在PyQt5中显示matplotlib绘制的图形

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import *
from plot_pyqt import PlotCanvas


class App(QMainWindow):

    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('PyQt5 matplotlib example')
        self.setGeometry(10,10,600,400)

        m = PlotCanvas(self)
        m.move(0,0)
        
        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

from PyQt5.QtWidgets import QSizePolicy
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
import numpy as np


class PlotCanvas(FigureCanvas):

    def __init__(self, parent=None,width=6,height=4):
        fig = Figure(figsize=(width, height), dpi=100)
        
        FigureCanvas.__init__(self, fig)
        self.setParent(parent)
        FigureCanvas.setSizePolicy(self,QSizePolicy.Expanding,QSizePolicy.Expanding)
        FigureCanvas.updateGeometry(self)
        
        self.plot()


    def plot(self):
        n = np.random.rand(100)
        data = np.sin(10*n)
        ax = self.figure.add_subplot(2,1,1)
        ax.set_title('PyQt Matplotlib Example')
        ax.plot(data, 'r-')
        ax2 = self.figure.add_subplot(2,1,2)
        ax2.plot(n, 'b-.')
        self.show()