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qtqpixmap

QT QPixmap load image defeat

    qDebug() << QFileInfo(":/images/123.jpg").exists();

    QPixmap myPix;
    myPix.load(":/images/123.jpg");

    if(myPix.isNull())
    {
        qDebug() << "Failed to load image" ;
    }

true
Failed to load image

Here is the code and output. It bothers me a lot of time.

Solution

  • it look like the res is corrupt... and cant be loaded.

    you should verify that the res is loaded properly:

    if(myPix.load(":/images/123.jpg"))
{
    ....
}

    like in the doc stated (https://doc.qt.io/qt-5/qpixmap.html#load):

    Loads a pixmap from the file with the given fileName. Returns true if the pixmap was successfully loaded; otherwise invalidates the pixmap and returns false.