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QTablewidget生成右键菜单，需要自定义一个QTablewidget类
import sys
from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem, QMenu, QAction, QDialog
from PyQt5.QtCore import Qt
from PyQt5 import QtCoreclass CustomTableWidget(QTableWidget): def __init__(self, parent=None):super(CustomTableWidget, self).__init__( parent)self.setRowCount(10)self.setColumnCount(2)# 初始化表格数据self.setHorizontalHeaderLabels(['姓名','班别']) #水平标题names = ['小天','小米','小云','小月','小芳','小贝','小美','小亮','小欢','小阳']classes = ['一班','一班','一班','二班','二班','二班','二班','三班','三班','三班']i = 0for item in names:self.setItem(i,0, QTableWidgetItem(item))#添加内容到表格中self.setItem(i,1, QTableWidgetItem(classes[i]))i += 1# 创建右键菜单self.popup_menu = QMenu(self)self.action1 = QAction("显示", self)#生成一个选项self.popup_menu.addAction(self.action1)#将选项添加到菜单中# 连接动作到槽函数（可选）self.action1.triggered.connect(self.on_action1_triggered)def mousePressEvent(self, event):#重写mousePressEventif event.button() == Qt.RightButton:# 获取点击的单元格位置self.row = self.rowAt(event.y())#行self.column = self.columnAt(event.x())#列super().mousePressEvent(event)#调用父类的mousePressEvent处理其他事件# 显示右键菜单self.popup_menu.exec_(event.globalPos())else:super().mousePressEvent(event)#调用父类的mousePressEvent处理其他事件def on_action1_triggered(self):# 菜单选项action1的动作print(f"行：{self.row} 列：{self.column}")if __name__ == '__main__':app = QApplication(sys.argv)dialog = QDialog()dialog.resize(400, 300)table = CustomTableWidget(dialog) # 创建一个表格table.setGeometry(QtCore.QRect(70, 50, 256, 192))dialog.show()sys.exit(app.exec_())按F5运行，在界面的表格中按右键时，显示菜单
选中显示是，控制台输出选中的行数和列数
QAction的信号
| 信号 | 内容 |
|---|---|
| triggered | 点击或回车键触发时 |
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