如何从pyqt中的qcombobox获取itemdata?

时间:2019-04-03 22:22:59

标签: python python-3.x pyqt pyqt5

当我单击QtWidgets.QPushButton来显示来自QtWidgets.QComboBox的itemData时,我遇到了问题。我用以下代码填充ComboBox:

self.comboBox.addItem("Sandro",1)
self.comboBox.addItem("Daniel",2)
self.comboBox.addItem("Pedro",3)

它填充了QtWidgets.QComboBox,但是当我设置QtWidgets.QPushButton时出现了问题。我在setupUi中添加了它:

self.pushButton.clicked.connect(self.showId)

最后开发了函数showId:

id_us = self.comboBox.itemData(self.comboBox.currentIndex())
print('VAL ',id_us)

单击按钮时,窗口关闭,这是什么问题? 我共享我的accessForm.py的所有代码:

# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(598, 245)
        self.groupBox = QtWidgets.QGroupBox(Form)
        self.groupBox.setGeometry(QtCore.QRect(10, 20, 541, 201))
        self.groupBox.setObjectName("groupBox")
        self.pushButton = QtWidgets.QPushButton(self.groupBox)
        self.pushButton.setGeometry(QtCore.QRect(50, 150, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.label = QtWidgets.QLabel(self.groupBox)
        self.label.setGeometry(QtCore.QRect(40, 30, 47, 13))
        self.label.setObjectName("label")
        self.comboBox = QtWidgets.QComboBox(self.groupBox)
        self.comboBox.setGeometry(QtCore.QRect(110, 30, 111, 22))
        self.comboBox.setObjectName("comboBox")
        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)
        self.fillCombo()
        self.pushButton.clicked.connect(self.showId)
    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.groupBox.setTitle(_translate("Form", "Datos"))
        self.pushButton.setText(_translate("Form", "Inicio"))
        self.label.setText(_translate("Form", "TextLabel"))
    def showId(self):
        id_us = self.comboBox.itemData(self.comboBox.currentIndex()).toPyObject()
        print('VAL ',id_us)
    def fillCombo(self):
        self.comboBox.addItem("Sandro",1)
        self.comboBox.addItem("Daniel",2)
        self.comboBox.addItem("Pedro",3)
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

谢谢。

1 个答案:

答案 0 :(得分:3)

在我看来,您正在使用一个过时的教程,在PyQt4中,您必须使用toPyObject()方法将PyQt对象转换为python本机对象,但是在PyQt5中,则不再需要:

def showId(self):
    id_us = self.comboBox.itemData(self.comboBox.currentIndex()) # .toPyObject()
    print('VAL ',id_us)

由于IDE在处理PyQt错误消息方面存在问题,因此建议使用终端或CMD来获取错误消息。