Qt QWidget绘制圆角注意事项

1、产生黑边

painter.setPen(Qt::NoPen);    //  不设置画笔即可

2、背景不透明

this->setAttribute(Qt::WA_TranslucentBackground, true);

3、大致代码

this->setAttribute(Qt::WA_TranslucentBackground, true);

void widget::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.setPen(Qt::NoPen);
    painter.drawRoundedRect(this->rect(), 20, 20);
}

标签：圆角,NoPen,20,Qt,WA,QWidget,setPen,painter
来源： https://www.cnblogs.com/GEEK-ZHAO/p/16627327.html