将上次的实现的表格添加新增按钮，并能产生新的数据显示在表格中。
通过布局使新数据在表格居中布局。

#-*- codingg:utf8 -*-
from main_serve import *
from PyQt5 import QtCore
from PyQt5.QtWidgets import QMainWindow,QWidget,QApplication,QTableWidgetItem,QCheckBox,QHBoxLayout
import sys
class MyWindow(QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MyWindow, self).__init__(parent)
        self.setupUi(self)
        self.row_count = 0;
    def startHandle(self):
        self.tableWidget.setRowCount(1)
        # _translate = QtCore.QCoreApplication.translate
        # item = self.tableWidget.item(0, 0)
        # item.setText(_translate("MainWindow", "11"))
        self.tableWidget.setItem(0, 0, QTableWidgetItem('11'))
        print(111)
    def addAccount(self):
        widget = QWidget()
        self.tableWidget.setRowCount(self.row_count+1)
        # self.check = QtWidgets.QTableWidgetItem()
        # self.check.setCheckState(QtCore.Qt.Unchecked)
        # self.tableWidget.setItem(self.row_count, 0, self.check)

        check=QCheckBox()
        check.setCheckState(QtCore.Qt.Unchecked)
        check.setStyleSheet(''' text-align : center;align:center;  ''')
        #居中布局
        hLayout = QHBoxLayout()
        hLayout.addStretch()#水平伸缩
        hLayout.addWidget(check)
        hLayout.addStretch() #水平伸缩
        hLayout.setContentsMargins(5, 2, 5, 2)
        widget.setLayout(hLayout)
        self.tableWidget.setCellWidget(self.row_count, 0, widget)
        item = QtWidgets.QTableWidgetItem('11')
        item.setTextAlignment(QtCore.Qt.AlignCenter)
        self.tableWidget.setItem(self.row_count, 1, item)
        self.row_count =  self.row_count +1




if __name__=="__main__":
    app = QApplication(sys.argv)
    myWin = MyWindow()
    myWin.show()
    sys.exit(app.exec_())

示例