Qt中使用stylesheet方式将按钮设置成圆角按钮，代码如下：

setStyleSheet("border:2px groove gray;border-radius:10px;padding:2px 4px;");

如pushButton如下用法：

pushButton->setStyleSheet("border:2px groove gray;border-radius:10px;padding:2px 4px;");

更多>setStyleSheet用法如下：

qApp->setStyleSheet("QLineEdit {

myDialog->setStyleSheet("QLineEdit { background-color: yellow }");

myDialog->setStyleSheet("QLineEdit#nameEdit { background-color: yellow }");

nameEdit->setStyleSheet("background-color: yellow");

nameEdit->setStyleSheet("color: blue; background-color: yellow");

nameEdit->setStyleSheet("color: blue;"

                         "background-color: yellow;"

                         "selection-color: yellow;"

                         "selection-background-color: blue;");