PyQt - 如何将标签从编辑窗口链接和更新到我的主窗口

【问题标题】：PyQt - How to link and update the label from edit Window to my main windowPyQt - 如何将标签从编辑窗口链接和更新到我的主窗口
【发布时间】：2019-07-31 20:15:15
【问题描述】：

我必须创建一个 Inventory 程序，我遇到了麻烦，我想要编辑按钮，当它被点击时，会弹出另一个窗口，并且会发生编辑或更新标签。

我想要一个保存按钮，在从编辑窗口更改标签并单击更新后，它将把更改从编辑窗口传递到主窗口。

这是主窗口的代码，点击编辑按钮会弹出，源自Qt Designer：

从 PyQt5 导入 QtCore、QtGui、QtWidgets 从editForm导入Ui_editWindow

class Ui_MainWindow(object): def openWindow(self): self.window = QtWidgets.QMainWindow() self.ui = Ui_editWindow() self.ui.setupUi(self.window) self.window.show()

   def setupUi(self, MainWindow):
       MainWindow.setObjectName("MainWindow")
       MainWindow.resize(641, 661)
       self.centralwidget = QtWidgets.QWidget(MainWindow)
       self.centralwidget.setObjectName("centralwidget")
       self.gridLayout_3 = QtWidgets.QGridLayout(self.centralwidget)
       self.gridLayout_3.setContentsMargins(10, 10, 10, 10)
       self.gridLayout_3.setHorizontalSpacing(5)
       self.gridLayout_3.setObjectName("gridLayout_3")
       self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
       sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
       sizePolicy.setHorizontalStretch(0)
       sizePolicy.setVerticalStretch(0)
       sizePolicy.setHeightForWidth(self.tabWidget.sizePolicy(). hasHeightForWidth())
       self.tabWidget.setSizePolicy(sizePolicy)
       self.tabWidget.setObjectName("tabWidget")
       self.widget = QtWidgets.QWidget()
       self.widget.setObjectName("widget")
       self.gridLayout = QtWidgets.QGridLayout(self.widget)
       self.gridLayout.setContentsMargins(0, 0, 0, 0)
       self.gridLayout.setObjectName("gridLayout")
       self.scrollArea_2 = QtWidgets.QScrollArea(self.widget)
       self.scrollArea_2.setWidgetResizable(True)
       self.scrollArea_2.setObjectName("scrollArea_2")
       self.scrollAreaWidgetContents_2 = QtWidgets.QWidget()
       self.scrollAreaWidgetContents_2.setGeometry(QtCore.QRect(0, 0, 595, 554))`
      `self.scrollAreaWidgetContents_2.setObjectName ("scrollAreaWidgetContents_2")
       self.lineEdit = QtWidgets.QLineEdit(self.scrollAreaWidgetContents_2)
       self.lineEdit.setGeometry(QtCore.QRect(135, 527, 133, 20))
       self.lineEdit.setObjectName("lineEdit")
       self.pushButton = QtWidgets.QPushButton(self.scrollAreaWidgetContents_2)
       self.pushButton.setGeometry(QtCore.QRect(515, 526, 75, 23))
       self.pushButton.setObjectName("pushButton")`

       self.pushButton.clicked.connect(self.openWindow)

       self.label_2 = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
       self.label_2.setGeometry(QtCore.QRect(30, 40, 41, 16))
       self.label_2.setObjectName("label_2")
       self.label = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
       self.label.setGeometry(QtCore.QRect(20, 10, 69, 16))
       font = QtGui.QFont()
       font.setPointSize(10)
       font.setBold(True)
       font.setWeight(75)
       self.label.setFont(font)
       self.label.setObjectName("label")
       self.label_3 = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
       self.label_3.setGeometry(QtCore.QRect(150, 10, 121, 16))
       font = QtGui.QFont()
       font.setPointSize(10)
       font.setBold(True)
       font.setWeight(75)
       self.label_3.setFont(font)
       self.label_3.setObjectName("label_3")
       self.lineEdit_2 = QtWidgets.QLineEdit(self.scrollAreaWidgetContents_2)
       self.lineEdit_2.setGeometry(QtCore.QRect(120, 210, 113, 20))
       self.lineEdit_2.setPlaceholderText("")
       self.lineEdit_2.setObjectName("lineEdit_2")
       self.scrollArea_2.setWidget(self.scrollAreaWidgetContents_2)
       self.gridLayout.addWidget(self.scrollArea_2, 0, 0, 1, 1)
       self.tabWidget.addTab(self.widget, "")
       self.tab_2 = QtWidgets.QWidget()
       self.tab_2.setObjectName("tab_2")
       self.gridLayout_2 = QtWidgets.QGridLayout(self.tab_2)
       self.gridLayout_2.setContentsMargins(0, 0, 0, 0)
       self.gridLayout_2.setObjectName("gridLayout_2")
       self.scrollArea = QtWidgets.QScrollArea(self.tab_2)
       self.scrollArea.setWidgetResizable(True)
       self.scrollArea.setObjectName("scrollArea")
       self.scrollAreaWidgetContents = QtWidgets.QWidget()
       self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 595, 554))
       self.scrollAreaWidgetContents.setObjectName ("scrollAreaWidgetContents")
       self.scrollArea.setWidget(self.scrollAreaWidgetContents)
       self.gridLayout_2.addWidget(self.scrollArea, 0, 0, 1, 1)
       self.tabWidget.addTab(self.tab_2, "")
       self.gridLayout_3.addWidget(self.tabWidget, 0, 1, 1, 1)
       MainWindow.setCentralWidget(self.centralwidget)
       self.menubar = QtWidgets.QMenuBar(MainWindow)
       self.menubar.setGeometry(QtCore.QRect(0, 0, 641, 21))
       self.menubar.setObjectName("menubar")
       MainWindow.setMenuBar(self.menubar)
       self.statusbar = QtWidgets.QStatusBar(MainWindow)
       self.statusbar.setObjectName("statusbar")
       MainWindow.setStatusBar(self.statusbar)

       self.retranslateUi(MainWindow)
       self.tabWidget.setCurrentIndex(0)
       QtCore.QMetaObject.connectSlotsByName(MainWindow)

   def retranslateUi(self, MainWindow):
       _translate = QtCore.QCoreApplication.translate
       MainWindow.setWindowTitle(_translate("MainWindow", "Automated System Inventory"))
       self.pushButton.setText(_translate("MainWindow", "Edit"))
       self.label_2.setText(_translate("MainWindow", "RC Small"))
       self.label.setText(_translate("MainWindow", "Item Name"))
       self.label_3.setText(_translate("MainWindow", "Number of Stocks"))
       self.tabWidget.setTabText(self.tabWidget.indexOf(self.widget), _translate("MainWindow", "Stocks and Price"))
       self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Profit"))

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_())

这是编辑窗口的代码，源自Qt Designer：

从 PyQt5 导入 QtCore、QtGui、QtWidgets

class Ui_editWindow(object): def setupUi(self, editWindow): editWindow.setObjectName("editWindow") editWindow.setEnabled(True) editWindow.resize(400, 350) editWindow.setContextMenuPolicy(QtCore.Qt.DefaultContextMenu) self.centralwidget = QtWidgets.QWidget(editWindow) self.centralwidget.setObjectName("centralwidget") self.label = QtWidgets.QLabel(self.centralwidget) self.label.setGeometry(QtCore.QRect(160, 20, 71, 31)) font = QtGui.QFont() font.setPointSize(10) font.setBold(True) font.setWeight(75) self.label.setFont(font) self.label.setObjectName("label") self.pushButton = QtWidgets.QPushButton(self.centralwidget) self.pushButton.setGeometry(QtCore.QRect(300, 270, 75, 23)) self.pushButton.setObjectName("pushButton") self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget) self.pushButton_2.setGeometry(QtCore.QRect(220, 270, 75, 23)) self.pushButton_2.setObjectName("pushButton_2") self.label_2 = QtWidgets.QLabel(self.centralwidget) self.label_2.setGeometry(QtCore.QRect(10, 60, 47, 13)) self.label_2.setObjectName("label_2") self.lineEdit = QtWidgets.QLineEdit(self.centralwidget) self.lineEdit.setGeometry(QtCore.QRect(70, 60, 113, 20)) self.lineEdit.setObjectName("lineEdit") editWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(editWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 400, 21)) self.menubar.setObjectName("menubar") editWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(editWindow) self.statusbar.setObjectName("statusbar") editWindow.setStatusBar(self.statusbar)

       self.retranslateUi(editWindow)
       self.lineEdit.textEdited['QString'].connect(self.label_2.setText)
       self.pushButton.clicked.connect(self.label_2.clear)
       QtCore.QMetaObject.connectSlotsByName(editWindow)`



   def retranslateUi(self, editWindow):
       _translate = QtCore.QCoreApplication.translate
       editWindow.setWindowTitle(_translate("editWindow", "MainWindow"))
       self.label.setText(_translate("editWindow", "EDIT FORM"))
       self.pushButton.setText(_translate("editWindow", "Clear"))
       self.pushButton_2.setText(_translate("editWindow", "Update"))
       self.label_2.setText(_translate("editWindow", "Coke")
       self.lineEdit.setPlaceholderText(_translate("editWindow", "Item Name"))`

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

【问题讨论】：

    标签： python pyqt5


    【解决方案1】：

    试试看：

    ma​​in.py

    from PyQt5 import QtCore, QtGui, QtWidgets 
from editForm import Ui_editWindow


class Ui_MainWindow(object):
#    def openWindow(self):
#        self.window = QtWidgets.QMainWindow()
#        self.ui = Ui_editWindow()
#        self.ui.setupUi(self.window)
#        self.window.show()

    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(641, 661)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout_3 = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout_3.setContentsMargins(10, 10, 10, 10)
        self.gridLayout_3.setHorizontalSpacing(5)
        self.gridLayout_3.setObjectName("gridLayout_3")
        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.tabWidget.sizePolicy(). hasHeightForWidth())
        self.tabWidget.setSizePolicy(sizePolicy)
        self.tabWidget.setObjectName("tabWidget")
        self.widget = QtWidgets.QWidget()
        self.widget.setObjectName("widget")
        self.gridLayout = QtWidgets.QGridLayout(self.widget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.scrollArea_2 = QtWidgets.QScrollArea(self.widget)
        self.scrollArea_2.setWidgetResizable(True)
        self.scrollArea_2.setObjectName("scrollArea_2")
        self.scrollAreaWidgetContents_2 = QtWidgets.QWidget()
        self.scrollAreaWidgetContents_2.setGeometry(QtCore.QRect(0, 0, 595, 554))
        self.scrollAreaWidgetContents_2.setObjectName ("scrollAreaWidgetContents_2")
        self.lineEdit = QtWidgets.QLineEdit(self.scrollAreaWidgetContents_2)
        self.lineEdit.setGeometry(QtCore.QRect(135, 527, 133, 20))
        self.lineEdit.setObjectName("lineEdit")
        self.pushButton = QtWidgets.QPushButton(self.scrollAreaWidgetContents_2)
        self.pushButton.setGeometry(QtCore.QRect(515, 526, 75, 23))
        self.pushButton.setObjectName("pushButton")

#        self.pushButton.clicked.connect(self.openWindow)

        self.label_2 = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
        self.label_2.setGeometry(QtCore.QRect(30, 40, 41, 16))
        self.label_2.setObjectName("label_2")
        self.label = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
        self.label.setGeometry(QtCore.QRect(20, 10, 69, 16))
        font = QtGui.QFont()
        font.setPointSize(10)
        font.setBold(True)
        font.setWeight(75)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_3 = QtWidgets.QLabel(self.scrollAreaWidgetContents_2)
        self.label_3.setGeometry(QtCore.QRect(150, 10, 121, 16))
        font = QtGui.QFont()
        font.setPointSize(10)
        font.setBold(True)
        font.setWeight(75)
        self.label_3.setFont(font)
        self.label_3.setObjectName("label_3")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.scrollAreaWidgetContents_2)
        self.lineEdit_2.setGeometry(QtCore.QRect(120, 210, 113, 20))
        self.lineEdit_2.setPlaceholderText("")
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.scrollArea_2.setWidget(self.scrollAreaWidgetContents_2)
        self.gridLayout.addWidget(self.scrollArea_2, 0, 0, 1, 1)
        self.tabWidget.addTab(self.widget, "")
        self.tab_2 = QtWidgets.QWidget()
        self.tab_2.setObjectName("tab_2")
        self.gridLayout_2 = QtWidgets.QGridLayout(self.tab_2)
        self.gridLayout_2.setContentsMargins(0, 0, 0, 0)
        self.gridLayout_2.setObjectName("gridLayout_2")
        self.scrollArea = QtWidgets.QScrollArea(self.tab_2)
        self.scrollArea.setWidgetResizable(True)
        self.scrollArea.setObjectName("scrollArea")
        self.scrollAreaWidgetContents = QtWidgets.QWidget()
        self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 595, 554))
        self.scrollAreaWidgetContents.setObjectName ("scrollAreaWidgetContents")
        self.scrollArea.setWidget(self.scrollAreaWidgetContents)
        self.gridLayout_2.addWidget(self.scrollArea, 0, 0, 1, 1)
        self.tabWidget.addTab(self.tab_2, "")
        self.gridLayout_3.addWidget(self.tabWidget, 0, 1, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 641, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.tabWidget.setCurrentIndex(0)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Automated System Inventory"))
        self.pushButton.setText(_translate("MainWindow", "Edit"))
        self.label_2.setText(_translate("MainWindow", "RC Small"))
        self.label.setText(_translate("MainWindow", "Item Name"))
        self.label_3.setText(_translate("MainWindow", "Number of Stocks"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.widget), _translate("MainWindow", "Stocks and Price"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Profit"))


class MyWindow(QtWidgets.QMainWindow, Ui_MainWindow):              # ++++
    def __init__(self):
        super().__init__()
        self.setupUi(self)

        self.pushButton.clicked.connect(self.openWindow)

    def openWindow(self):
        self.window = QtWidgets.QMainWindow()
        self.ui     = Ui_editWindow()
        self.ui.setupUi(self.window)
        self.window.show()

        self.ui.pushButton_2.clicked.connect(self.updateWindow)

    def updateWindow(self): 
        self.lineEdit.setText(self.ui.lineEdit.text())
# or ???
        self.lineEdit_2.setText(self.ui.lineEdit.text())     


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

    editForm.py

    from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_editWindow(object):
    def setupUi(self, editWindow):
        editWindow.setObjectName("editWindow")
        editWindow.setEnabled(True)
        editWindow.resize(400, 350)
        editWindow.setContextMenuPolicy(QtCore.Qt.DefaultContextMenu)
        self.centralwidget = QtWidgets.QWidget(editWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(160, 20, 71, 31))
        font = QtGui.QFont()
        font.setPointSize(10)
        font.setBold(True)
        font.setWeight(75)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(300, 270, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setGeometry(QtCore.QRect(220, 270, 75, 23))
        self.pushButton_2.setObjectName("pushButton_2")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(10, 60, 67, 13))   # (10, 60, 47, 13)
        self.label_2.setObjectName("label_2")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(90, 60, 113, 20)) # (70, 60, 113, 20))
        self.lineEdit.setObjectName("lineEdit")
        editWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(editWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 400, 21))
        self.menubar.setObjectName("menubar")
        editWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(editWindow)
        self.statusbar.setObjectName("statusbar")
        editWindow.setStatusBar(self.statusbar)

        self.retranslateUi(editWindow)
        self.lineEdit.textEdited['QString'].connect(self.label_2.setText)
        self.pushButton.clicked.connect(self.label_2.clear)
        self.pushButton.clicked.connect(self.lineEdit.clear)                 # +++

        QtCore.QMetaObject.connectSlotsByName(editWindow)

    def retranslateUi(self, editWindow):
        _translate = QtCore.QCoreApplication.translate
        editWindow.setWindowTitle(_translate("editWindow", "MainWindow"))
        self.label.setText(_translate("editWindow", "EDIT FORM"))
        self.pushButton.setText(_translate("editWindow", "Clear"))
        self.pushButton_2.setText(_translate("editWindow", "Update"))
        self.label_2.setText(_translate("editWindow", "Coke"))
        self.lineEdit.setPlaceholderText(_translate("editWindow", "Item Name"))


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

    【讨论】：

    • 非常感谢您的帮助，非常感谢。
    • 这里只是添加了一点，如果我再添加一组Line Edit，更新的代码还是一样吗？
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