如何在pyqt中从对话框window检索数据到mainwindow？

Question

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

# Form implementation generated from reading ui file 'maintest.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from test import Ui_Dialog

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_MainWindow(object):

    def connect(self):
        self.updateWindow=QtGui.QDialog()
        self.ui_update=Ui_Dialog()
        self.ui_update.setupUi(self.updateWindow)
        self.updateWindow.show()

    def setupUi(self, MainWindow):
        MainWindow.setObjectName(_fromUtf8("MainWindow"))
        MainWindow.resize(391, 248)
        self.centralwidget = QtGui.QWidget(MainWindow)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.lineEdit = QtGui.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(80, 60, 113, 27))
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
        self.pushButton = QtGui.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(80, 100, 112, 34))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtGui.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 391, 31))
        self.menubar.setObjectName(_fromUtf8("menubar"))
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtGui.QStatusBar(MainWindow)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
        self.pushButton.setText(_translate("MainWindow", "B1", None))
        self.pushButton.clicked.connect(self.connect)

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

这是主文件代码

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

# Form implementation generated from reading ui file 'test.ui'
#
# Created by: PyQt4 UI code generator 4.11.4
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Dialog(object):

    def save_data(self):
        d= self.lineEdit.text()
        print(d)

    def setupUi(self, Dialog):
        Dialog.setObjectName(_fromUtf8("Dialog"))
        Dialog.resize(397, 219)
        self.pushButton = QtGui.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(110, 100, 112, 34))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.lineEdit = QtGui.QLineEdit(Dialog)
        self.lineEdit.setGeometry(QtCore.QRect(110, 60, 113, 27))
        self.lineEdit.setText(_fromUtf8(""))
        self.lineEdit.setObjectName(_fromUtf8("lineEdit"))

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

    def retranslateUi(self, Dialog):
        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))
        self.pushButton.setText(_translate("Dialog", "B2", None))
        self.pushButton.clicked.connect(self.save_data)

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Dialog = QtGui.QDialog()
    ui = Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    sys.exit(app.exec_())

这是对话框文件代码

我有一个主 window 表单，上面有一个 lineedit l1 和一个按钮 B1。单击按钮 B1 会打开一个新对话框 window。对话框 window 有一个 lineedit l2 和一个按钮 B2。我在 l2 中写了一些东西，然后在对话框 window 中单击 b2。我如何在单击 b2 时将 l2 中的数据发送到 mainwindow 中的 l1，并在单击按钮 b2 并将 return 控件控制到 mainwindow [=13 后关闭对话框 window =]

Answer 1

始终建议不要弄乱生成Qt Designer 的代码，最好创建另一个实现逻辑的文件。此外，Qt Designer 生成的设计 class 不是小部件，但用于填充小部件。所以建议创建一个class实现逻辑并使用设计。

进入正题，如果您想在按下 QPushButton 时关闭对话框，请将 clicked 信号连接到 close() 方法。如果您想获取 QDialog 的一些数据，最简单的形式之一是首先使用 exec_() 方法显示对话框，因为它会生成自己的循环，并且当 window 是关闭，执行下面几行代码。

class Dialog(QDialog, Ui_Dialog):
    def __init__(self, parent=None):
        QDialog.__init__(self, parent)
        self.setupUi(self)
        self.pushButton.clicked.connect(self.close)

class MainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        QMainWindow.__init__(self, parent)
        self.setupUi(self)
        self.pushButton.clicked.connect(self.onClicked)

    def onClicked(self):
        updateDialog = Dialog()
        updateDialog.exec_()
        self.lineEdit.setText(updateDialog.lineEdit.text())

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

注意：我建议删除您在设计中所做的更改或使用 pyuic 将它们取回

Answer 2

您可以将对话框上的按钮与主应用程序中的函数连接起来，就像您已经完成的那样。

像这样更新您的 connect 例程：

def connect(self):
        self.updateWindow=QtGui.QDialog()
        self.ui_update=Ui_Dialog()
        self.ui_update.setupUi(self.updateWindow)
        self.ui_update.pushButton.connect(self.printContent)
        self.updateWindow.show()

和

def printContent(self):
     print self.ui_update.lineEdit.text()

您还应该注意变量的名称。如果您使用已经占用的占位符，将来会出现错误。

如何在pyqt中从对话框window检索数据到mainwindow？

How to retrieve data from dialog window to mainwindow in pyqt?

python

pyqt

pyqt4

python-3.x