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我有一个 QWidget，我已将其设置为具有透明背景，并通过 paintEvent() 绘制了背景。

我已经向这个添加了子小部件，并且在渲染时似乎自定义paintEvent（）无法绘制完整的背景，或者子小部件以某种方式覆盖它并阻止成功渲染。

截屏

通过 uic.loadUi('path.ui', self) 添加子小部件

示例代码：

    def __init__(self):
        super().__init__()

        # QGridLayout inside with 12 cells as shown on screenshot
        uic.loadUi(r'path.ui', self)

        self.setAttribute(QtCore.Qt.WidgetAttribute.WA_TranslucentBackground, True)
        self.setAttribute(QtCore.Qt.WidgetAttribute.WA_AlwaysStackOnTop, True)
        self.setWindowFlags(QtCore.Qt.WindowFlags.Window)
        self.setWindowOpacity(1.0)
        self.setWindowFlags(QtCore.Qt.WindowFlags.FramelessWindowHint)
        self.setBorderMargin(5)
        self.setCornerMargin(20)
        self.resize(600, 400)

        self.layout().setSpacing(20)
        self.layout().setVerticalSpacing(20)
        self.layout().setContentsMargins(15, 15, 15, 15)

    def paintEvent(self, event):       
        painter = QPainter(self)
        painter.setRenderHint(QPainter.RenderHints.Antialiasing)

        pen = QPen(QColor(8553090), 1)
        painter.setPen(pen)
        brush = QBrush(QColor(14079702))
        painter.setBrush(brush)

        path = QPainterPath()
        rect = event.rect()
        rect.adjust(2, 2, -2, -2)
        #path.addRoundedRect(QRectF(rect), 35, 35)
        path.addRoundedRect(QRectF(rect), 35, 35)

        painter.fillPath(path, painter.brush())
        painter.strokePath(path, painter.pen())

        super().paintEvent(event)

    def keyPressEvent(self, event):
        if event.keyCombination().key() == QtCore.Qt.Key.Key_Escape:
            self.close()
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