[pyqt5]QListWidget的增删改和右键菜单创建

        self.listWidget.addItem("11111")
        self.listWidget.addItem("22222")
        self.listWidget.addItem("33333")
        self.listWidget.addItem("44444")

self.listWidget.insertItem(1, 'aaaaa')

self.listWidget.clear()

item = self.listWidget.takeItem(self.listWidget.currentRow())
del item

        item = self.listWidget.takeItem(1)
        del item

self.listWidget.item(1).setText('cccc')

self.listWidget.setContextMenuPolicy(3)
self.listWidget.customContextMenuRequested[QPoint].connect(self.listWidgetContext)
    def listWidgetContext(self, point):
        popMenu = QMenu()
        add_action = QAction("添加", popMenu)
        add_action.triggered.connect(self.add)
        popMenu.addAction(add_action)
        popMenu.addAction("修改")
        popMenu.addAction("删除")
        popMenu.exec_(QCursor.pos())
    def add(self):
        pass

count = self.listWidget.count()
 print(count)

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.7
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QStringListModel, Qt, QPoint
from PyQt5.QtGui import QCursor
from PyQt5.QtWidgets import QMenu, QAction, QListView, QAbstractItemView


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.listWidget = QtWidgets.QListWidget(self.centralwidget)
        self.listWidget.setGeometry(QtCore.QRect(170, 50, 391, 401))
        self.listWidget.setObjectName("listWidget")

        self.listWidget.setSelectionMode(QAbstractItemView.ExtendedSelection)  # 设置选择模式：多选
        self.listWidget.setSelectionBehavior(QAbstractItemView.SelectRows)  # 选中行为：选中整行
        self.listWidget.setViewMode(QListView.ListMode)  # 列表形式展示数据


        # 添加一行
        self.listWidget.addItem("11111")
        self.listWidget.addItem("22222")
        self.listWidget.addItem("33333")
        self.listWidget.addItem("44444")

        # 指定行插入数据
        self.listWidget.insertItem(1, 'aaaaa')
        # #清空所有行
        # self.listWidget.clear()
        # # 删除当前项
        # item = self.listWidget.takeItem(self.listWidget.currentRow())
        # del item
        # 删除指定行，比如第2行
        item = self.listWidget.takeItem(1)
        del item

        #修改某一行
        self.listWidget.item(1).setText('cccc')

        #统计有多少行
        count = self.listWidget.count()
        print(count)

        # 项目被单击事件
        self.listWidget.itemClicked.connect(self.clicked)  # 项目被单击

        self.listWidget.clicked.connect(self.listWidget_clicked)  # 控件被单击

        # self.listWidget.doubleClicked.connect(self.listWidget_clicked)#控件被双击

        # 添加右键菜单
        self.listWidget.setContextMenuPolicy(3)
        self.listWidget.customContextMenuRequested[QPoint].connect(self.listWidgetContext)

        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 30))
        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 listWidget_clicked(self, index):
        print('控件被单击')
        print('选择项索引', index.row())
        print('选择项目文本为', self.listWidget.currentItem().text())

    def clicked(self, index):
        print('项目被单击')
        index = self.listWidget.currentIndex().row()
        print('选择项索引', index)
        print('选择项目文本为', self.listWidget.currentItem().text())

    def listWidgetContext(self, point):
        popMenu = QMenu()
        add_action = QAction("添加", popMenu)
        add_action.triggered.connect(self.add)
        popMenu.addAction(add_action)
        popMenu.addAction("修改")
        popMenu.addAction("删除")
        popMenu.exec_(QCursor.pos())

    def add(self):
        pass

    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_())