1、效果展示

2、控件源码

import sys
from PyQt5.QtCore import Qt, QRect, QPoint, QVariantAnimation
from PyQt5.QtGui import QPainter, QColor
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout


class SwitchButton(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.setFixedSize(50, 30)
        self.checked = False
        self.setCursor(Qt.PointingHandCursor)
        self.animation = QVariantAnimation()
        self.animation.setDuration(80)  # 动画持续时间
        self.animation.setStartValue(0)
        self.animation.setEndValue(20)
        self.animation.valueChanged.connect(self.update)
        self.animation.finished.connect(self.onAnimationFinished)

    def setText(self, value):
        pass