从其他对话框将字符串设置为组合框

Question

我在 Pyqt5 和 Qt Designer 中制作了两个 GUI。第一个 GUI 是在组合框中显示人名。第二个 GUI 将通过单击 + 按钮打开，然后用户可以在其他内容中写入我稍后需要的姓名、年龄和工作。

我的问题是，我如何从 2. GUI 中获取新名称并将其设置在 1. GUI 的组合框中。我在下面的代码中尝试过，但它不起作用。

整个代码：

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

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(363, 165)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(30, 30, 68, 19))
        self.label.setObjectName("label")
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox.setGeometry(QtCore.QRect(120, 30, 131, 25))
        self.comboBox.setObjectName("comboBox")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(280, 30, 41, 34))
        self.pushButton.setObjectName("pushButton")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 363, 31))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "person"))
        self.pushButton.setText(_translate("MainWindow", "+"))

    def InputDialog1(self):
        self.Dialog = QtWidgets.QDialog()
        self.ui=Ui_Dialog()
        self.ui.setupUi(self.Dialog)
        self.Dialog.setWindowTitle('Add Infos')
        self.Dialog.show()

class Person_data(object):
    def __init__(self,parent=None):
         self.Person_1 = {'-':[0,0]}

class MainWindow(QMainWindow, Ui_MainWindow,Person_data):

    def __init__(self, parent=None):
        QMainWindow.__init__(self, parent=parent)
        Person_data.__init__(self, parent=parent)
        self.setupUi(self)
        self.initMe()

    def initMe(self):
        self.pushButton.clicked.connect(self.InputDialog1)

        Person_list={}
        for i in self.Person_1.keys():
                Person_list[i] = ''
                Person_list_2 = list(Person_list)
        print(Person_list_2)
        self.comboBox.addItems(Person_list_2)



class Ui_Dialog(Person_data):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(344, 231)
        self.pushButton = QtWidgets.QPushButton(Dialog)
        self.pushButton.setGeometry(QtCore.QRect(170, 160, 112, 34))
        self.pushButton.setObjectName("pushButton")
        self.pushButton_2 = QtWidgets.QPushButton(Dialog)
        self.pushButton_2.setGeometry(QtCore.QRect(30, 160, 112, 34))
        self.pushButton_2.setObjectName("pushButton_2")
        self.gridLayoutWidget = QtWidgets.QWidget(Dialog)
        self.gridLayoutWidget.setGeometry(QtCore.QRect(30, 20, 271, 121))
        self.gridLayoutWidget.setObjectName("gridLayoutWidget")
        self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
        self.gridLayout.setContentsMargins(0, 0, 0, 0)
        self.gridLayout.setObjectName("gridLayout")
        self.lineEdit_2 = QtWidgets.QLineEdit(self.gridLayoutWidget)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 1)
        self.lineEdit = QtWidgets.QLineEdit(self.gridLayoutWidget)
        self.lineEdit.setObjectName("lineEdit")
        self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 1)
        self.lineEdit_3 = QtWidgets.QLineEdit(self.gridLayoutWidget)
        self.lineEdit_3.setObjectName("lineEdit_3")
        self.gridLayout.addWidget(self.lineEdit_3, 2, 1, 1, 1)
        self.label_2 = QtWidgets.QLabel(self.gridLayoutWidget)
        self.label_2.setObjectName("label_2")
        self.gridLayout.addWidget(self.label_2, 2, 0, 1, 1)
        self.label_3 = QtWidgets.QLabel(self.gridLayoutWidget)
        self.label_3.setObjectName("label_3")
        self.gridLayout.addWidget(self.label_3, 1, 0, 1, 1)
        self.label = QtWidgets.QLabel(self.gridLayoutWidget)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 0, 0, 1, 1)

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)
        self.pushButton.clicked.connect(self.okpress)
        self.pushButton_2.clicked.connect(Dialog.close)

    def okpress(self):
        aa1=float(self.lineEdit_2.text());aa2=float(self.lineEdit_3.text())
        self.Person_1[str(self.lineEdit.text())] = [aa1,aa2]
        i = True
        while i == True:
            bb = MainWindow()
            Person_list={}
            for i in self.Person_1.keys():
                Person_list[i] = ''
                Person_list_2 = list(Person_list)
            print(Person_list_2)
            bb.comboBox.addItems(Person_list_2)
            i=False  #just to exit while


    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.pushButton.setText(_translate("Dialog", "add"))
        self.pushButton_2.setText(_translate("Dialog", "Cancel"))
        self.label_2.setText(_translate("Dialog", "Age"))
        self.label_3.setText(_translate("Dialog", "Job"))
        self.label.setText(_translate("Dialog", "Name"))

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.setWindowTitle('Main Person Windows')
    w.show()
    sys.exit(app.exec_())

Answer 1

不建议您修改 Qt Designer 生成的代码，因为除了弄乱代码之外，您还可能出现意外行为。从我的角度来看，适当的事情是创建从适当的小部件继承并使用 QtDesigner 设计的类，因此我的回答包括重组代码以使其更具可读性。

在您的代码中分析我发现您将继承与共享数据的想法混淆了，当它从一个类继承时，它会在每个类中创建相似但不相等的元素，即使这些类的每个对象在它们之间创建相似的对象它们但它们不相同，不是相同的变量，因此它们指向不同的内存空间，在您的情况下，您认为由于 Ui_Dialog 和 MainWindow 从 Person_data 继承，那么两个类中的变量 Person_1 是相同的，实际上它不是。

您的代码存在的另一个问题是验证，必须尝试用户放置适当的值，并且必须在必要时与某些元素进行交互，例如，如果文本为空或不是数字，则转换为浮点数可能会导致问题, 并且添加按钮只有在所有字段都正确填写后才能启用，因为这个 Qt 提供了 QIntValidator 等类。

QDialog 是一个专门用于表单的类，我们应该尽可能地尝试使用exec_()，因为它会在表单被接受与否时返回，但是为此您必须在按钮合适时使用接受和拒绝方法.

代码：

class PersonDialog(QtWidgets.QDialog, Ui_Dialog):
    def __init__(self, *args, **kwargs):
        QtWidgets.QDialog.__init__(self, *args, **kwargs)
        self.setupUi(self)
        self.pushButton.clicked.connect(self.accept)
        self.pushButton_2.clicked.connect(self.reject)
        self.lineEdit_3.setValidator(QtGui.QIntValidator(0, 100))
        self.lineEdit.textChanged.connect(self.enableButtonAccept)
        self.lineEdit_2.textChanged.connect(self.enableButtonAccept)
        self.lineEdit_3.textChanged.connect(self.enableButtonAccept)
        self.enableButtonAccept()

    def enableButtonAccept(self):
        if self.lineEdit.text() != "" and self.lineEdit_2.text() != "" and self.lineEdit_3.text() != "":
            self.pushButton.setEnabled(True)
        else:
            self.pushButton.setEnabled(False)

    def getPerson(self):
        values = self.lineEdit.text(), self.lineEdit_2.text(), int(self.lineEdit_3.text())
        self.lineEdit.clear()
        self.lineEdit_2.clear()
        self.lineEdit_3.clear()
        return values

class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self, *args, **kwargs):
        QtWidgets.QMainWindow.__init__(self, *args, **kwargs)
        self.setupUi(self)
        self.Person_1 = {}
        self.initMe()

    def initMe(self):
        self.personDialog = PersonDialog(self)
        self.pushButton.clicked.connect(self.InputDialog1)

    def InputDialog1(self):
        if self.personDialog.exec_() == PersonDialog.Accepted:
            name, job, edad = self.personDialog.getPerson()
            self.Person_1[name] = [job, edad]
            self.comboBox.addItem(name)