from PyQt5.QtCore import QObject,pyqtSignal

 from PyQt5.QtWidgets import *

 import sys

 class Winfrom(QWidget):

     #定义各种信号

     signal1 = pyqtSignal()  #无参数的信号

     signal2 = pyqtSignal(int)   #带一个参数（整型）的信号

     signal3 = pyqtSignal(str)   #带一个参数（字符串）的信号

     signal4 = pyqtSignal(list)  #带一个参数（列表）的信号

     signal5 = pyqtSignal(dict)  #带一个参数（字典）的信号

     signal6 = pyqtSignal(int,str)   #带两个参数（整数，字符串）的信号

     signal7 = pyqtSignal([int,str],[str])   #带两个参数（[整数，字符串]或者[字符串]）的重载版本的信号

     def __init__(self,parent = None):

         super().__init__(parent)

         self.setWindowTitle('自定义信号和槽函数')

         self.resize(400,300)

         #将信号和槽连接

         self.signal1.connect(self.signal1Call)

         self.signal2.connect(self.signal2Call)

         self.signal3.connect(self.signal3Call)

         self.signal4.connect(self.signal4Call)

         self.signal5.connect(self.signal5Call)

         self.signal6.connect(self.signal6Call)

         self.signal7[int,str].connect(self.signal7Call)

         self.signal7[str].connect(self.signal7Calloverload)

         #发射信号

         self.signal1.emit()

         self.signal2.emit(1234)

         self.signal3.emit('熊')

         self.signal4.emit([1,'xiong',bool])

         self.signal5.emit({'xiong':'jt',"":1})

         self.signal6.emit(111,'信号和槽')

         self.signal7[int,str].emit(1314,'sb')

         self.signal7[str].emit('wtfk')

     #定义槽函数

     def signal1Call(self):

         print('signal1 emit')

     def signal2Call(self,int1):

         print('signal2 emit,value:',int1)

     def signal3Call(self,str1):

         print('signal3 emit,value:',str1)

     def signal4Call(self,list1):

         print('signal4 emit,value:',list1)

     def signal5Call(self,dict1):

         print('signal5 emit,value:',dict1)

     def signal6Call(self,int1,str1):

         print('signal6 emit,value:',int1,str1)

     def signal7Call(self,int1,str1):

         print('signal7 emit,value:',int1,str1)

     def signal7Calloverload(self,str1):

         print('signal7overload emit,value:',str1)

 if __name__ == '__main__':

     app = QApplication(sys.argv)

     win = Winfrom()

     win.show()

     sys.exit(app.exec_())

 from PyQt5 import QtCore

 from PyQt5.QtWidgets import QApplication ,QWidget ,QHBoxLayout , QPushButton

 import sys    

 class CustWidget( QWidget ):

     def __init__(self, parent=None):

         super(CustWidget, self).__init__(parent)

         self.okButton = QPushButton("OK", self)

         #使用setObjectName设置对象名称

         self.okButton.setObjectName("okButton")

         layout =  QHBoxLayout()

         layout.addWidget(self.okButton)

         self.setLayout(layout)

         QtCore.QMetaObject.connectSlotsByName(self)

     @QtCore.pyqtSlot()

     def on_okButton_clicked(self):

         print( "点击了OK按钮")

 if __name__ == "__main__":

     app =  QApplication(sys.argv)

     win = CustWidget()

     win.show()

     sys.exit(app.exec_())

from PyQt5.QtCore import *

from PyQt5.QtWidgets import *

from PyQt5 import QtWidgets

from Ui_SignalSlot import Ui_Dialog

class SignalSlot0(QDialog, Ui_Dialog):

    btn1_signal = pyqtSignal(int, str)

    btn2_signal = pyqtSignal(int, str)

    def __init__(self, parent=None):

        super(SignalSlot0, self).__init__(parent)

        self.setupUi(self)

        #self.btn1_signal.connect(self.btn1Call)

        #self.btn2_signal.connect(self.btn2Call)

    @pyqtSlot()

    def on_pushButton1_clicked(self):

        """

        Slot documentation goes here.

        """

        self.btn1_signal.connect(self.btnCall)

        self.btn1_signal.emit(1, '按钮1')

    @pyqtSlot()

    def on_pushButton2_clicked(self):

        """

        Slot documentation goes here.

        """

        self.btn2_signal.connect(self.btnCall)

        self.btn2_signal.emit(2, '按钮2')

    def btnCall(self, int1, str1):

        QMessageBox.information(self, 'information notice', 'Button{0} is clicked:{1}'.format(int1, str1), QMessageBox.Yes|QMessageBox.No, QMessageBox.Yes)

    def btn2Call(self):

        QMessageBox.information(self, 'information notice', 'Button2 clicked')

if __name__ == "__main__":

    import sys

    app = QtWidgets.QApplication(sys.argv)

    ui = SignalSlot0()

    ui.show()

    sys.exit(app.exec_())