PyQt5基础学习-动态显示窗口的缩放 1.QPropertyAnimation(设置对应的属性) 2.QAnimation.setDuration(设置时间间隔) 3.QAnimation.setStartValue(设置初始值) 4.QAnimation.setEndValue(设置结束值)

使用QPropertyAnimation动态的设置属性, 从而实现动画的效果
AnimWindow.py 

"""
用动画效果改变窗口尺寸

QPropertyAnimation


"""

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys

class AnimWindow(QWidget):
    def __init__(self):
        super(AnimWindow, self).__init__()
        self.OrigHeight = 50
        self.ChangeHeight = 150
        self.setGeometry(QRect(500, 400, 150, self.OrigHeight))
        self.btn = QPushButton('展开', self)
        self.btn.setGeometry(10, 10, 60, 35)
        self.btn.clicked.connect(self.change)

    def change(self):
        currentHeight = self.height()
        #根据当前的高度，来判断当前是收缩状态还是展开状态
        if self.OrigHeight == currentHeight:
            startHeight = self.OrigHeight
            endHeight = self.ChangeHeight
            self.btn.setText('收缩')
        else:
            startHeight = self.ChangeHeight
            endHeight = self.OrigHeight
            self.btn.setText("展开")
        #动态设置属性
        self.animation = QPropertyAnimation(self, b'geometry')
        self.animation.setDuration(500)
        self.animation.setStartValue(QRect(500, 400, 150, startHeight))
        self.animation.setEndValue(QRect(500, 400, 150, endHeight))
        self.animation.start()


if __name__ == "__main__":
    app = QApplication(sys.argv)
    win = AnimWindow()

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