如何在QPainter中使用QPropertyAnimation绘制圆弧

from PyQt5.QtCore import Qt, QPropertyAnimation, QRectF
from PyQt5.QtGui import QPainter, QColor, QPen, QBrush
from PyQt5.QtWidgets import QWidget, QApplication

class ArcWidget(QWidget):
    def __init__(self, parent=None):
        super(ArcWidget, self).__init__(parent)
        self.angle = 0

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)
        painter.setPen(QPen(Qt.black, 2))
        painter.setBrush(QBrush(Qt.red))

        rect = QRectF(10, 10, 200, 200)
        startAngle = 90 * 16  # 以1/16度为单位
        spanAngle = self.angle * 16
        painter.drawArc(rect, startAngle, spanAngle)

    def setAngle(self, value):
        self.angle = value
        self.update()

arcWidget = ArcWidget()
animation = QPropertyAnimation(arcWidget, b"angle")

animation.setDuration(2000)  # 动画持续时间为2秒
animation.setStartValue(0)  # 起始值为0
animation.setEndValue(180)  # 结束值为180

animation.start()

from PyQt5.QtCore import Qt, QPropertyAnimation, QRectF
from PyQt5.QtGui import QPainter, QColor, QPen, QBrush
from PyQt5.QtWidgets import QWidget, QApplication

class ArcWidget(QWidget):
    def __init__(self, parent=None):
        super(ArcWidget, self).__init__(parent)
        self.angle = 0

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.setRenderHint(QPainter.Antialiasing)
        painter.setPen(QPen(Qt.black, 2))
        painter.setBrush(QBrush(Qt.red))

        rect = QRectF(10, 10, 200, 200)
        startAngle = 90 * 16  # 以1/16度为单位
        spanAngle = self.angle * 16
        painter.drawArc(rect, startAngle, spanAngle)

    def setAngle(self, value):
        self.angle = value
        self.update()

if __name__ == "__main__":
    import sys

    app = QApplication(sys.argv)
    arcWidget = ArcWidget()

    animation = QPropertyAnimation(arcWidget, b"angle")
    animation.setDuration(2000)
    animation.setStartValue(0)
    animation.setEndValue(180)
    animation.start()

    arcWidget.show()
    sys.exit(app.exec_())