如何从对话框窗口中检索数据到pyqt中的主窗口？

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_())

这是主要的文件代码

# -*- 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

我有一个主窗口形式，其上有一个lineedit l1和一个按钮B1。 单击按钮B1时，将打开一个新的对话框窗口。 对话框窗口有一个lineedit l2和一个按钮B2。 我在l2中写了一些东西，然后在对话框窗口中单击b2。 如何在主窗口中单击b2到l1时在l2中发送我的数据，并在按钮b2单击并将控制返回到主窗口后关闭对话窗口

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生成的设计类不是小部件，而是用于填充小部件。 因此，建议创建一个实现逻辑并使用该设计的类。

要点，如果要在按下QPushButton时关闭对话框，则将clicked信号连接到close()方法。 如果你想获得QDialog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，因为它生成自己的循环，当窗口关闭时，执行以下代码行。

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将其恢复

Answer 2

您可以将Dialog上的Button与主应用程序中的Function连接，就像您已经完成的那样。

像这样更新你的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()

同

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

您还应该小心变量的名称。 如果您使用已经占用的占位符，将来会出现错误。