如何在QDialog中访问QLineEdit？

Question

我创建了一个包含QLineEdit的自定义对话框。当某些条件在主屏幕上匹配时，对话框打开并允许用户输入。返回主屏幕后，需要抓取并使用该输入。你知道吗

在QtDesigner中，我创建了I对话框（上面已经有Ok和Cancel按钮），并添加了一个对象名为lineEdit的QLineEdit。你知道吗

另外，我正在使用三个.py文件一个是main\u应用程序，它正在导入另外两个文件mainwindow文件和dialog文件（从.ui文件转换而来） 下面是我在主应用程序文件中打开对话框的方法。你知道吗

def open_dialog(self):
    Dialog = QtWidgets.QDialog()
    ui = sub_search.Ui_Dialog()
    ui.setupUi(Dialog)
    Dialog.show()
    resp = Dialog.exec_()

    if resp == QtWidgets.QDialog.Accepted:
        print("Accepted!")           #this place will be used to do something more once I have 
                                      #userinupt from dialog box

直到这段代码运行良好，我不知道如何返回和使用用户输入 下面是我试图从对话框返回lineEdit输入的代码

    def get_text_from(self):
    if self.lineEdit.text() != "" and self.buttonBox.accepted():
        swc = self.lineEdit.text()
        return swc
    elif self.lineEdit.text() == "" and self.buttonBox.accepted():
        warning_message(title="Warning!", message="please provide swc clli,thanks!")
    else:
        pass

下面是完整的代码，我想根据用户输入设置更多过滤器 主要_应用程序类型你知道吗

from PyQt5 import QtWidgets
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMessageBox
import pandas as pd
from pyqt_master_data import search, sub_search

pd.set_option('display.max_rows', None, 'display.max_columns', None)

master_data = pd.read_excel('Master_data.xlsx', 'Shares')

class SearchTool(search.Ui_main, QtWidgets.QMainWindow):

    def __init__(self):
        super(SearchTool, self).__init__()
        self.setupUi(self)
        self.push()

    def master_data_search(self):
        if self.lineEdit.text() != "":
            day = self.lineEdit.text().strip()
            if day.upper() in "TUESDAY":
               self.open_dialog()
            else:
               day_df = master_data[(master_data.Day.str.contains(day, 
case=False, na=False))]
                model = PandasModel(day_df)
                self.tableView.setModel(model)

    def push(self):
        self.pushButton.clicked.connect(self.master_data_search)

    def open_dialog(self):
        Dialog = QtWidgets.QDialog()
        ui = sub_search.Ui_Dialog()
        ui.setupUi(Dialog)
        Dialog.show()
        resp = Dialog.exec_()

        if resp == QtWidgets.QDialog.Accepted:
            print("Accepted!")
            sub_search.Ui_Dialog.get_text_from() #do something here
        else:
           print('rejected')


def warning_message(title="Warning!", message="Please provide input, 
thanks!"):
    QMessageBox.information(None, title, message)


class PandasModel(QtCore.QAbstractTableModel):
    """
    Class to populate a table view with a pandas dataframe
    """
    def __init__(self, data, parent=None):
        QtCore.QAbstractTableModel.__init__(self, parent)
        self._data = data

    def rowCount(self, parent=None):
        return len(self._data.values)

    def columnCount(self, parent=None):
        return self._data.columns.size

    def data(self, index, role=QtCore.Qt.DisplayRole):
        if index.isValid():
            if role == QtCore.Qt.DisplayRole:
                return str(self._data.values[index.row()][index.column()])
        return None

    def headerData(self, col, orientation, role):
        if orientation == QtCore.Qt.Horizontal and role == 
QtCore.Qt.DisplayRole:
            return self._data.columns[col]
        return None


if __name__ == "__main__":
    app = QtWidgets.QApplication([])
    qt_app = SearchTool()
    qt_app.show()
    app.exec_()

你知道吗搜索.py你知道吗

from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_main(object):
def setupUi(self, main):
    main.setObjectName("main")
    main.resize(855, 886)
    main.setMouseTracking(True)
    main.setTabletTracking(True)
    self.centralwidget = QtWidgets.QWidget(main)
    self.centralwidget.setObjectName("centralwidget")
    self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.centralwidget)
    self.verticalLayout_2.setObjectName("verticalLayout_2")
    self.frame = QtWidgets.QFrame(self.centralwidget)
    self.frame.setFrameShape(QtWidgets.QFrame.Box)
    self.frame.setFrameShadow(QtWidgets.QFrame.Plain)
    self.frame.setObjectName("frame")
    self.verticalLayout = QtWidgets.QVBoxLayout(self.frame)
    self.verticalLayout.setObjectName("verticalLayout")
    self.label = QtWidgets.QLabel(self.frame)
    self.label.setAlignment(QtCore.Qt.AlignCenter)
    self.label.setObjectName("label")
    self.verticalLayout.addWidget(self.label)
    self.lineEdit = QtWidgets.QLineEdit(self.frame)
    self.lineEdit.setClearButtonEnabled(True)
    self.lineEdit.setObjectName("lineEdit")
    self.verticalLayout.addWidget(self.lineEdit)
    self.pushButton = QtWidgets.QPushButton(self.frame)
    font = QtGui.QFont()
    font.setBold(True)
    font.setItalic(True)
    font.setWeight(75)
    self.pushButton.setFont(font)
    self.pushButton.setObjectName("pushButton")
    self.verticalLayout.addWidget(self.pushButton)
    self.verticalLayout_2.addWidget(self.frame)
    self.frame_2 = QtWidgets.QFrame(self.centralwidget)
    self.frame_2.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.frame_2.setFrameShadow(QtWidgets.QFrame.Raised)
    self.frame_2.setObjectName("frame_2")
    self.verticalLayout_3 = QtWidgets.QVBoxLayout(self.frame_2)
    self.verticalLayout_3.setObjectName("verticalLayout_3")
    self.frame_3 = QtWidgets.QFrame(self.frame_2)
    self.frame_3.setMouseTracking(True)
    self.frame_3.setTabletTracking(True)
    self.frame_3.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.frame_3.setFrameShadow(QtWidgets.QFrame.Raised)
    self.frame_3.setObjectName("frame_3")
    self.verticalLayout_4 = QtWidgets.QVBoxLayout(self.frame_3)
    self.verticalLayout_4.setObjectName("verticalLayout_4")
    self.tableView = QtWidgets.QTableView(self.frame_3)
    self.tableView.setMouseTracking(True)
    self.tableView.setTabletTracking(True)
    self.tableView.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.tableView.setFrameShadow(QtWidgets.QFrame.Plain)
    self.tableView.setDragEnabled(True)
    self.tableView.setDefaultDropAction(QtCore.Qt.CopyAction)
    self.tableView.setSortingEnabled(True)
    self.tableView.setObjectName("tableView")
    self.verticalLayout_4.addWidget(self.tableView)
    self.verticalLayout_3.addWidget(self.frame_3)
    self.verticalLayout_2.addWidget(self.frame_2)
    main.setCentralWidget(self.centralwidget)
    self.menubar = QtWidgets.QMenuBar(main)
    self.menubar.setGeometry(QtCore.QRect(0, 0, 855, 26))
    self.menubar.setObjectName("menubar")
    main.setMenuBar(self.menubar)
    self.statusbar = QtWidgets.QStatusBar(main)
    self.statusbar.setObjectName("statusbar")
    main.setStatusBar(self.statusbar)

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

def retranslateUi(self, main):
    _translate = QtCore.QCoreApplication.translate
    main.setWindowTitle(_translate("main", "MainWindow"))
    self.label.setText(_translate("main", "DATA"))
    self.lineEdit.setPlaceholderText(_translate("main", "day"))
    self.pushButton.setText(_translate("main", "SEARCH"))

子_搜索.py你知道吗

from PyQt5 import QtCore, QtWidgets
from PyQt5.QtWidgets import QMessageBox
class Ui_Dialog(object):
def setupUi(self, Dialog):
    Dialog.setObjectName("Dialog")
    Dialog.resize(478, 170)
    Dialog.setMaximumSize(QtCore.QSize(560, 170))
    self.verticalLayout_2 = QtWidgets.QVBoxLayout(Dialog)
    self.verticalLayout_2.setObjectName("verticalLayout_2")
    self.frame = QtWidgets.QFrame(Dialog)
    self.frame.setFrameShape(QtWidgets.QFrame.StyledPanel)
    self.frame.setFrameShadow(QtWidgets.QFrame.Raised)
    self.frame.setObjectName("frame")
    self.verticalLayout = QtWidgets.QVBoxLayout(self.frame)
    self.verticalLayout.setObjectName("verticalLayout")
    self.label = QtWidgets.QLabel(self.frame)
    self.label.setAlignment(QtCore.Qt.AlignCenter)
    self.label.setObjectName("label")
    self.verticalLayout.addWidget(self.label)
    self.lineEdit = QtWidgets.QLineEdit(self.frame)
    self.lineEdit.setObjectName("lineEdit")
    self.verticalLayout.addWidget(self.lineEdit)
    self.verticalLayout_2.addWidget(self.frame)
    self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
    self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
    self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
    self.buttonBox.setCenterButtons(True)
    self.buttonBox.setObjectName("buttonBox")
    self.verticalLayout_2.addWidget(self.buttonBox)

    self.retranslateUi(Dialog)
    self.buttonBox.accepted.connect(Dialog.accept)
    self.buttonBox.rejected.connect(Dialog.reject)
    QtCore.QMetaObject.connectSlotsByName(Dialog)


def get_text_from(self):
    if self.lineEdit.text() != "" and self.buttonBox.accepted():
        swc = self.lineEdit.text()
        return swc
    elif self.lineEdit.text() == "" and self.buttonBox.accepted():
        warning_message(title="Warning!", message="please provide swc clli,thanks!")
    else:
        pass

def retranslateUi(self, Dialog):
    _translate = QtCore.QCoreApplication.translate
    Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
    self.label.setText(_translate("Dialog", "TextLabel"))
    self.buttonBox.accepted.connect(self.get_text_from)


def warning_message(title="Warning!", message="Please provide input, 
thanks!"):
    QMessageBox.information(None, title, message)



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

我的问题是如何捕获lineEdit值并在我的主应用程序文件中使用。 我知道我还有很多东西要学，所以如果有人能指出正确的方向那就太棒了。我有一个不错的开始，但我不知道如何完成这个。。你知道吗

提前谢谢！你知道吗

Answer 1

你可以这样做：

class SearchTool(search.Ui_main, QtWidgets.QMainWindow):

    def __init__(self):
        super(SearchTool, self).__init__()
        self.setupUi(self)
        self.push()

    def master_data_search(self):
        if self.lineEdit.text() != "":
            day = self.lineEdit.text().strip()
            if day.upper() in "TUESDAY":
                result = self.open_dialog()
                if result is not None:
                    print(f'the search result was {result}')
                else:
                    print('the search was canceled')
            else:
                print('do something else')

    def push(self):
        self.pushButton.clicked.connect(self.master_data_search)

    def open_dialog(self):
        print('open dialog')
        Dialog = QtWidgets.QDialog(self)
        ui = sub_search.Ui_Dialog()
        ui.setupUi(Dialog)
        #Dialog.show()
        resp = Dialog.exec_()

        if resp == QtWidgets.QDialog.Accepted:
            print("Accepted!")
            # retrieve text from line edit in dialog and return it
            return ui.lineEdit.text()
        else:
            print('rejected')
            return None