在PyQt5中插入matplotlab绘图面板

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QSizePolicy, QPushButton
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
import random
 
class App(QMainWindow):
    def __init__(self):
        super().__init__()
        self.title = '示例图像'
        self.initUI()
        self.m.plot()  #调用PlotCanvas的函数画图

    def initUI(self):
        self.setWindowTitle(self.title)
        self.setGeometry(100, 100, 900, 400) 
        m = PlotCanvas(self, width=7, height=4)
        m.move(0,0)
        self.m = m
        button = QPushButton('PyQt5 button', self)
        button.setToolTip('This s an example button')
        button.move(700,0)
        button.resize(140,100)
        self.show()
 
class PlotCanvas(FigureCanvas):
    def __init__(self, parent=None, width=7, height=4, dpi=100):
        fig = Figure(figsize=(width, height), dpi=dpi) #matplotlab的Figure类
        self.axes = fig.add_subplot(111)
 
        FigureCanvas.__init__(self, fig)
        self.setParent(parent)
 
        FigureCanvas.setSizePolicy(self,
                QSizePolicy.Expanding,
                QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)
 
    def plot(self):
        data = [random.random() for i in range(25)]
        #ax = self.figure.clear()
        #ax = self.figure.add_subplot(111)
        ax = self.figure.axes[0]  #获取原有的第一个axes
        ax.plot(data, 'r-')  #画图折线图，红色----
        ax.set_title('PyQt Matplotlib Example')
        self.draw()
 
if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

添加一个继承自FigureCanvas的PlotCanvas类。

PlotCanvas类放置在PyQt窗口面板中。

在PlotCanvas类中调用matplotlab的Figure类，再通过获取axes，通过axes画图。