painter.setFont(QtGui.QFont("Arial",9));
painter.drawText(ix, bar.high_price + 3, "A")
字体大小为9时，一片白，为3时可以看到A的形状，但是倒的，字体大小为2时，什么也看不到了。

class LineItem(CandleItem):
""""""

def __init__(self, manager: BarManager):
    """"""
    super().__init__(manager)

    self.white_pen: QtGui.QPen = pg.mkPen(color=(255, 255, 255), width=1)
def _draw_bar_picture(self, ix: int, bar: BarData) -> QtGui.QPicture:
    """"""
    last_bar = self._manager.get_bar(ix - 1)

    # Create objects
    picture = QtGui.QPicture()
    painter = QtGui.QPainter(picture)

    # Set painter color
    painter.setPen(self.white_pen)

    # Draw Line
    end_point = QtCore.QPointF(ix, bar.close_price)
    if last_bar:
        start_point = QtCore.QPointF(ix - 1, last_bar.close_price)
    else:
        start_point = end_point

    painter.drawLine(start_point, end_point)
    # Finish
    #painter.end()
    #painter.setFont(QtGui.QFont("Arial", 9));
    #测试用矩形，参考的K线实体部分，在这里面写字写不出来，
    rect = QtCore.QRectF(
        ix - BAR_WIDTH,
        bar.open_price,
        BAR_WIDTH * 3,
        bar.close_price - bar.open_price-0.02
    )
    #painter.drawRect(rect)#可以画
   # painter.drawText(0,0, 'AAAAA')  # 不可以
    #painter.drawText(rect, '33339')  # 不显示
    painter.drawText(rect,1, str("2"));#不显示
    painter.end()
    return picture

是在线上活动run.php里面连接收盘价的线这个类里面添加的

老师您好，painter.drawLine是在K线上画线，想在K线上方写几个标注，用painter.drawText写字不显示。能否教一下。不知道QQ群里能否问这样的问题，先在这里提问了