按钮三态图

  

Btn_Min->setStyleSheet("QPushButton{border-image: url(:/new/prefix2/Pic/JPG/minback.png)0 60 0 0;}"
                           "QPushButton:hover{border-image: url(:/new/prefix2/Pic/JPG/minback.png)0 30 0 30;}"
                           "QPushButton:pressed{border-image: url(:/new/prefix2/Pic/JPG/minback.pngp)0 0 0 60;}");

裁剪图片

QImage image("C:/Users/Mactarvish/Desktop/myPicture_v1.png");
QImage newImage = image.copy(90, 90, image.width()-90, image.height()-90);
qDebug() << newImage.save("C:/Users/Mactarvish/Desktop/CropedImage.png");