求大神帮忙改进以下程序，200行不到！

[mysunshinexia]

环境 5.0以上可以运行 ，UI随便拖两个label，代码如下！求大神看下问题以及求改进指导！不胜感激！
主要问题：内存在疯狂增长
/*--------------------------------------------------------------------------------------------------------------------*/

//mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QMovie>
#include <QTimer>
#include <QPixmap>
#include <QNetworkAccessManager>
#include <QPixmap>
#include <QPixmap>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QByteArray>
#include <QUrl>
#include <QTextEdit>
#include <QEventLoop>
#include <QLabel>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private slots:
void on_label_linkActivated(const QString &link);
void update();
void on_textBrowser_destroyed();

private:
Ui::MainWindow *ui;
QMovie *movie;
QTimer *timer;
int i;
QUrl *url ;
QNetworkAccessManager manager;
QEventLoop loop;
QNetworkReply *reply;
QByteArray jpegData;
};

#endif // MAINWINDOW_H

/*--------------------------------------------------------------------------------------------------------------------*/

//mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"



MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
movie= new QMovie();
ui->label->setMovie(movie);
i=0;
timer = new QTimer(this);
ui->label_2->resize (640,320 );
ui->label_3->resize (640,320 );
connect(timer, SIGNAL(timeout()), this, SLOT(update()));
timer->start(45); //1s执行一次update()

}

MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::on_label_linkActivated(const QString &link)
{
}
void MainWindow::update()
{

/*<img src=\"http://192.168.3.3/pull.bmp\"/>
*/
//QUrl url("http://img01.cztv.com/201412/05/8c0fb86122a38830b534fb8e4238d169.jpg");
QUrl url("http://192.168.3.3/pull.bmp");
// qDebug() << "Reading picture form " << url;
reply = manager.get(QNetworkRequest(url));
//请求结束并下载完成后，退出子事件循环
QObject::connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));
//开启子事件循环
loop.exec();
jpegData=reply->readAll();
QPixmap pixmap;
pixmap.loadFromData(jpegData);
ui->label_3->setPixmap(pixmap); // 你在QLabel显示图片
ui->label_2->setPixmap(pixmap); // 你在QLabel显示图片
//ui->label_2->setStyleSheet("color:black");
//movie->start();
}

void MainWindow::on_textBrowser_destroyed()
{

}

/*--------------------------------------------------------------------------------------------------------------------*/
//main.h

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

return a.exec();
}

[大卫无限]

jpegData=reply->readAll();

在这后面加入

reply->deleteLater();

我觉得这应该是你内存变多的原因.