是否用QImage::save(XXX)就可以保存图像，如何操作 [复制链接]

1、载入图像，是可以显示的；
2、保存图像失败？

没有问题，保存成功的

#include <QApplication>
#include <QImage>
#include <QWidget>
//
int main(int argc, char ** argv)
{
    QApplication app( argc, argv );
    QWidget win;
    QImage *image = new QImage();
    image->load("/kaiye.jpg");
    image->save("/1.jpg","jpg",1);
    
    
    win.show();
    //app.connect( &app, SIGNAL( lastWindowClosed() ), &app, SLOT( quit() ) );
    return app.exec();
}

你的QT是什么版本？

bool QImage::save ( const QString & fileName, const char * format, int quality = -1 ) const
Saves the image to the file with the given fileName, using the given image file format and quality factor.

The quality factor must be in the range 0 to 100 or -1. Specify 0 to obtain small compressed files, 100 for large uncompressed files, and -1 (the default) to use the default settings.

Returns true if the image was successfully saved; otherwise returns false.

See also Reading and Writing Image Files.

bool QImage::save ( QIODevice * device, const char * format, int quality = -1 ) const
This is an overloaded member function, provided for convenience.

This function writes a QImage to the given device.

This can, for example, be used to save an image directly into a QByteArray:

            QImage image;
            QByteArray ba;
            QBuffer buffer(&ba);
            buffer.open(QIODevice::WriteOnly);
            image.save(&buffer, "PNG"); // writes image into ba in PNG format