Qt图片与Base64之间的编解码

#include 
#include 
#include 
#include 
#include 
#include 

QByteArray MainWindow::Image_To_Base64(QString ImgPath);	//参数是图片路径

QPixmap MainWindow::Base64_To_Image(QByteArray bytearray,QString SavePath);	//参数1是Base64码， 参数2是转换后的图片保存路径

QByteArray MainWindow::Image_To_Base64(QString ImgPath)

{

    QImage image(ImgPath);

    QByteArray ba;

    QBuffer buf(&ba);

    image.save(&buf,"PNG",20);

    QByteArray hexed = ba.toBase64();

    buf.close();

    return hexed;

}

QPixmap MainWindow::Base64_To_Image(QByteArray bytearray,QString SavePath)

{

    QByteArray Ret_bytearray;

    Ret_bytearray = QByteArray::fromBase64(bytearray);

    QBuffer buffer(&Ret_bytearray);

    buffer.open(QIODevice::WriteOnly);

    QPixmap imageresult;

    imageresult.loadFromData(Ret_bytearray);

    if(SavePath != "")

    {

        qDebug() <<"save" ;

        imageresult.save(SavePath);

    }

    return imageresult;

}

int  main()

{

    QByteArray src = Image_To_Base64("d:/result.png");

    QPixmap dest = Base64_To_Image(src,"e:/result.png");

    //ui->label->setPixmap(dest);	//可用Qlabel显示

	return 0;

}