我是PyQt的新手，最近我想用pyqt为运动员数据做一个数据管理系统。我创建50 * 3空白Item。但是当我删除数据然后插入数据时，数据没有完全显示在界面上。当我添加数据时，有一个错误
a=self.tableWidget.horizontalHeaderItem(col).text()
AttributeError: 'NoneType' object has no attribute 'text'。
我使用Qt设计器编写UI程序
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName(_fromUtf8("MainWindow"))
MainWindow.resize(841, 690)
self.centralwidget = QtGui.QWidget(MainWindow)
self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
self.tabWidget = QtGui.QTabWidget(self.centralwidget)
self.tabWidget.setGeometry(QtCore.QRect(90, 60, 661, 401))
self.tabWidget.setObjectName(_fromUtf8("tabWidget"))
self.tab = QtGui.QWidget()
self.tab.setObjectName(_fromUtf8("tab"))
self.lineEdit = QtGui.QLineEdit(self.tab)
self.lineEdit.setGeometry(QtCore.QRect(80, 240, 113, 20))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.lineEdit_2 = QtGui.QLineEdit(self.tab)
self.lineEdit_2.setGeometry(QtCore.QRect(80, 280, 113, 20))
self.lineEdit_2.setObjectName(_fromUtf8("lineEdit_2"))
self.lineEdit_3 = QtGui.QLineEdit(self.tab)
self.lineEdit_3.setGeometry(QtCore.QRect(80, 320, 113, 20))
self.lineEdit_3.setObjectName(_fromUtf8("lineEdit_3"))
self.label = QtGui.QLabel(self.tab)
self.label.setGeometry(QtCore.QRect(10, 240, 54, 16))
self.label.setObjectName(_fromUtf8("label"))
self.label_2 = QtGui.QLabel(self.tab)
self.label_2.setGeometry(QtCore.QRect(10, 280, 51, 20))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.label_3 = QtGui.QLabel(self.tab)
self.label_3.setGeometry(QtCore.QRect(10, 320, 54, 16))
self.label_3.setObjectName(_fromUtf8("label_3"))
self.pushButton = QtGui.QPushButton(self.tab)
self.pushButton.setGeometry(QtCore.QRect(550, 240, 75, 23))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.pushButton_2 = QtGui.QPushButton(self.tab)
self.pushButton_2.setGeometry(QtCore.QRect(550, 280, 75, 23))
self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
self.pushButton_3 = QtGui.QPushButton(self.tab)
self.pushButton_3.setGeometry(QtCore.QRect(550, 320, 75, 23))
self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
self.tableWidget = QtGui.QTableWidget(self.tab)
self.tableWidget.setGeometry(QtCore.QRect(20, 10, 611, 192))
self.tableWidget.setObjectName(_fromUtf8("tableWidget"))
self.tableWidget.setColumnCount(3)
self.tableWidget.setRowCount(50)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setVerticalHeaderItem(2, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(0, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(1, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(2, item)
item = QtGui.QTableWidgetItem()
self.tableWidget.setItem(0, 0, item)
self.tabWidget.addTab(self.tab, _fromUtf8(""))
self.tab_2 = QtGui.QWidget()
self.tab_2.setObjectName(_fromUtf8("tab_2"))
self.tabWidget.addTab(self.tab_2, _fromUtf8(""))
MainWindow.setCentralWidget(self.centralwidget)
self.QYolk = QtGui.QMenuBar(MainWindow)
self.QYolk.setGeometry(QtCore.QRect(0, 0, 841, 23))
self.QYolk.setObjectName(_fromUtf8("QYolk"))
MainWindow.setMenuBar(self.QYolk)
self.label.setBuddy(self.lineEdit)
self.label_2.setBuddy(self.lineEdit_2)
self.label_3.setBuddy(self.lineEdit_3)
self.retranslateUi(MainWindow)
self.tabWidget.setCurrentIndex(0)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None))
self.label.setText(_translate("MainWindow", " name0", None))
self.label_2.setText(_translate("MainWindow", "name1", None))
self.label_3.setText(_translate("MainWindow", "name2", None))
self.pushButton.setText(_translate("MainWindow", "add", None))
self.pushButton_2.setText(_translate("MainWindow", "save", None))
self.pushButton_3.setText(_translate("MainWindow", "delete", None))
item = self.tableWidget.verticalHeaderItem(0)
item.setText(_translate("MainWindow", "1", None))
item = self.tableWidget.verticalHeaderItem(1)
item.setText(_translate("MainWindow", "2", None))
item = self.tableWidget.verticalHeaderItem(2)
item.setText(_translate("MainWindow", "3", None))
item = self.tableWidget.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "name0", None))
item = self.tableWidget.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "name1", None))
item = self.tableWidget.horizontalHeaderItem(2)
item.setText(_translate("MainWindow", "name2", None))
__sortingEnabled = self.tableWidget.isSortingEnabled()
self.tableWidget.setSortingEnabled(False)
self.tableWidget.setSortingEnabled(__sortingEnabled)
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "player1", None))
self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "player2", None))
这是我的后端程序。我使用cellchange来获取更改的数据。这是一个好主意吗？
from PyQt4 import QtCore, QtGui,QtSql
import sys
class StartQt4(QtGui.QMainWindow,Ui_MainWindow):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.setupUi(self)
self.db = QtSql.QSqlDatabase.addDatabase("QMYSQL")
self.db.setHostName("localhost")
self.db.setDatabaseName("test")
self.db.setUserName("root")
self.db.setPassword("")
self.q=QtSql.QSqlQuery()
if (self.db.open()):
self.showdata()
else:
print "failed"
QtCore.QObject.connect(self.tableWidget, QtCore.SIGNAL("cellChanged(int, int)"), self.changedata)
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.adddata)
QtCore.QObject.connect(self.pushButton_3, QtCore.SIGNAL("clicked()"), self.deldata)
QtCore.QObject.connect(self.pushButton_2, QtCore.SIGNAL("clicked()"), self.savedata)
def adddata(self):
name0 = str(self.lineEdit.text())
name1 = str(self.lineEdit_2.text())
name2 = str(self.lineEdit_3.text())
self.q.exec_("insert into player values ('%s','%s','%s')" %(name0,name1,name2))
#lastrow=self.tableWidget.rowCount()
#self.tableWidget.insertRow(lastrow)
self.showdata()
def changedata(self,row,col):
co=self.tableWidget.columnCount()
row =self.tableWidget.currentRow()
a= self.tableWidget.selectedItems()
col=self.tableWidget.currentColumn()
a=self.tableWidget.horizontalHeaderItem(col).text()
if (col < (co-1)):
b=self.tableWidget.horizontalHeaderItem(col+1).text()
t=self.tableWidget.item(row, col+1).text()
elif (col == (co-1)):
b=self.tableWidget.horizontalHeaderItem(col-1).text()
t=self.tableWidget.item(row, col-1).text()
dt=self.tableWidget.currentItem().text()
self.q.exec_("update qiu set %s = '%s' where %s = %s " %(a,dt,b,t))
def savedata(self):
self.q.exec_("insert into player1 select distinct * from player")
def deldata(self):
#self.tableWidget.clear()
row=self.tableWidget.currentRow()
print row
a=self.tableWidget.horizontalHeaderItem(0).text()
x=self.tableWidget.item(row,0).text()
self.q.exec_("delete from qiu where %s=%s" %(a,x))
self.showdata()
def showdata(self):
self.q.exec_("select * from qiu")
col=self.tableWidget.columnCount()
for i in range(0,self.tableWidget.rowCount()):
self.q.next()
for j in range(col):
x=self.q.value(j).toString()
self.tableWidget.setItem(i, j, QtGui.QTableWidgetItem(x))
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
myapp = StartQt4()
myapp.show()
sys.exit(app.exec_())
非常感激