如何使用模块在两个窗口之间传递自我

Question

我正在使用 PyQT5（Qt 设计器）学习 Python 3.7 版

我正在尝试使用模块定义标签的值，在窗口 1 中它调用该函数并且它可以工作，但是当我打开窗口 2 并单击按钮时它会触发该函数但传递当前窗口的 self (window 2) 没有 label 的地方，产生如下错误：

Traceback (most recent call last):
  File "\template\config.py", line 18, in returnMain
    fun1(self)
  File "\modulos\functions.py", line 7, in fun1
    lbl = int(self.ui.lblTest.text())
AttributeError: 'Ui_window2' object has no attribute 'lblTest'
Preciso que ele use na função o self da window 1.

我在小文件中复制了该错误，直到您单击第二个窗口中给出所描述错误的按钮为止。

目录中的代码结构如下：

关注文件。

run.py（用于启动程序）

   from PyQt5.QtWidgets import QApplication, QWidget, QPushButton
    import sys
    
    from template.main import MainScreen
    
    if __name__ == "__main__":
        app = QApplication(sys.argv)
        main = MainScreen()
        main.show()
        sys.exit(app.exec_())

gui/window1.py（janela 主体）

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_window1(object):
    def setupUi(self, win1):
        win1.setObjectName("win1")
        win1.resize(297, 219)
        self.centralwidget = QtWidgets.QWidget(win1)
        self.centralwidget.setObjectName("centralwidget")
        self.btnConfig = QtWidgets.QPushButton(self.centralwidget)
        self.btnConfig.setGeometry(QtCore.QRect(110, 150, 75, 23))
        self.btnConfig.setObjectName("btnConfig")
        self.lblTest = QtWidgets.QLabel(self.centralwidget)
        self.lblTest.setGeometry(QtCore.QRect(120, 70, 47, 13))
        self.lblTest.setObjectName("lblTest")
        win1.setCentralWidget(self.centralwidget)

        self.retranslateUi(win1)
        QtCore.QMetaObject.connectSlotsByName(win1)

    def retranslateUi(self, win1):
        _translate = QtCore.QCoreApplication.translate
        win1.setWindowTitle(_translate("win1", "Window 1"))
        self.btnConfig.setText(_translate("win1", "Open config"))
        self.lblTest.setText(_translate("win1", "0"))

gui/window2.py（设置窗口）

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_window2(object):
    def setupUi(self, win2):
        win2.setObjectName("win2")
        win2.resize(222, 241)
        self.centralwidget = QtWidgets.QWidget(win2)
        self.centralwidget.setObjectName("centralwidget")
        self.btnReturn = QtWidgets.QPushButton(self.centralwidget)
        self.btnReturn.setGeometry(QtCore.QRect(70, 120, 75, 23))
        self.btnReturn.setObjectName("btnReturn")
        win2.setCentralWidget(self.centralwidget)

        self.retranslateUi(win2)
        QtCore.QMetaObject.connectSlotsByName(win2)

    def retranslateUi(self, win2):
        _translate = QtCore.QCoreApplication.translate
        win2.setWindowTitle(_translate("win2", "Window 2"))
        self.btnReturn.setText(_translate("win2", "Return Main"))

modulos/functions.py（函数在哪里）

from PyQt5.QtWidgets import *
from template import main

def fun1(self):
    lbl = int(self.ui.lblTest.text())
    lbl = (lbl+1)
    self.ui.lblTest.setText(str(lbl))

template/config.py（我将在其中处理设置）

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from gui.window2 import *
from modulos.functions import fun1

class ConfigScreen(QMainWindow):
   
    def __init__(self,*args,**argsv):        
        super(ConfigScreen,self).__init__(*args,**argsv)
        self.ui = Ui_window2()
        self.ui.setupUi(self)
        self.ui.btnReturn.clicked.connect(self.returnMain)

    def returnMain(self):
        fun1(self)
        self.close()

template/main.py（主程序模块）

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import *
from gui.window1 import *
from template.config import ConfigScreen
from modulos.functions import fun1

class MainScreen(QMainWindow):
   
    def __init__(self,*args,**argsv):        
        super(MainScreen,self).__init__(*args,**argsv)
        self.ui = Ui_window1()
        self.ui.setupUi(self)
        self.ui.btnConfig.clicked.connect(self.openConfig)

        fun1(self)

    def openConfig(self):        
        self.config = ConfigScreen()
        self.config.show()

Answer 1

有很多不同的方法可以解决这个问题。这是一个可能的解决方案，尽量保持现有的结构。当请求返回时，从 ConfigScreen 发出自定义信号以与 MainScreen 通信，并将其插槽连接到 fun1(self)。

class ConfigScreen(QMainWindow):

    returnRequested = QtCore.pyqtSignal()
   
    def __init__(self,*args,**argsv):        
        super(ConfigScreen,self).__init__(*args,**argsv)
        self.ui = Ui_window2()
        self.ui.setupUi(self)
        self.ui.btnReturn.clicked.connect(self.returnMain)

    def returnMain(self):
        self.returnRequested.emit()
        self.close()

class MainScreen(QMainWindow):
   
    def __init__(self,*args,**argsv):        
        super(MainScreen,self).__init__(*args,**argsv)
        self.ui = Ui_window1()
        self.ui.setupUi(self)
        self.ui.btnConfig.clicked.connect(self.openConfig)

        fun1(self)

    def openConfig(self):        
        self.config = ConfigScreen()
        self.config.returnRequested.connect(lambda: fun1(self))
        self.config.show()

functions.py 也不需要from template import main。