摘要：
https://blog.csdn.net/weixin_43469047/article/details/115607083https://blog.csdn.net/qq_28053421/article/details/113828372https://blog.csdn.net/weixin_43469047/article/details/117733574?utm_source=app
https://blog.csdn.net/weixin_43469047/article/details/115607083
https://blog.csdn.net/qq_28053421/article/details/113828372
https://blog.csdn.net/weixin_43469047/article/details/117733574?utm_source=app&app_version=4.5.4
https://www.cnblogs.com/laoniubile/p/5904817.html
1. 界面设计简单创建一个界面：一个 GraphicsView 和 一个 PushButton
# from PySide2.QtWidgets import QApplication, QMessageBox from PySide2.QtWidgets import QApplication, QMainWindow, QGraphicsScene, QFileDialog, QMessageBox from PySide2.QtUiTools import QUiLoader import sys import numpy as np import matplotlib from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas # from matplotlib.figure import Figure import matplotlib.pyplot as plt matplotlib.use("Qt5Agg") # 声明使用QT5 class MyFigureCanvas(FigureCanvas): ''' 通过继承FigureCanvas类，使得该类既是一个PyQt5的Qwidget，又是一个matplotlib的FigureCanvas，这是连接pyqt5与matplotlib的关键 ''' def __init__(self, parent=None, width=10, height=5, xlim=(0, 2500), ylim=(-2, 2), dpi=100): # 创建一个Figure fig = plt.Figure(figsize=(width, height), dpi=dpi, tight_layout=True) # tight_layout: 用于去除画图时两边的空白 FigureCanvas.__init__(self, fig) # 初始化父类 self.setParent(parent) self.axes = fig.add_subplot(111) # 调用figure下面的add_subplot方法，类似于matplotlib.pyplot下面的subplot方法 self.axes.spines['top'].set_visible(False) # 去掉上面的横线 self.axes.spines['right'].set_visible(False) self.axes.set_xlim(xlim) self.axes.set_ylim(ylim) class Stats: def __init__(self): # 从文件中加载UI定义 # 从 UI 定义中动态 创建一个相应的窗口对象 # 注意：里面的控件对象也成为窗口对象的属性了 # 比如 self.ui.button , self.ui.textEdit self.ui = QUiLoader().load('mtplt.ui') # self.ui.button.clicked.connect(self.handleCalc) # 初始化 gv_visual_data 的显示 self.gv_visual_data_content = MyFigureCanvas(width=self.ui.graphicsView.width() / 101, height=self.ui.graphicsView.height() / 101, xlim=(0, 2*np.pi), ylim=(-1, 1)) # 实例化一个FigureCanvas self.plot_cos() self.ui.btn_sin.clicked.connect(self.plot_sin) def plot_cos(self): x = np.arange(0, 2 * np.pi, np.pi / 100) y = np.cos(x) self.gv_visual_data_content.axes.plot(x, y) self.gv_visual_data_content.axes.set_title('cos()') # 加载的图形（FigureCanvas）不能直接放到graphicview控件中，必须先放到graphicScene，然后再把graphicscene放到graphicview中 self.graphic_scene = QGraphicsScene() # 创建一个QGraphicsScene self.graphic_scene.addWidget(self.gv_visual_data_content) # 把图形放到QGraphicsScene中，注意：图形是作为一个QWidget放到放到QGraphicsScene中的 self.ui.graphicsView.setScene(self.graphic_scene) # 把QGraphicsScene放入QGraphicsView self.ui.graphicsView.show() # 调用show方法呈现图形 def plot_sin(self): x = np.arange(0, 2 * np.pi, np.pi / 100) y = np.sin(x) self.gv_visual_data_content.axes.clear() # 由于图片需要反复绘制，所以每次绘制前清空，然后绘图 self.gv_visual_data_content.axes.plot(x, y) self.gv_visual_data_content.axes.set_title('sin()') self.gv_visual_data_content.draw() # 刷新画布显示图片，否则不刷新显示 app = QApplication([]) stats = Stats() stats.ui.show() app.exec_()