PyQt no button.clicked.connect function?

问题:

I've got PyQt4 with a python 3.4 and there is this strange bug occurring. Whenever I try to call btn.clicked.connect(), Pycharm will throw this error:

Cannot find reference "connect" in "function". 

So for example:

btn = QtGui.QPushButton("Quit", self) btn.clicked.connect(QtCore.QCoreApplication.instance().quit) 

will throw this error. How? Do I have missing files?

回答1:

According to Events and Signals in PyQt4 - PyQt4 Tutorial - ZetCode:

PyQt4.5 introduced a new style API for working with signals and slots.

QtCore.QObject.connect(button, QtCore.SIGNAL('clicked()'),self.onClicked) 

This is the old style API.

button.clicked.connect(self.onClicked) 

The new style adheres more to the Python standards.

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