How to add style via setStyleSheet() without losing orignal style in Qt?

Question

I Konw I can use setStyleSheet() to set style in Qt.But I encountered a problem,when I used setStyleSheet() twice first styles lost,which a

Answer 1

You can set stylesheets without QLabel tag:

setStyleSheet("color:red;");

After setting one stylesheet property, you can add another property like:

setStyleSheet( styleSheet().append(QString("border-image:url(……);")) );