效果图：
添加的部分，就是对几个action绑定了槽函数，完成相应的功能。
listWidget操作的都是item，添加一个item，删除一个item，插入一个item等等。那么只需要知道item的几个操作方法。
- Item = QListWidgetItem()
- Item.setText("文本内容")
- Item.setCheckState(Qt.Checked) 勾选
- Item.setFlags(Qt.ItemIsSelectedable|Qt.ItemIsUserCheckable|Qt.ItemIsEnabled|Qt.ItemIsEditable)可以编辑
- listWidget.addItem(Item)添加
- listWidget.insertItem(行号，Item)插入
- listWidget.takeItem(行号)删除
- listWidget.clear()清空
ui_listWidget.py
# -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'ui_listwidget.ui' # # Created by: PyQt5 UI code generator 5.13.0 # # WARNING! All changes made in this file will be lost! from PyQt5 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(800, 483) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.splitter = QtWidgets.QSplitter(self.centralwidget) self.splitter.setGeometry(QtCore.QRect(10, 10, 781, 381)) self.splitter.setOrientation(QtCore.Qt.Horizontal) self.splitter.setObjectName("splitter") self.toolBox = QtWidgets.QToolBox(self.splitter) self.toolBox.setMaximumSize(QtCore.QSize(16777215, 16777215)) self.toolBox.setObjectName("toolBox") self.page = QtWidgets.QWidget() self.page.setGeometry(QtCore.QRect(0, 0, 152, 291)) self.page.setObjectName("page") self.gridLayout = QtWidgets.QGridLayout(self.page) self.gridLayout.setObjectName("gridLayout") self.btnList_Ini = QtWidgets.QToolButton(self.page) self.btnList_Ini.setMinimumSize(QtCore.QSize(130, 30)) self.btnList_Ini.setObjectName("btnList_Ini") self.gridLayout.addWidget(self.btnList_Ini, 0, 0, 1, 1) self.btnList_Clear = QtWidgets.QToolButton(self.page) self.btnList_Clear.setMinimumSize(QtCore.QSize(130, 30)) self.btnList_Clear.setObjectName("btnList_Clear") self.gridLayout.addWidget(self.btnList_Clear, 1, 0, 1, 1) self.btnList_Insert = QtWidgets.QToolButton(self.page) self.btnList_Insert.setMinimumSize(QtCore.QSize(130, 30)) self.btnList_Insert.setObjectName("btnList_Insert") self.gridLayout.addWidget(self.btnList_Insert, 2, 0, 1, 1) self.btnList_Append = QtWidgets.QToolButton(self.page) self.btnList_Append.setMinimumSize(QtCore.QSize(130, 30)) self.btnList_Append.setObjectName("btnList_Append") self.gridLayout.addWidget(self.btnList_Append, 3, 0, 1, 1) self.btnList_Delete = QtWidgets.QToolButton(self.page) self.btnList_Delete.setMinimumSize(QtCore.QSize(130, 30)) self.btnList_Delete.setObjectName("btnList_Delete") self.gridLayout.addWidget(self.btnList_Delete, 4, 0, 1, 1) icon = QtGui.QIcon() icon.addPixmap(QtGui.QPixmap("Image/icons/list.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.toolBox.addItem(self.page, icon, "") self.page_2 = QtWidgets.QWidget() self.page_2.setGeometry(QtCore.QRect(0, 0, 152, 291)) self.page_2.setObjectName("page_2") icon1 = QtGui.QIcon() icon1.addPixmap(QtGui.QPixmap("Image/icons/tree.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.toolBox.addItem(self.page_2, icon1, "") self.page_3 = QtWidgets.QWidget() self.page_3.setObjectName("page_3") icon2 = QtGui.QIcon() icon2.addPixmap(QtGui.QPixmap("Image/icons/tabel.ico"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.toolBox.addItem(self.page_3, icon2, "") self.tabWidget = QtWidgets.QTabWidget(self.splitter) self.tabWidget.setObjectName("tabWidget") self.tab = QtWidgets.QWidget() self.tab.setObjectName("tab") self.gridLayout_2 = QtWidgets.QGridLayout(self.tab) self.gridLayout_2.setObjectName("gridLayout_2") self.btnSel_None = QtWidgets.QToolButton(self.tab) self.btnSel_None.setObjectName("btnSel_None") self.gridLayout_2.addWidget(self.btnSel_None, 1, 3, 1, 1) self.checkBox = QtWidgets.QCheckBox(self.tab) font = QtGui.QFont() font.setPointSize(10) self.checkBox.setFont(font) self.checkBox.setObjectName("checkBox") self.gridLayout_2.addWidget(self.checkBox, 0, 6, 1, 1) self.listWidget = QtWidgets.QListWidget(self.tab) self.listWidget.setObjectName("listWidget") item = QtWidgets.QListWidgetItem() item.setFlags(QtCore.Qt.ItemIsSelectable|QtCore.Qt.ItemIsEditable|QtCore.Qt.ItemIsDragEnabled|QtCore.Qt.ItemIsUserCheckable|QtCore.Qt.ItemIsEnabled) self.listWidget.addItem(item) item = QtWidgets.QListWidgetItem() item.setFlags(QtCore.Qt.ItemIsSelectable|QtCore.Qt.ItemIsEditable|QtCore.Qt.ItemIsDragEnabled|QtCore.Qt.ItemIsUserCheckable|QtCore.Qt.ItemIsEnabled) self.listWidget.addItem(item) self.gridLayout_2.addWidget(self.listWidget, 2, 0, 1, 7) self.label = QtWidgets.QLabel(self.tab) font = QtGui.QFont() font.setPointSize(10) self.label.setFont(font) self.label.setObjectName("label") self.gridLayout_2.addWidget(self.label, 0, 0, 1, 1) self.lineEdit = QtWidgets.QLineEdit(self.tab) self.lineEdit.setObjectName("lineEdit") self.gridLayout_2.addWidget(self.lineEdit, 0, 1, 1, 5) self.btnSel_ALL = QtWidgets.QToolButton(self.tab) self.btnSel_ALL.setObjectName("btnSel_ALL") self.gridLayout_2.addWidget(self.btnSel_ALL, 1, 2, 1, 1) self.btnSel_Invs = QtWidgets.QToolButton(self.tab) self.btnSel_Invs.setObjectName("btnSel_Invs") self.gridLayout_2.addWidget(self.btnSel_Invs, 1, 4, 1, 1) self.btnSelectItem = QtWidgets.QToolButton(self.tab) self.btnSelectItem.setObjectName("btnSelectItem") self.gridLayout_2.addWidget(self.btnSelectItem, 1, 0, 1, 2) self.tabWidget.addTab(self.tab, "") self.tab_2 = QtWidgets.QWidget() self.tab_2.setObjectName("tab_2") self.tabWidget.addTab(self.tab_2, "") self.tab_3 = QtWidgets.QWidget() self.tab_3.setObjectName("tab_3") self.tabWidget.addTab(self.tab_3, "") MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21)) self.menubar.setObjectName("menubar") MainWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName("statusbar") MainWindow.setStatusBar(self.statusbar) self.toolBar = QtWidgets.QToolBar(MainWindow) self.toolBar.setToolButtonStyle(QtCore.Qt.ToolButtonTextUnderIcon) self.toolBar.setObjectName("toolBar") MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.toolBar) self.actList_Ini = QtWidgets.QAction(MainWindow) icon3 = QtGui.QIcon() icon3.addPixmap(QtGui.QPixmap("Image/icons/initial.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actList_Ini.setIcon(icon3) self.actList_Ini.setObjectName("actList_Ini") self.actList_Clear = QtWidgets.QAction(MainWindow) icon4 = QtGui.QIcon() icon4.addPixmap(QtGui.QPixmap("Image/icons/clear.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actList_Clear.setIcon(icon4) self.actList_Clear.setObjectName("actList_Clear") self.actList_Insert = QtWidgets.QAction(MainWindow) icon5 = QtGui.QIcon() icon5.addPixmap(QtGui.QPixmap("Image/icons/insert.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actList_Insert.setIcon(icon5) self.actList_Insert.setObjectName("actList_Insert") self.actList_Append = QtWidgets.QAction(MainWindow) icon6 = QtGui.QIcon() icon6.addPixmap(QtGui.QPixmap("Image/icons/append.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actList_Append.setIcon(icon6) self.actList_Append.setObjectName("actList_Append") self.actList_Delete = QtWidgets.QAction(MainWindow) icon7 = QtGui.QIcon() icon7.addPixmap(QtGui.QPixmap("Image/icons/delete.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actList_Delete.setIcon(icon7) self.actList_Delete.setObjectName("actList_Delete") self.actSel_ALL = QtWidgets.QAction(MainWindow) self.actSel_ALL.setObjectName("actSel_ALL") self.actSel_None = QtWidgets.QAction(MainWindow) self.actSel_None.setObjectName("actSel_None") self.actSel_Invs = QtWidgets.QAction(MainWindow) self.actSel_Invs.setObjectName("actSel_Invs") self.actQuit = QtWidgets.QAction(MainWindow) icon8 = QtGui.QIcon() icon8.addPixmap(QtGui.QPixmap("Image/icons/quit.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actQuit.setIcon(icon8) self.actQuit.setObjectName("actQuit") self.actSelPopMenu = QtWidgets.QAction(MainWindow) icon9 = QtGui.QIcon() icon9.addPixmap(QtGui.QPixmap("Image/icons/popmenu.jpg"), QtGui.QIcon.Normal, QtGui.QIcon.Off) self.actSelPopMenu.setIcon(icon9) self.actSelPopMenu.setObjectName("actSelPopMenu") self.toolBar.addAction(self.actList_Ini) self.toolBar.addAction(self.actList_Clear) self.toolBar.addAction(self.actList_Insert) self.toolBar.addAction(self.actList_Append) self.toolBar.addAction(self.actList_Delete) self.retranslateUi(MainWindow) self.toolBox.setCurrentIndex(0) self.tabWidget.setCurrentIndex(0) self.actSelPopMenu.triggered.connect(self.actSel_Invs.trigger) self.actQuit.triggered.connect(MainWindow.close) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) self.btnList_Ini.setText(_translate("MainWindow", "btnList_Ini")) self.btnList_Clear.setText(_translate("MainWindow", "btnList_Clear")) self.btnList_Insert.setText(_translate("MainWindow", "btnList_Insert")) self.btnList_Append.setText(_translate("MainWindow", "btnList_Append")) self.btnList_Delete.setText(_translate("MainWindow", "btnList_Delete")) self.toolBox.setItemText(self.toolBox.indexOf(self.page), _translate("MainWindow", "QListWidget操作")) self.toolBox.setItemText(self.toolBox.indexOf(self.page_2), _translate("MainWindow", "QTreeWidget")) self.toolBox.setItemText(self.toolBox.indexOf(self.page_3), _translate("MainWindow", "QTabelWidget")) self.btnSel_None.setText(_translate("MainWindow", "btnSel_None")) self.checkBox.setText(_translate("MainWindow", "可编辑")) __sortingEnabled = self.listWidget.isSortingEnabled() self.listWidget.setSortingEnabled(False) item = self.listWidget.item(0) item.setText(_translate("MainWindow", "New Item")) item = self.listWidget.item(1) item.setText(_translate("MainWindow", "New Item1")) self.listWidget.setSortingEnabled(__sortingEnabled) self.label.setText(_translate("MainWindow", "当前项变化")) self.btnSel_ALL.setText(_translate("MainWindow", "btnSel_ALL")) self.btnSel_Invs.setText(_translate("MainWindow", "btnSel_Invs")) self.btnSelectItem.setText(_translate("MainWindow", "btnSelectItem")) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "QListWidget")) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "QTreeWidget")) self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_3), _translate("MainWindow", "QTableWidget")) self.toolBar.setWindowTitle(_translate("MainWindow", "toolBar")) self.actList_Ini.setText(_translate("MainWindow", "初始化列表")) self.actList_Ini.setToolTip(_translate("MainWindow", "初始化列表")) self.actList_Ini.setShortcut(_translate("MainWindow", "Ctrl+I")) self.actList_Clear.setText(_translate("MainWindow", "清除列表")) self.actList_Clear.setToolTip(_translate("MainWindow", "清除列表")) self.actList_Insert.setText(_translate("MainWindow", "插入项")) self.actList_Insert.setToolTip(_translate("MainWindow", "插入项")) self.actList_Insert.setShortcut(_translate("MainWindow", "Ctrl+S")) self.actList_Append.setText(_translate("MainWindow", "添加项")) self.actList_Append.setToolTip(_translate("MainWindow", "添加项")) self.actList_Append.setShortcut(_translate("MainWindow", "Ctrl+A")) self.actList_Delete.setText(_translate("MainWindow", "删除当前项")) self.actList_Delete.setToolTip(_translate("MainWindow", "删除当前项")) self.actList_Delete.setShortcut(_translate("MainWindow", "Del")) self.actSel_ALL.setText(_translate("MainWindow", "全选")) self.actSel_ALL.setToolTip(_translate("MainWindow", "全选")) self.actSel_None.setText(_translate("MainWindow", "全不选")) self.actSel_None.setToolTip(_translate("MainWindow", "全不选")) self.actSel_Invs.setText(_translate("MainWindow", "反选")) self.actSel_Invs.setToolTip(_translate("MainWindow", "反选")) self.actQuit.setText(_translate("MainWindow", "退出")) self.actQuit.setToolTip(_translate("MainWindow", "退出程序")) self.actSelPopMenu.setText(_translate("MainWindow", "项选择")) self.actSelPopMenu.setToolTip(_translate("MainWindow", "项选择"))
myMainWindow_listWidget.py
#!/usr/bin/env python # _*_ coding: UTF-8 _*_ """================================================= @Project -> File : Operate-system -> myMainWindow_listwidget.py @IDE : PyCharm @Author : zihan @Date : 2020/4/14 9:24 @Desc : =================================================""" import sys from PyQt5.QtWidgets import QApplication, QMainWindow, QListWidgetItem, QMenu, QToolButton from PyQt5.QtGui import QIcon, QCursor from PyQt5.QtCore import pyqtSlot, Qt from ui_listwidget import Ui_MainWindow class QmyMainWindow(QMainWindow): def __init__(self, parent=None): super().__init__(parent) self.ui = Ui_MainWindow() self.ui.setupUi(self) self.setCentralWidget(self.ui.splitter) # 使splitter充满整个工作区 self.__set_actions_for_button() # ToolButton关联Action self.__create_selection_pop_menu() self.__FlagEditable = Qt.ItemIsSelectable | Qt.ItemIsUserCheckable | Qt.ItemIsEnabled | Qt.ItemIsEditable self.__FlagNotEditable = Qt.ItemIsSelectable | Qt.ItemIsUserCheckable | Qt.ItemIsEnabled self.ui.listWidget.setContextMenuPolicy(Qt.CustomContextMenu) # 初始化列表 self.ui.actList_Ini.triggered.connect(self.do_act_list_ini_triggered) # 插入一项 self.ui.actList_Insert.triggered.connect(self.do_act_list_insert_triggered) # 添加一项 self.ui.actList_Append.triggered.connect(self.do_act_list_append_triggered) # 删除当前项 self.ui.actList_Delete.triggered.connect(self.do_act_list_delete_triggered) # 清空列表 self.ui.actList_Clear.triggered.connect(self.do_act_list_clear_triggered) # 全选 self.ui.actSel_ALL.triggered.connect(self.do_act_sel_all_triggered) # 全不选 self.ui.actSel_None.triggered.connect(self.do_act_sel_none_triggered) # 反选 self.ui.actSel_Invs.triggered.connect(self.do_act_sel_invs_triggered) # 当选择项发生变化时 self.ui.listWidget.currentItemChanged.connect(self.do_list_widget_current_item_changed) # 右键快捷菜单 self.ui.listWidget.customContextMenuRequested.connect(self.do_list_widget_custom_context_menu_requested) # ToolButton关联Action def __set_actions_for_button(self): self.ui.btnList_Ini.setDefaultAction(self.ui.actList_Ini) self.ui.btnList_Clear.setDefaultAction(self.ui.actList_Clear) self.ui.btnList_Insert.setDefaultAction(self.ui.actList_Insert) self.ui.btnList_Append.setDefaultAction(self.ui.actList_Append) self.ui.btnList_Delete.setDefaultAction(self.ui.actList_Delete) self.ui.btnSel_ALL.setDefaultAction(self.ui.actSel_ALL) self.ui.btnSel_None.setDefaultAction(self.ui.actSel_None) self.ui.btnSel_Invs.setDefaultAction(self.ui.actSel_Invs) self.ui.btnList_Ini.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) self.ui.btnList_Clear.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) self.ui.btnList_Insert.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) self.ui.btnList_Append.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) self.ui.btnList_Delete.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) # 创建ToolButton按钮的下拉菜单 def __create_selection_pop_menu(self): menuSelection = QMenu(self) # 下拉菜单 menuSelection.addAction(self.ui.actSel_ALL) menuSelection.addAction(self.ui.actSel_None) menuSelection.addAction(self.ui.actSel_Invs) # listWidget上方的btnSelectItem按钮 self.ui.btnSelectItem.setPopupMode(QToolButton.MenuButtonPopup) self.ui.btnSelectItem.setToolButtonStyle(Qt.ToolButtonTextBesideIcon) self.ui.btnSelectItem.setDefaultAction(self.ui.actSelPopMenu) self.ui.btnSelectItem.setMenu(menuSelection) # 设置下拉菜单 # 工具栏上的下拉式菜单按钮 toolBtn = QToolButton(self) toolBtn.setPopupMode(QToolButton.InstantPopup) toolBtn.setDefaultAction(self.ui.actSelPopMenu) toolBtn.setToolButtonStyle(Qt.ToolButtonTextUnderIcon) toolBtn.setMenu(menuSelection) # 设置下拉菜单 self.ui.toolBar.addWidget(toolBtn) # 工具栏添加分隔条和"退出"按钮 self.ui.toolBar.addSeparator() self.ui.toolBar.addAction(self.ui.actQuit) # 初始化列表 def do_act_list_ini_triggered(self): editable = self.ui.checkBox.isChecked() if editable: Flag = self.__FlagEditable # 可编辑 else: Flag = self.__FlagNotEditable # 不可编辑 self.ui.listWidget.clear() # 清除列表 for i in range(10): itemStr = "Item %d" % i aItem = QListWidgetItem() aItem.setText(itemStr) aItem.setCheckState(Qt.Checked) aItem.setFlags(Flag) # 项的Flag self.ui.listWidget.addItem(aItem) # 插入一项 def do_act_list_insert_triggered(self): editable = self.ui.checkBox.isChecked() if editable: Flag = self.__FlagEditable else: Flag = self.__FlagNotEditable aItem = QListWidgetItem() aItem.setText("Insert Item") aItem.setCheckState(Qt.Checked) aItem.setFlags(Flag) curRow = self.ui.listWidget.currentRow() # 当前行 self.ui.listWidget.insertItem(curRow, aItem) # 添加一项 def do_act_list_append_triggered(self): editable = self.ui.checkBox.isChecked() if editable: Flag = self.__FlagEditable else: Flag = self.__FlagNotEditable aItem = QListWidgetItem() aItem.setText("Append Item") aItem.setCheckState(Qt.Checked) aItem.setFlags(Flag) self.ui.listWidget.addItem(aItem) # 删除当前项 def do_act_list_delete_triggered(self): row = self.ui.listWidget.currentRow() self.ui.listWidget.takeItem(row) # 移出当前项，Python自动删除 # 清空列表 def do_act_list_clear_triggered(self): self.ui.listWidget.clear() # 全选 def do_act_sel_all_triggered(self): for i in range(self.ui.listWidget.count()): aItem = self.ui.listWidget.item(i) aItem.setCheckState(Qt.Checked) # 全不选 def do_act_sel_none_triggered(self): for i in range(self.ui.listWidget.count()): aItem = self.ui.listWidget.item(i) aItem.setCheckState(Qt.Unchecked) # 反选 def do_act_sel_invs_triggered(self): for i in range(self.ui.listWidget.count()): aItem = self.ui.listWidget.item(i) if aItem.checkState() != Qt.Checked: aItem.setCheckState(Qt.Checked) else: aItem.setCheckState(Qt.Unchecked) # 当选择项发生变化时 def do_list_widget_current_item_changed(self, current, previous): strInfo = "" if current is not None: if previous is None: strInfo = "当前：" + current.text() else: strInfo = "前一项：" + previous.text() + "；当前项：" + current.text() self.ui.lineEdit.setText(strInfo) # 右键快捷菜单 def do_list_widget_custom_context_menu_requested(self, pos): print("aaa") menuList = QMenu(self) # 创建菜单 menuList.addAction(self.ui.actList_Ini) menuList.addAction(self.ui.actList_Clear) menuList.addAction(self.ui.actList_Insert) menuList.addAction(self.ui.actList_Append) menuList.addAction(self.ui.actList_Delete) menuList.addSeparator() menuList.addAction(self.ui.actSel_ALL) menuList.addAction(self.ui.actSel_None) menuList.addAction(self.ui.actSel_Invs) menuList.exec(QCursor.pos()) # 显示菜单 if __name__ == "__main__": app = QApplication(sys.argv) # 创建app，用QApplication类 form = QmyMainWindow() form.show() sys.exit(app.exec_())
值得注意的是，如果遇到了添加右键快捷菜单时，在组件上单击右键没有触发信号的话，考虑没有添加右键菜单策略，这时候在__init__()函数中添加一句self.ui.listWidget.setContextMenuPolicy(Qt.CustomContextMenu)。
问题参考链接：https://blog.csdn.net/Wangguang_/article/details/91550394
ok.