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python - 需要帮助理解 PyQt5 中的继承

问题描述

我正在尝试将我的代码组织成类。在下面的示例中，B需要C继承按钮的名称，A以便按钮在按下时回显语句。为了让我让它正常工作，我必须创建Dummy和继承B，C然后在Dummy. 这似乎不是我应该这样做的方式。在 PyQt5 中使用多个类是否有“更好”或“更被接受”的方式？

继承.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'inheritance.ui'
#
# Created by: PyQt5 UI code generator 5.9.2
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(452, 246)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.b_pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.b_pushButton.setGeometry(QtCore.QRect(40, 50, 151, 81))
        self.b_pushButton.setObjectName("b_pushButton")
        self.c_pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.c_pushButton.setGeometry(QtCore.QRect(230, 50, 151, 81))
        self.c_pushButton.setObjectName("c_pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 452, 22))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.b_pushButton.setText(_translate("MainWindow", "B"))
        self.c_pushButton.setText(_translate("MainWindow", "C"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

主脚本：

import sys
from PyQt5.QtWidgets import QMainWindow, QApplication
from inheritance import Ui_MainWindow

class A(QMainWindow):
    def __init__(self):
        super(A, self).__init__()

        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

class B(A):
    def __init__(self):
        super(B, self).__init__()

        self.ui.b_pushButton.clicked.connect(self.pushB)

    def pushB(self):
        print('You pushed the "B" button')
        print()

class C(A):
    def __init__(self):
        super(C, self).__init__()

        self.ui.c_pushButton.clicked.connect(self.pushC)

    def pushC(self):
        print('You pushed the "C" button')
        print()

class Dummy(B, C):
    pass

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

标签： pythoninheritancepyqt5

解决方案

我最终做了 eyllanesc 建议的事情。我最初试图将与 B 和 C 相关的所有内容都保留在他们自己的类中，因为我的实际代码很长，但这样做可以。

import sys
from PyQt5.QtWidgets import QMainWindow, QApplication
from inheritance import Ui_MainWindow

class A(QMainWindow):
    def __init__(self):
        super(A, self).__init__()

        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        self.B = B()
        self.C = C()

        self.ui.b_pushButton.clicked.connect(self.B.pushB)
        self.ui.c_pushButton.clicked.connect(self.C.pushC)

class B:
    def pushB(self):
        print('You pushed the "B" button')
        print()

class C:
    def pushC(self):
        print('You pushed the "C" button')
        print()

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

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