How to transfer parameters between pyqt4 signal and slot

It is believed that many inexperienced people have no idea about how to transfer parameters between pyqt4 signal and slot. Therefore, this paper summarizes the causes and solutions of the problem. Through this article, I hope you can solve this problem.

Import sys

From time import time

From PyQt4.QtCore import *

Class A (QObject):

Def _ init__ (self):

QObject.__init__ (self)

# define a method for transmitting a signal. I is the parameter of the signal.

Def afunc (self, I):

Self.emit (SIGNAL ("doSomePrinting (int)")

i)

# here is the slot handling function of the corresponding signal 'doSomePrinting (int)', and I is the parameter from the signal

Def bfunc (self, I):

Print "Hello

World!, I

Sys.exit ()

If _ _ name__== "_ _ main__":

App=QCoreApplication (sys.argv)

A signal () # connects the signal to the slot

QObject.connect ("doSomePrinting (int)"), a.bfunc)

# call the signal emission function a.afunc (10)

Sys.exit (app.exec_ ())

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