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pyqt5中动画的使用详解

发布时间:2020-5-10 23:13

一、pyqt5中动画的继承关系图

二、关于QAbstractAnimation父类的认识

1、主要作用

2、功能作用

循环操作

时间操作

动画方向

动画状态state()

三、QPropertyAnimation属性动画的使用

主要用于实现某个属性值从x到y的动画变化

1、定义动画的主要步骤

2、构造函数使用方式

1.QPropertyAnimation(parent: QObject = None)

2.QPropertyAnimation(QObject, Union[QByteArray, bytes, bytearray], parent: QObject = None)

3、常见的属性

4、设置开始值和结束值

5、设置动画时长

6、启动动画

7、简单案例(位置的)

import sys
from PyQt5.Qt import *


class Window(QWidget):
  def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.setWindowTitle('动画')
    self.resize(500, 500)
    self.move(400, 200)
    self.btn = QPushButton(self)
    self.init_ui()

  def init_ui(self):
    self.btn.resize(100, 100)
    self.btn.move(0, 0)
    self.btn.setStyleSheet('QPushButton{border: none; background: pink;}')

    # 1.定义一个动画
    animation = QPropertyAnimation(self)
    animation.setTargetObject(self.btn)
    animation.setPropertyName(b'pos')
    # 使用另外一种构造函数方式创建
    # animation = QPropertyAnimation(self.btn, b'pos', self)

    # 2.设置属性值
    animation.setStartValue(QPoint(0, 0))
    animation.setEndValue(QPoint(400, 400))

    # 3.设置时长
    animation.setDuration(3000)

    # 4.启动动画
    animation.start()


if __name__ == "__main__":
  app = QApplication(sys.argv)
  window = Window()
  window.show()
  sys.exit(app.exec_())

8、使用插值的动画

import sys
from PyQt5.Qt import *


class Window(QWidget):
  def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.setWindowTitle('使用插值')
    self.resize(500, 500)
    self.move(400, 200)
    self.btn = QPushButton(self)
    self.init_ui()

  def init_ui(self):
    self.btn.resize(50, 50)
    self.btn.move(0, 0)
    self.btn.setStyleSheet('QPushButton{border: none; background: pink;}')
    
    # 1.创建动画
    animation = QPropertyAnimation(self.btn, b'pos', self)
    
    # 2.定义动画插值
    animation.setKeyValueAt(0, QPoint(0, 0))
    animation.setKeyValueAt(0.25, QPoint(450, 0))
    animation.setKeyValueAt(0.5, QPoint(450, 450))
    animation.setKeyValueAt(0.75, QPoint(0, 450))
    animation.setKeyValueAt(1, QPoint(0, 0))
    # 3.动画时长
    animation.setDuration(5000)
    # 4.启动动画
    animation.start()


if __name__ == "__main__":
  app = QApplication(sys.argv)
  window = Window()
  window.show()
  sys.exit(app.exec_())

四、QAnimationGroup动画组的使用

可以将一组动画, 同时播放或者按顺序播放

1、使用的步骤

2、动画运行几种状态

3、一个动画组的案例

import sys
from PyQt5.Qt import *


class Window(QWidget):
  def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.setWindowTitle('动画组')
    self.resize(500, 500)
    self.move(400, 200)
    self.btn1 = QPushButton(self)
    self.btn2 = QPushButton(self)
    self.init_ui()

  def init_ui(self):
    self.btn1.resize(50, 50)
    self.btn1.move(0, 0)
    self.btn1.setStyleSheet('QPushButton{border: none; background: pink;}')

    self.btn2.resize(50, 50)
    self.btn2.move(50, 50)
    self.btn2.setStyleSheet('border: none; background: cyan')

    # 按钮1的动画
    animation1 = QPropertyAnimation(self.btn1, b'pos', self)
    animation1.setKeyValueAt(0, QPoint(0, 0))
    animation1.setKeyValueAt(0.25, QPoint(450, 0))
    animation1.setKeyValueAt(0.5, QPoint(450, 450))
    animation1.setKeyValueAt(0.75, QPoint(0, 450))
    animation1.setKeyValueAt(1, QPoint(0, 0))
    animation1.setDuration(5000)
    # animation1.start()

    # 按钮2的动画
    animation2 = QPropertyAnimation(self.btn2, b'pos', self)
    animation2.setKeyValueAt(0, QPoint(50, 50))
    animation2.setKeyValueAt(0.25, QPoint(400, 50))
    animation2.setKeyValueAt(0.5, QPoint(400, 400))
    animation2.setKeyValueAt(0.75, QPoint(50, 400))
    animation2.setKeyValueAt(1, QPoint(50, 50))
    animation2.setDuration(3000)
    # animation2.start()

    animation_group = QSequentialAnimationGroup(self)
    animation_group.addAnimation(animation1)
    animation_group.addAnimation(animation2)
    animation_group.start()


if __name__ == "__main__":
  app = QApplication(sys.argv)
  window = Window()
  window.show()
  sys.exit(app.exec_())

五、关于QAbstractAnimation中事件的操作

1、启动动画start()

2、暂停动画pause()

3、继续启动动画resume()

4、停止动画stop()

5、基本案例

import sys
from PyQt5.Qt import *


class Window(QWidget):
  def __init__(self, *args, **kwargs):
    super().__init__(*args, **kwargs)
    self.setWindowTitle('动画组')
    self.resize(500, 500)
    self.move(400, 200)
    self.btn1 = QPushButton(self)
    self.btn2 = QPushButton(self)
    self.init_ui()

  def init_ui(self):
    self.btn1.resize(50, 50)
    self.btn1.move(0, 0)
    self.btn1.setStyleSheet('QPushButton{border: none; background: pink;}')

    self.btn2.resize(50, 50)
    self.btn2.move(50, 50)
    self.btn2.setStyleSheet('border: none; background: cyan')

    # 按钮1的动画
    animation1 = QPropertyAnimation(self.btn1, b'pos', self)
    animation1.setKeyValueAt(0, QPoint(0, 0))
    animation1.setKeyValueAt(0.25, QPoint(450, 0))
    animation1.setKeyValueAt(0.5, QPoint(450, 450))
    animation1.setKeyValueAt(0.75, QPoint(0, 450))
    animation1.setKeyValueAt(1, QPoint(0, 0))
    animation1.setDuration(5000)
    # animation1.start()

    # 按钮2的动画
    animation2 = QPropertyAnimation(self.btn2, b'pos', self)
    animation2.setKeyValueAt(0, QPoint(50, 50))
    animation2.setKeyValueAt(0.25, QPoint(400, 50))
    animation2.setKeyValueAt(0.5, QPoint(400, 400))
    animation2.setKeyValueAt(0.75, QPoint(50, 400))
    animation2.setKeyValueAt(1, QPoint(50, 50))
    animation2.setDuration(8000)
    # animation2.start()

    animation_group = QParallelAnimationGroup(self)
    animation_group.addAnimation(animation1)
    animation_group.addAnimation(animation2)
    animation_group.start()

    self.btn1.clicked.connect(animation_group.pause)
    self.btn2.clicked.connect(animation_group.resume)


if __name__ == "__main__":
  app = QApplication(sys.argv)
  window = Window()
  window.show()
  sys.exit(app.exec_())

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