Pyside2 - 无法在插槽内获取发件人

Question

无法获取发出信号的发送方对象。 sender（）始终返回None。以下代码适用于pyqt5，

试图在qtablewidget中获取哪个组合框在插槽内发出信号。

提到了docs和net，看起来pyside有不同的方法来获取发送者而不是pyqt。尝试自己看到一个啧啧但总是得到无。

在pyside中将发送者放入插槽的最简单方法是什么？

from PySide2 import QtCore, QtGui, QtWidgets
from PySide2.QtSql import *
from PySide2.QtGui import *
from PySide2.QtWidgets import *
from PySide2.QtCore import QSize
from PySide2.QtGui import QImage, QPalette, QBrush
import sys
import time
import sqlite3
import requests
import os

wwd=1366
wwh=768

class Ui_MainWindow(object):    
    def loadData(self):        
        conn = sqlite3.connect('uniprotect.db',timeout=60);
        query='select u_key,u_user,u_password,remote,port,rusername,rpassword,ragent,u_status from user_info'
        result=conn.execute(query)
        self.tableWidget.setRowCount(0)

        for row_number, row_data in enumerate(result):
            self.tableWidget.insertRow(row_number)
            for column_number, data in enumerate(row_data):   
                self.tableWidget.setItem(row_number,column_number,QtWidgets.QTableWidgetItem(str(data)))
                if str(column_number)=='8':
                    comboBox = QtWidgets.QComboBox()

                    comboBox.addItems(['Enabled','Disabled'])
                    index = comboBox.findText(data, QtCore.Qt.MatchFixedString)
                    print('combo index ',index)
                    comboBox.setCurrentIndex(index)
                    comboBox.setCurrentIndex(index)
                    comboBox.setProperty('row', row_number)  
                    comboBox.currentIndexChanged.connect(self.Combo_indexchanged)                                        
                    self.tableWidget.setCellWidget(row_number,column_number,comboBox)
        conn.close();        
        self.tableFields = ["Key","UserName","Password","Remote", "Port","Rusername","Rpassword", "Agent","AccountStatus"]
        self.tableWidget.setColumnCount(len(self.tableFields))
        self.tableWidget.setHorizontalHeaderLabels(self.tableFields)

    def Combo_indexchanged(self):
        print(self.MainWindow.sender())
        combo = self.MainWindow.sender()
        row = combo.property('row')
        index = combo.currentIndex()
        print('combo row %d indexChanged to %d' % (row, index))

    def setupUi(self, MainWindow):
        self.MainWindow = MainWindow
        MainWindow.setObjectName("MainWindow")
        MainWindow.setWindowModality(QtCore.Qt.ApplicationModal)
        MainWindow.resize(1366,768)
        MainWindow.setFocusPolicy(QtCore.Qt.StrongFocus)        
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")

        self.tableWidget=QtWidgets.QTableWidget(self.centralwidget)
        self.tableWidget.setGeometry(QtCore.QRect(wwd*0.15, wwh*0.15, wwd*0.85,wwh*0.85))
        self.tableWidget.setSelectionBehavior(QAbstractItemView.SelectRows)

        self.tableWidget.setRowCount(50)
        self.tableWidget.setColumnCount(10)
        self.tableWidget.setObjectName("TableWIdget")

        MainWindow.setCentralWidget(self.centralwidget)
        self.loadData();
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)    
    MainWindow.show()
    sys.exit(app.exec_())

Answer 1

根据Qt的pyside2 documentation，sender()是PySide2.QtCore.QObject的一种方法。

您不能将其称为静态方法，而只能从QObject中调用它。

但是，所有小部件都是class Ui_MainWindow(object)的成员，并且该类不从QObject继承。

所以改变

class Ui_MainWindow(object):    

至

class Ui_MainWindow(QtCore.QObject):    

为了让你的班级内有sender()。

现在你可以在插槽self.sender()中调用Combo_indexchanged()：

def Combo_indexchanged(self):
    combo = self.sender()
    row = combo.property('row')
    index = combo.currentIndex()
    print('combo row %d indexChanged to %d' % (row, index))