QT QPixmap加载图像失败

Question

    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

这是代码和输出。它困扰了我很多时间。

Answer 1

看起来资源已损坏...无法加载。

您应该验证资源是否已正确加载：

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

如文档中所述 (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.

QT QPixmap加载图像失败

QT QPixmap load image defeat

qt

qpixmap