QT图片与QByteArray转换

QT图片与QByteArray转换

#include "MainWindow.h"

#include <QBuffer>

#include <QFile>

#include <QPushButton>

MainWindow::MainWindow(QWidget *parent)

: QMainWindow(parent)

{

this->setFixedSize(500,500);

QPixmap image("d:/aaa.png");

QByteArray bytearray;

QBuffer buffer(&bytearray);

buffer.open(QIODevice::WriteOnly);

bool bOk = image.save(&buffer,"PNG",20);

QPixmap imageresult;//

imageresult.loadFromData(bytearray);

imageresult.save("d:/result.png");

QPushButton *btnoriginal = new QPushButton(this);

btnoriginal->setIcon(QIcon(image));

btnoriginal->setIconSize(QSize(100,100));

btnoriginal->setFixedSize(QSize(100,100));

btnoriginal->move(0,0);

QPushButton *btn = new QPushButton(this);

btn->setIcon(QIcon(imageresult));

btn->setIconSize(QSize(100,100));

btn->setFixedSize(QSize(100,100));

btn->move(100,100);

int i=0;

}

MainWindow::~MainWindow()

{

}