QT 按钮切换背景图片

使用setStyleSheet()函数进行设置：

如将一个QPushButton类的按钮设置为：

ui->btn_name->setStyleSheet("QPushButton{background-image: url(:/images/call_up.bmp);}"

"QPushButton:hover{background-image: url(:/images/call_hov.bmp);}"

"QPushButton:pressed{background-image: url(:/images/call_down.bmp);}");

或者设置为字符串的形式，在初始化时调用：

如

QString str="QPushButton#btn_name{background-image: url(:/images/call_up.bmp)}"

"QPushButton#btn_name:hover{background-image: url(:/images/call_hov.bmp);}"

"QPushButton#btn_name:pressed{background-image: url(:/images/call_down.bmp);}";