pyqt中QtGui.QTableWidgetItem()改为双击可编辑

可以使用QTableWidget的setCellWidget()函数来设置一个QLineEdit部件作为单元格的持久编辑器，然后使用双击信号将其激活。具体步骤如下：

1.创建一个QLineEdit部件，并将其设置为单元格的持久编辑器：

lineEdit = QLineEdit()
tableWidget.setCellWidget(row, column, lineEdit)

2.连接QTableWidget的cellDoubleClicked信号到一个槽函数：

tableWidget.cellDoubleClicked.connect(self.editCell)

3.在槽函数中获取单元格的坐标，并将其持久编辑器设置为可编辑状态：

def editCell(self, row, column):
    lineEdit = self.tableWidget.cellWidget(row, column)
    lineEdit.setReadOnly(False)
    lineEdit.setFocus()

完整代码如下：

from PyQt5.QtWidgets import QApplication, QTableWidget, QTableWidgetItem, QLineEdit
from PyQt5.QtCore import Qt

class MyTable(QTableWidget):
    def __init__(self, rows, columns):
        super().__init__(rows, columns)
        self.initUI()

    def initUI(self):
        self.setHorizontalHeaderLabels(['Column 1', 'Column 2', 'Column 3'])
        for i in range(self.rowCount()):
            for j in range(self.columnCount()):
                item = QTableWidgetItem('Item %d-%d' % (i, j))
                self.setItem(i, j, item)

        # 设置单元格持久编辑器
        for i in range(self.rowCount()):
            for j in range(self.columnCount()):
                lineEdit = QLineEdit()
                lineEdit.setReadOnly(True)
                self.setCellWidget(i, j, lineEdit)

        # 连接双击信号到槽函数
        self.cellDoubleClicked.connect(self.editCell)

    def editCell(self, row, column):
        lineEdit = self.cellWidget(row, column)
        lineEdit.setReadOnly(False)
        lineEdit.setFocus()

if __name__ == '__main__':
    app = QApplication([])
    table = MyTable(4, 3)
    table.show()
    app.exec_()