我最近几天一直在查看stackoverflow的帖子,以解决我遇到的问题,尝试了几种方法后,我仍然无法使我的代码工作。 我正在尝试创建一个简单的GUI,在按下按钮时可以显示一个图形。 当我运行主模块时,程序会启动。 但是当我点击我的“plot”按钮时,我会收到以下错误:
RuntimeError: wrapped C/C++ object of type FigureCanvasQTAgg has been deleted
现在我读到这与删除C ++对象有关,而python包装器仍然存在,但我似乎无法解决此问题。 我最关心的是尽可能保持GUI的模块化,因为我想扩展下面显示的示例代码。 有人有解决我的问题的好方法吗?
main.py
import sys
from PyQt5.QtWidgets import *
from GUI import ui_main
app = QApplication(sys.argv)
ui = ui_main.Ui_MainWindow()
ui.show()
sys.exit(app.exec_())
ui_main.py
from PyQt5.QtWidgets import *
from GUI import frame as fr
class Ui_MainWindow(QMainWindow):
def __init__(self):
super(Ui_MainWindow, self).__init__()
self.central_widget = Ui_CentralWidget()
self.setCentralWidget(self.central_widget)
self.initUI()
def initUI(self):
self.setGeometry(400,300,1280,600)
self.setWindowTitle('Test GUI')
class Ui_CentralWidget(QWidget):
def __init__(self):
super(Ui_CentralWidget, self).__init__()
self.gridLayout = QGridLayout(self)
'''Plot button'''
self.plotButton = QPushButton('Plot')
self.plotButton.setToolTip('Click to create a plot')
self.gridLayout.addWidget(self.plotButton, 1, 0)
'''plotFrame'''
self.plotFrame = fr.PlotFrame()
self.gridLayout.addWidget(self.plotFrame,0,0)
'''Connect button'''
self.plotButton.clicked.connect(fr.example_figure)
frame.py
from PyQt5.QtWidgets import *
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
import matplotlib.pyplot as plt
class PlotFrame(QFrame):
def __init__(self):
super(PlotFrame, self).__init__()
self.gridLayout = QGridLayout(self)
self.setFrameShape(QFrame.Box)
self.setFrameShadow(QFrame.Raised)
self.setLineWidth(3)
self.figure = plt.figure(figsize=(5, 5))
self.canvas = FigureCanvas(self.figure)
self.gridLayout.addWidget(self.canvas,1,1)
def example_figure():
plt.cla()
ax = PlotFrame().figure.add_subplot(111)
x = [i for i in range(100)]
y = [i ** 0.5 for i in x]
ax.plot(x, y, 'r.-')
ax.set_title('Square root plot')
PlotFrame().canvas.draw()