PyQt5关闭应用程序bec。.value（）方法的错误类型

Question

每当我在PyQt5应用程序的第二个窗口中单击一个按钮，该按钮应该只在GUI中打印QDateEdit的值，它就会以一行结束：“Process finished with exit code-1073740791（0xC0000409）”。我发现问题与.value（）方法有关。下面是使用Ui_Form类复制错误的最低限度方法：

import sys
from PyQt5 import QtWidgets
from ui.fenster import Ui_Form


app = QtWidgets.QApplication(sys.argv)

class AppendWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.ui = Ui_Form()
        self.ui.setupUi(self)
        self.ui.submit.clicked.connect(self.show_value)


    def show_value(self):
        print(self.ui.date.value())






append = AppendWindow()

append.show()
sys.exit(app.exec_())

用户界面表格：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(413, 215)
        self.date = QtWidgets.QDateEdit(Form)
        self.date.setGeometry(QtCore.QRect(72, 26, 321, 20))
        self.date.setObjectName("date")
        self.label = QtWidgets.QLabel(Form)
        self.label.setGeometry(QtCore.QRect(9, 26, 57, 16))
        self.label.setObjectName("label")
        self.age = QtWidgets.QSpinBox(Form)
        self.age.setGeometry(QtCore.QRect(70, 120, 321, 20))
        self.age.setObjectName("age")
        self.label_2 = QtWidgets.QLabel(Form)
        self.label_2.setGeometry(QtCore.QRect(10, 120, 23, 16))
        self.label_2.setObjectName("label_2")
        self.label_3 = QtWidgets.QLabel(Form)
        self.label_3.setGeometry(QtCore.QRect(9, 69, 27, 16))
        self.label_3.setObjectName("label_3")
        self.name = QtWidgets.QPlainTextEdit(Form)
        self.name.setGeometry(QtCore.QRect(72, 69, 319, 21))
        self.name.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.name.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.name.setObjectName("name")
        self.submit = QtWidgets.QPushButton(Form)
        self.submit.setGeometry(QtCore.QRect(170, 170, 75, 23))
        self.submit.setObjectName("submit")

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.label.setText(_translate("Form", "Geburtsjahr"))
        self.label_2.setText(_translate("Form", "Alter"))
        self.label_3.setText(_translate("Form", "Name"))
        self.submit.setText(_translate("Form", "Absenden!"))

有人知道如何解决这个问题吗？ 我感谢你的帮助

Answer 1

为了启动主循环，需要在主代码中添加app.exec()

app = QtWidgets.QApplication(sys.argv)
app.exec()

主循环处理所有传入事件并将它们传递给GUI元素