自定义信号和槽的步骤：
1、定义信号---signal1 = pyqtSignal()
2、定义槽信号---def setSlot(self):
3、连接信号和槽函数---signal1.connect(self.setSlot)
4、发射信号---signal1.emit()
案例1：
1 from PyQt5.QtCore import QObject,pyqtSignal
2 from PyQt5.QtWidgets import *
3 import sys
4
5 class Winfrom(QWidget):
6 #定义各种信号
7 signal1 = pyqtSignal() #无参数的信号
8 signal2 = pyqtSignal(int) #带一个参数（整型）的信号
9 signal3 = pyqtSignal(str) #带一个参数（字符串）的信号
10 signal4 = pyqtSignal(list) #带一个参数（列表）的信号
11 signal5 = pyqtSignal(dict) #带一个参数（字典）的信号
12 signal6 = pyqtSignal(int,str) #带两个参数（整数，字符串）的信号
13 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
14
15 def __init__(self,parent = None):
16 super().__init__(parent)
17 self.setWindowTitle('自定义信号和槽函数')
18 self.resize(400,300)
19 #将信号和槽连接
20 self.signal1.connect(self.signal1Call)
21 self.signal2.connect(self.signal2Call)
22 self.signal3.connect(self.signal3Call)
23 self.signal4.connect(self.signal4Call)
24 self.signal5.connect(self.signal5Call)
25 self.signal6.connect(self.signal6Call)
26 self.signal7[int,str].connect(self.signal7Call)
27 self.signal7[str].connect(self.signal7Calloverload)
28
29 #发射信号
30 self.signal1.emit()
31 self.signal2.emit(1234)
32 self.signal3.emit('熊')
33 self.signal4.emit([1,'xiong',bool])
34 self.signal5.emit({'xiong':'jt',"":1})
35 self.signal6.emit(111,'信号和槽')
36 self.signal7[int,str].emit(1314,'sb')
37 self.signal7[str].emit('wtfk')
38
39 #定义槽函数
40 def signal1Call(self):
41 print('signal1 emit')
42
43 def signal2Call(self,int1):
44 print('signal2 emit,value:',int1)
45
46 def signal3Call(self,str1):
47 print('signal3 emit,value:',str1)
48
49 def signal4Call(self,list1):
50 print('signal4 emit,value:',list1)
51
52 def signal5Call(self,dict1):
53 print('signal5 emit,value:',dict1)
54
55 def signal6Call(self,int1,str1):
56 print('signal6 emit,value:',int1,str1)
57
58 def signal7Call(self,int1,str1):
59 print('signal7 emit,value:',int1,str1)
60
61 def signal7Calloverload(self,str1):
62 print('signal7overload emit,value:',str1)
63
64 if __name__ == '__main__':
65 app = QApplication(sys.argv)
66 win = Winfrom()
67 win.show()
68 sys.exit(app.exec_())
案例2：
1 from PyQt5 import QtCore
2 from PyQt5.QtWidgets import QApplication ,QWidget ,QHBoxLayout , QPushButton
3 import sys
4
5 class CustWidget( QWidget ):
6
7 def __init__(self, parent=None):
8 super(CustWidget, self).__init__(parent)
9
10 self.okButton = QPushButton("OK", self)
11 #使用setObjectName设置对象名称
12 self.okButton.setObjectName("okButton")
13 layout = QHBoxLayout()
14 layout.addWidget(self.okButton)
15 self.setLayout(layout)
16 QtCore.QMetaObject.connectSlotsByName(self)
17
18 @QtCore.pyqtSlot()
19 def on_okButton_clicked(self):
20 print( "点击了OK按钮")
21
22
23 if __name__ == "__main__":
24 app = QApplication(sys.argv)
25 win = CustWidget()
26 win.show()
27 sys.exit(app.exec_())
案例3：
1 from PyQt5 import QtCore, QtGui, QtWidgets
2
3 class Ui_Dialog(object):
4 def setupUi(self, Dialog):
5 Dialog.setObjectName("Dialog")
6 Dialog.resize(516, 364)
7 Dialog.setSizeGripEnabled(True)
8 self.textBrowser = QtWidgets.QTextBrowser(Dialog)
9 self.textBrowser.setGeometry(QtCore.QRect(25, 20, 471, 192))
10 self.textBrowser.setObjectName("textBrowser")
11 self.pushButton1 = QtWidgets.QPushButton(Dialog)
12 self.pushButton1.setGeometry(QtCore.QRect(90, 250, 91, 31))
13 font = QtGui.QFont()
14 font.setFamily("Adobe Myungjo Std M")
15 font.setPointSize(12)
16 font.setBold(True)
17 font.setWeight(75)
18 self.pushButton1.setFont(font)
19 self.pushButton1.setObjectName("pushButton1")
20 self.pushButton2 = QtWidgets.QPushButton(Dialog)
21 self.pushButton2.setGeometry(QtCore.QRect(330, 250, 91, 31))
22 font = QtGui.QFont()
23 font.setFamily("Adobe Myungjo Std M")
24 font.setPointSize(12)
25 font.setBold(True)
26 font.setWeight(75)
27 self.pushButton2.setFont(font)
28 self.pushButton2.setObjectName("pushButton2")
29
30 self.retranslateUi(Dialog)
31 QtCore.QMetaObject.connectSlotsByName(Dialog)
32
33 def retranslateUi(self, Dialog):
34 _translate = QtCore.QCoreApplication.translate
35 Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
36 self.pushButton1.setText(_translate("Dialog", "button1"))
37 self.pushButton2.setText(_translate("Dialog", "button2"))
View Code
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_())