显示网络图片我目前的办法就是先下载下来 然后显示  如果有好的办法请相互交流一下 

需要调用的头文件

#include 
     
      #include 
      
     

需要在工程中添加

QT += network

主要的代码:

#include "dialog.h"#include "ui_dialog.h"Dialog::Dialog(QWidget *parent) :    QDialog(parent),    ui(new Ui::Dialog){    ui->setupUi(this);    connect(&netManager, SIGNAL(finished(QNetworkReply*)), this, SLOT(replyFinished(QNetworkReply*)));    QUrl url;    url = QUrl("http://kexirobot.oss-cn-shanghai.aliyuncs.com/upload/robot0/pic1/1.png");    QNetworkRequest request;    request.setUrl(url);    netManager.get(request);}void Dialog::replyFinished(QNetworkReply *reply){    qDebug() << "reply :" << reply<< endl;    if(reply->error() == QNetworkReply::NoError)    {        QByteArray data_bytes = reply->readAll();        QPixmap* cur_pictrue =new QPixmap();        cur_pictrue->loadFromData(data_bytes);        cur_pictrue->save("./cur_night_picture.png");//        delete cur_pictrue;//        picture[1].load("cur_night_picture.png");    }    reply->deleteLater();}Dialog::~Dialog(){    delete ui;} 工程代码

https://pan.baidu.com/s/1JgEbJH-QNW_T3ECmmI5EkQ