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PyQt5 close Parent window & child window from child window

[英]PyQt5 close Parent window & child window from child window

 原文  2020-08-11 15:14:25  6   1    python/ pyqt5/ qt-designer

问题描述

我使用设计器制作了一个 pyqt5 GUI 并转换为 python 代码。 我希望第一个 window 像这样打开另一个 window 等等。

赢1->赢2->赢3

现在我在win3中有一个按钮，点击它时必须关闭windows[win1，win2，win3（本身）]并且必须再次重新启动win1。

我尝试定义从win1打开win2和从win 2打开win3都没有引发错误，尽管对我没有用

这个怎么做？ 请帮我。

赢1

from PyQt5 import QtCore, QtGui, QtWidgets
from win_2 import *

class Ui_Win1(object):

def setupUi(self, Win1):
    Win1.setObjectName("Win1")
    Win1.resize(640, 480)
    Win1.setStyleSheet("*{background:black;}")
    self.centralwidget = QtWidgets.QWidget(Win1)
    self.centralwidget.setObjectName("centralwidget")
    self.frame = QtWidgets.QFrame(self.centralwidget)
    self.frame.setGeometry(QtCore.QRect(110, 70, 361, 301))
    self.frame.setStyleSheet("border: 2px solid white ;\n")
    self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
    self.frame.setObjectName("frame")
    self.pushbutton1 = QtWidgets.QPushButton(self.frame)
    self.pushbutton1.setGeometry(QtCore.QRect(120, 120, 131, 41))
    self.pushbutton1.setStyleSheet("background:white;")
    self.pushbutton1.setObjectName("pushbutton1")
    Win1.setCentralWidget(self.centralwidget)

    self.retranslateUi(Win1)
    QtCore.QMetaObject.connectSlotsByName(Win1)

    self.pushbutton1.clicked.connect(lambda: self.openwin2())  # calling function

def retranslateUi(self, Win1):
    _translate = QtCore.QCoreApplication.translate
    Win1.setWindowTitle(_translate("Win1", "MainWindow"))
    self.pushbutton1.setText(_translate("Win1", "Go to Win 2"))


def openwin2(self):                   #Function for opening win2
    Win2 = QtWidgets.QMainWindow()
    ui = Ui_Win2()
    ui.setupUi(Win2)
    Win2.show()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Win1 = QtWidgets.QMainWindow()
    ui = Ui_Win1()
    ui.setupUi(Win1)
    Win1.show()
    sys.exit(app.exec_())

赢2

from PyQt5 import QtCore, QtGui, QtWidgets
from win_3 import *

class Ui_Win2(object):
    def setupUi(self, Win2):
        Win2.setObjectName("Win2")
        Win2.resize(640, 480)
        Win2.setStyleSheet("*{background:black;}")
        self.centralwidget = QtWidgets.QWidget(Win2)
        self.centralwidget.setObjectName("centralwidget")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setGeometry(QtCore.QRect(10, 20, 361, 301))
        self.frame.setStyleSheet("border: 2px solid white ;\n")
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.pushbutton2 = QtWidgets.QPushButton(self.frame)
        self.pushbutton2.setGeometry(QtCore.QRect(120, 120, 131, 41))
        self.pushbutton2.setStyleSheet("background:white;")
        self.pushbutton2.setObjectName("pushbutton2")
        Win2.setCentralWidget(self.centralwidget)

        self.retranslateUi(Win2)
        QtCore.QMetaObject.connectSlotsByName(Win2)

        self.pushbutton2.clicked.connect(self.openwin3)  # calling function

    def retranslateUi(self, Win2):
        _translate = QtCore.QCoreApplication.translate
        Win2.setWindowTitle(_translate("Win2", "MainWindow"))
        self.pushbutton2.setText(_translate("Win2", "Go to Win 3"))

    def openwin3(self):                   #Function for opening win3
        Win3 = QtWidgets.QMainWindow()
        ui = Ui_Win3()
        ui.setupUi(Win3)
        Win3.show()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Win2 = QtWidgets.QMainWindow()
    ui = Ui_Win2()
    ui.setupUi(Win2)
    Win2.show()
    sys.exit(app.exec_())

赢3

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Win3(object):
    def setupUi(self, Win3):
        Win3.setObjectName("Win3")
        Win3.resize(640, 480)
        Win3.setStyleSheet("*{background:black;}")
        self.centralwidget = QtWidgets.QWidget(Win3)
        self.centralwidget.setObjectName("centralwidget")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setGeometry(QtCore.QRect(250, 140, 361, 301))
        self.frame.setStyleSheet("border: 2px solid white ;\n")
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.pushbutton3 = QtWidgets.QPushButton(self.frame)
        self.pushbutton3.setGeometry(QtCore.QRect(120, 130, 131, 41))
        self.pushbutton3.setStyleSheet("background:white;")
        self.pushbutton3.setObjectName("pushbutton3")
        Win3.setCentralWidget(self.centralwidget)

        self.retranslateUi(Win3)
        QtCore.QMetaObject.connectSlotsByName(Win3)

    def retranslateUi(self, Win3):
        _translate = QtCore.QCoreApplication.translate
        Win3.setWindowTitle(_translate("Win3", "MainWindow"))
        self.pushbutton3.setText(_translate("Win3", "Close and Relaunch"))

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Win3 = QtWidgets.QMainWindow()
    ui = Ui_Win3()
    ui.setupUi(Win3)
    Win3.show()
    sys.exit(app.exec_())

1 个解决方案

解决方案1
 0  2020-08-16 10:23:09

不要修改由 Qt Designer 生成的代码，而是创建另一个继承自相应小部件的 class 并使用初始 class 来填充它。

win_1.py

from PyQt5 import QtCore, QtGui, QtWidgets
from win_2 import Ui_Win2                                              # +++
from win_3 import Ui_Win3                                              # +++


class Ui_Win1(object):
    def setupUi(self, Win1):
        Win1.setObjectName("Win1")
        Win1.resize(640, 480)
        Win1.setStyleSheet("*{background:black;}")
        self.centralwidget = QtWidgets.QWidget(Win1)
        self.centralwidget.setObjectName("centralwidget")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setGeometry(QtCore.QRect(110, 70, 361, 301))
        self.frame.setStyleSheet("border: 2px solid white ;\n")
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.pushbutton1 = QtWidgets.QPushButton(self.frame)
        self.pushbutton1.setGeometry(QtCore.QRect(120, 120, 131, 41))
        self.pushbutton1.setStyleSheet("background:white;")
        self.pushbutton1.setObjectName("pushbutton1")
        Win1.setCentralWidget(self.centralwidget)

        self.retranslateUi(Win1)
        QtCore.QMetaObject.connectSlotsByName(Win1)

    def retranslateUi(self, Win1):
        _translate = QtCore.QCoreApplication.translate
        Win1.setWindowTitle(_translate("Win1", "MainWindow"))
        self.pushbutton1.setText(_translate("Win1", "Go to Win 2"))


class Win3(QtWidgets.QMainWindow, Ui_Win3):
    def __init__(self, parent=None):
        super(Win3, self).__init__(parent)
        self.parent = parent
        self.setupUi(self)
        self.setWindowTitle("Win3")
        self.pushbutton3.clicked.connect(self.openwin1)
        
    def openwin1(self):                           # +++ Function for opening win1
        self.parent.show()
        self.hide()        
        

class Win2(QtWidgets.QMainWindow, Ui_Win2):
    def __init__(self, parent=None):
        super(Win2, self).__init__(parent)
        self.parent = parent
        self.setupUi(self)
        self.setWindowTitle("Win2")
        self.pushbutton2.clicked.connect(self.openwin3)  # calling function
        
    def openwin3(self):                          # Function for opening win3
        self.win3 = Win3(self.parent)
        self.win3.show()        
        self.hide()
        

class Win1(QtWidgets.QMainWindow, Ui_Win1):
    def __init__(self):
        super().__init__()
        
        self.setupUi(self)
        self.setWindowTitle("Win1")
        self.pushbutton1.clicked.connect(self.openwin2)  # +++ calling function

    def openwin2(self):                   # Function for opening win2
        self.win2 = Win2(self)
        self.win2.show()
        self.hide()
        

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    win1 = Win1()
    win1.show()
    sys.exit(app.exec_())

win_2.py

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Win2(object):
    def setupUi(self, Win2):
        Win2.setObjectName("Win2")
        Win2.resize(640, 480)
        Win2.setStyleSheet("*{background:black;}")
        self.centralwidget = QtWidgets.QWidget(Win2)
        self.centralwidget.setObjectName("centralwidget")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setGeometry(QtCore.QRect(10, 20, 361, 301))
        self.frame.setStyleSheet("border: 2px solid white ;\n")
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.pushbutton2 = QtWidgets.QPushButton(self.frame)
        self.pushbutton2.setGeometry(QtCore.QRect(120, 120, 131, 41))
        self.pushbutton2.setStyleSheet("background:white;")
        self.pushbutton2.setObjectName("pushbutton2")
        Win2.setCentralWidget(self.centralwidget)

        self.retranslateUi(Win2)
        QtCore.QMetaObject.connectSlotsByName(Win2)

    def retranslateUi(self, Win2):
        _translate = QtCore.QCoreApplication.translate
        Win2.setWindowTitle(_translate("Win2", "MainWindow"))
        self.pushbutton2.setText(_translate("Win2", "Go to Win 3"))

win_3.py

from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_Win3(object):
    def setupUi(self, Win3):
        Win3.setObjectName("Win3")
        Win3.resize(640, 480)
        Win3.setStyleSheet("*{background:black;}")
        self.centralwidget = QtWidgets.QWidget(Win3)
        self.centralwidget.setObjectName("centralwidget")
        self.frame = QtWidgets.QFrame(self.centralwidget)
        self.frame.setGeometry(QtCore.QRect(250, 140, 361, 301))
        self.frame.setStyleSheet("border: 2px solid white ;\n")
        self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
        self.frame.setObjectName("frame")
        self.pushbutton3 = QtWidgets.QPushButton(self.frame)
        self.pushbutton3.setGeometry(QtCore.QRect(120, 130, 131, 41))
        self.pushbutton3.setStyleSheet("background:white;")
        self.pushbutton3.setObjectName("pushbutton3")
        Win3.setCentralWidget(self.centralwidget)

        self.retranslateUi(Win3)
        QtCore.QMetaObject.connectSlotsByName(Win3)

    def retranslateUi(self, Win3):
        _translate = QtCore.QCoreApplication.translate
        Win3.setWindowTitle(_translate("Win3", "MainWindow"))
        self.pushbutton3.setText(_translate("Win3", "Close and Relaunch"))

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