为什么每当我在QLineEdit中输入一些数据时都不会发生textChanged事件?
from PyQt4.Qt import Qt, QObject,QLineEdit
from PyQt4.QtCore import pyqtSlot,SIGNAL,SLOT
from PyQt4 import QtGui, QtCore
import sys
class DirLineEdit(QLineEdit, QtCore.QObject):
"""docstring for DirLineEdit"""
@pyqtSlot(QtCore.QString)
def textChanged(self, string):
QtGui.QMessageBox.information(self,"Hello!","Current String is:\n"+string)
def __init__(self):
super(DirLineEdit, self).__init__()
self.connect(self,SIGNAL("textChanged(QString&)"),
self,SLOT("textChanged(QString *)"))
app = QtGui.QApplication(sys.argv)
smObj = DirLineEdit()
smObj.show()
app.exec_()
对我来说,一切似乎都是对的,我错过了什么?
答案 0 :(得分:8)
替换以下行:
self.connect(self,SIGNAL("textChanged(QString&)"),
self,SLOT("textChanged(QString *)"))
使用:
self.connect(self,SIGNAL("textChanged(QString)"),
self,SLOT("textChanged(QString)"))
或者您可以使用self.textChanged.connect
(由于名称冲突,应重命名处理程序):
class DirLineEdit(QLineEdit, QtCore.QObject):
def on_text_changed(self, string):
QtGui.QMessageBox.information(self,"Hello!","Current String is:\n"+string)
def __init__(self):
super(DirLineEdit, self).__init__()
self.textChanged.connect(self.on_text_changed)