04 QT设置背景色

#include <QPalette>#include <QColor>void MyForm::set_form_color(){   this->setAutoFillBackground(true);   QPalette pale = this->palette();   QColor BKG_COL(0,0,0);   pale.setColor(this->backgroundRole(),BKG_COL);//正确写法1   //pale.setColor(this->backgroundRole(),Qt::blue);//正确写法1   //pale.setColor(QPalette::Window,Qt::darkRed);//这种写法没有效果   this->setPalette(pale);}