Python 从另一个文件中的按钮切换QStackWidget中的widget

我有两个py文件。有一个主窗口内有一个QStackedWidget，setCurrentWidget是根据条件设置的。另一个文件有一个小部件，该小部件动态添加到堆叠的小部件中，并在单击主窗口中的按钮时设置为当前小部件。 第二个文件中的小部件有一个对话框，其中有一个按钮。我试图做的是，在点击对话框内的按钮时，对话框应该关闭，setCurrentWidget将根据条件进行设置，小部件将从堆叠的小部件中移除

以下是我尝试过的：

mainwindow.py

import sys
import os
import pathlib
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *


list1 = ["item1", "item2", "item3"]


class MainWindow(QWidget):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.resize(400, 300)

        self.toolbar = QWidget()
        self.toolbar.setFixedHeight(30)
        self.toolbar.setStyleSheet("background: grey;")

        self.button = QPushButton("Click here!")
        t_layout = QHBoxLayout()
        t_layout.setMargin(0)
        t_layout.addWidget(self.button)
        self.toolbar.setLayout(t_layout)

        self.p1_label = QLabel("Such empty!")
        self.p1_label.setStyleSheet("font-size: 30px;")
        self.p1_label.setAlignment(Qt.AlignCenter)

        self.p2_widget = QWidget()
        self.p2_widget.setStyleSheet("background: orange;")

        self.sw = QStackedWidget()
        self.sw.addWidget(self.p1_label)
        self.sw.addWidget(self.p2_widget)

        if not list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
           self.sw.setCurrentWidget(self.p2_widget)

        self.mw_layout = QVBoxLayout()
        self.mw_layout.addWidget(self.toolbar)
        self.mw_layout.addWidget(self.sw)
        self.setLayout(self.mw_layout)

        def switch_widget():
            import widget_test
            p3 = widget_test.widget()
            self.sw.addWidget(p3)
            self.sw.setCurrentWidget(p3)

        self.button.clicked.connect(switch_widget)

    def switch_back(self):
        import widget_test
        p3 = widget_test.widget()
        mwin = MainWindow()
        sw_ = mwin.sw
        sw_.removeWidget(p3)
        p1 = mwin.p1_label
        p2 = mwin.p2_widget
        if not list1:
            sw_.setCurrentWidget(p1)
        else:
            sw_.setCurrentWidget(p2)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec_())

import sys
import os
import pathlib
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *
from widget_test import widget



list1 = ["item1", "item2", "item3"]


class MainWindow(QWidget):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.resize(400, 300)

        self.toolbar = QWidget()
        self.toolbar.setFixedHeight(30)
        self.toolbar.setStyleSheet("background: grey;")

        self.button = QPushButton("Click here!")
        t_layout = QHBoxLayout()
        t_layout.setMargin(0)
        t_layout.addWidget(self.button)
        self.toolbar.setLayout(t_layout)

        self.p1_label = QLabel("Such empty!")
        self.p1_label.setStyleSheet("font-size: 30px;")
        self.p1_label.setAlignment(Qt.AlignCenter)

        self.p2_widget = QWidget()
        self.p2_widget.setStyleSheet("background: orange;")

        self.p3 = None

        self.sw = QStackedWidget()
        self.sw.addWidget(self.p1_label)
        self.sw.addWidget(self.p2_widget)

        if not list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
           self.sw.setCurrentWidget(self.p2_widget)

        self.mw_layout = QVBoxLayout()
        self.mw_layout.addWidget(self.toolbar)
        self.mw_layout.addWidget(self.sw)
        self.setLayout(self.mw_layout)

        self.button.clicked.connect(self.switch_widget)

    def switch_widget(self):
        self.p3 = widget()
        self.p3.update_signal.connect(self.switch_back)
        self.sw.addWidget(self.p3)
        self.sw.setCurrentWidget(self.p3)


    def switch_back(self):
        self.sw.removeWidget(self.p3)
        if list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
            self.sw.setCurrentWidget(self.p2_widget)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec_())

widget.py

import sys
import os  
import pathlib
import datetime
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *


class widget(QWidget):
    def __init__(self):
        super(widget, self).__init__()
        self.setStyleSheet("background: teal;")

        widget_label = QLabel("fluid dynamics is cool")
        show_pop_up = QPushButton("show pop up")

        pop_up = QDialog(self)
        pop_up_label = QLabel("click below to, hopefully, get outta here")
        get_outta_here = QPushButton("get outta here")
        pop_up_layout = QVBoxLayout()
        pop_up_layout.addWidget(pop_up_label)
        pop_up_layout.addWidget(get_outta_here)
        pop_up.setLayout(pop_up_layout)

        def show_popup():
            pop_up.show()

        def get_out():
            from main_test import MainWindow
            MainWindow.switch_back(self)
            pop_up.reject()

        get_outta_here.clicked.connect(get_out)

        show_pop_up.clicked.connect(show_popup)

        widget_layout = QVBoxLayout()
        widget_layout.addWidget(widget_label)
        widget_layout.addWidget(show_pop_up)
        self.setLayout(widget_layout)

import sys
import os
import pathlib
import datetime
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtCore import Signal


class widget(QWidget):
    update_signal = Signal()
    def __init__(self):
        super(widget, self).__init__()
        self.setStyleSheet("background: teal;")

        widget_label = QLabel("fluid dynamics is cool")
        show_pop_up = QPushButton("show pop up")

        pop_up = QDialog(self)
        pop_up_label = QLabel("click below to, hopefully, get outta here")
        get_outta_here = QPushButton("get outta here")
        pop_up_layout = QVBoxLayout()
        pop_up_layout.addWidget(pop_up_label)
        pop_up_layout.addWidget(get_outta_here)
        pop_up.setLayout(pop_up_layout)

        def show_popup():
            pop_up.show()

        def get_out():
            self.update_signal.emit()
            pop_up.reject()

        get_outta_here.clicked.connect(get_out)

        show_pop_up.clicked.connect(show_popup)

        widget_layout = QVBoxLayout()
        widget_layout.addWidget(widget_label)
        widget_layout.addWidget(show_pop_up)
        self.setLayout(widget_layout)

---

我可以将代码合并在一起并使其工作，但我正在努力保持目录的干净。

这里有很多事情要做，但让我们把它分解一下

主要的问题似乎是模块之间的杂耍。尽管前后导入模块似乎很有吸引力，但实际上并不起作用。您需要寻找的是您可以利用的内置功能

另一个更大的问题是，您正在重新分配一些属性，尽管您确实不应该这样做。您还应该重新查看用于分配

.setCurrentWidget

的条件。当前条件为

，如果列表1不存在，请执行此操作。否则，请执行其他操作

。另外，

switch\u小部件

应该在

def\uuu init\uuu（self）：

之外

我重写了代码的一些部分，以使其与信号一起工作，作为您的示例

mainwindow.py

import sys
import os
import pathlib
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *


list1 = ["item1", "item2", "item3"]


class MainWindow(QWidget):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.resize(400, 300)

        self.toolbar = QWidget()
        self.toolbar.setFixedHeight(30)
        self.toolbar.setStyleSheet("background: grey;")

        self.button = QPushButton("Click here!")
        t_layout = QHBoxLayout()
        t_layout.setMargin(0)
        t_layout.addWidget(self.button)
        self.toolbar.setLayout(t_layout)

        self.p1_label = QLabel("Such empty!")
        self.p1_label.setStyleSheet("font-size: 30px;")
        self.p1_label.setAlignment(Qt.AlignCenter)

        self.p2_widget = QWidget()
        self.p2_widget.setStyleSheet("background: orange;")

        self.sw = QStackedWidget()
        self.sw.addWidget(self.p1_label)
        self.sw.addWidget(self.p2_widget)

        if not list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
           self.sw.setCurrentWidget(self.p2_widget)

        self.mw_layout = QVBoxLayout()
        self.mw_layout.addWidget(self.toolbar)
        self.mw_layout.addWidget(self.sw)
        self.setLayout(self.mw_layout)

        def switch_widget():
            import widget_test
            p3 = widget_test.widget()
            self.sw.addWidget(p3)
            self.sw.setCurrentWidget(p3)

        self.button.clicked.connect(switch_widget)

    def switch_back(self):
        import widget_test
        p3 = widget_test.widget()
        mwin = MainWindow()
        sw_ = mwin.sw
        sw_.removeWidget(p3)
        p1 = mwin.p1_label
        p2 = mwin.p2_widget
        if not list1:
            sw_.setCurrentWidget(p1)
        else:
            sw_.setCurrentWidget(p2)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec_())

import sys
import os
import pathlib
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *
from widget_test import widget



list1 = ["item1", "item2", "item3"]


class MainWindow(QWidget):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.resize(400, 300)

        self.toolbar = QWidget()
        self.toolbar.setFixedHeight(30)
        self.toolbar.setStyleSheet("background: grey;")

        self.button = QPushButton("Click here!")
        t_layout = QHBoxLayout()
        t_layout.setMargin(0)
        t_layout.addWidget(self.button)
        self.toolbar.setLayout(t_layout)

        self.p1_label = QLabel("Such empty!")
        self.p1_label.setStyleSheet("font-size: 30px;")
        self.p1_label.setAlignment(Qt.AlignCenter)

        self.p2_widget = QWidget()
        self.p2_widget.setStyleSheet("background: orange;")

        self.p3 = None

        self.sw = QStackedWidget()
        self.sw.addWidget(self.p1_label)
        self.sw.addWidget(self.p2_widget)

        if not list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
           self.sw.setCurrentWidget(self.p2_widget)

        self.mw_layout = QVBoxLayout()
        self.mw_layout.addWidget(self.toolbar)
        self.mw_layout.addWidget(self.sw)
        self.setLayout(self.mw_layout)

        self.button.clicked.connect(self.switch_widget)

    def switch_widget(self):
        self.p3 = widget()
        self.p3.update_signal.connect(self.switch_back)
        self.sw.addWidget(self.p3)
        self.sw.setCurrentWidget(self.p3)


    def switch_back(self):
        self.sw.removeWidget(self.p3)
        if list1:
            self.sw.setCurrentWidget(self.p1_label)
        else:
            self.sw.setCurrentWidget(self.p2_widget)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    mw = MainWindow()
    mw.show()
    sys.exit(app.exec_())

widget.py

import sys
import os  
import pathlib
import datetime
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *


class widget(QWidget):
    def __init__(self):
        super(widget, self).__init__()
        self.setStyleSheet("background: teal;")

        widget_label = QLabel("fluid dynamics is cool")
        show_pop_up = QPushButton("show pop up")

        pop_up = QDialog(self)
        pop_up_label = QLabel("click below to, hopefully, get outta here")
        get_outta_here = QPushButton("get outta here")
        pop_up_layout = QVBoxLayout()
        pop_up_layout.addWidget(pop_up_label)
        pop_up_layout.addWidget(get_outta_here)
        pop_up.setLayout(pop_up_layout)

        def show_popup():
            pop_up.show()

        def get_out():
            from main_test import MainWindow
            MainWindow.switch_back(self)
            pop_up.reject()

        get_outta_here.clicked.connect(get_out)

        show_pop_up.clicked.connect(show_popup)

        widget_layout = QVBoxLayout()
        widget_layout.addWidget(widget_label)
        widget_layout.addWidget(show_pop_up)
        self.setLayout(widget_layout)

import sys
import os
import pathlib
import datetime
from PySide2.QtWidgets import *
from PySide2 import *
from PySide2.QtCore import *
from PySide2.QtGui import *
from PySide2.QtCore import Signal


class widget(QWidget):
    update_signal = Signal()
    def __init__(self):
        super(widget, self).__init__()
        self.setStyleSheet("background: teal;")

        widget_label = QLabel("fluid dynamics is cool")
        show_pop_up = QPushButton("show pop up")

        pop_up = QDialog(self)
        pop_up_label = QLabel("click below to, hopefully, get outta here")
        get_outta_here = QPushButton("get outta here")
        pop_up_layout = QVBoxLayout()
        pop_up_layout.addWidget(pop_up_label)
        pop_up_layout.addWidget(get_outta_here)
        pop_up.setLayout(pop_up_layout)

        def show_popup():
            pop_up.show()

        def get_out():
            self.update_signal.emit()
            pop_up.reject()

        get_outta_here.clicked.connect(get_out)

        show_pop_up.clicked.connect(show_popup)

        widget_layout = QVBoxLayout()
        widget_layout.addWidget(widget_label)
        widget_layout.addWidget(show_pop_up)
        self.setLayout(widget_layout)

---

最后，检查命名和其他“次要”细节。

效果很好。附言：这是一个快速的尝试，从我的原始代码中复制一些太大而无法在这里发布的东西。谢谢