一个页面需要设置属性this->setAttribute(Qt::WA_OpaquePaintEvent);但是设置了之后发现更新文字会出现之前的文字没有刷新掉和新文字重叠的问题
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget widget;
widget.setAttribute(Qt::WA_NoSystemBackground);
widget.resize(100,100);
QLabel* lable = new QLabel(&widget);
lable->setStyleSheet("color:blue");
lable->setText("1111111");
QPushButton button("button",&widget);
QVBoxLayout v;
v.addWidget(lable);
v.addWidget(&button);
widget.setLayout(&v);
QObject::connect(&button,&QPushButton::clicked,[=]()
{
lable->setText("222222222");
});
widget.show();
return a.exec();
}