使用QT设计师-信号和槽signal-slot（第一弹）

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：

 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_())

案例2：

 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_())

案例3：

 from PyQt5 import QtCore, QtGui, QtWidgets

 class Ui_Dialog(object):
     def setupUi(self, Dialog):
         Dialog.setObjectName("Dialog")
         Dialog.resize(516, 364)
         Dialog.setSizeGripEnabled(True)
         self.textBrowser = QtWidgets.QTextBrowser(Dialog)
         self.textBrowser.setGeometry(QtCore.QRect(25, 20, 471, 192))
         self.textBrowser.setObjectName("textBrowser")
         self.pushButton1 = QtWidgets.QPushButton(Dialog)
         self.pushButton1.setGeometry(QtCore.QRect(90, 250, 91, 31))
         font = QtGui.QFont()
         font.setFamily("Adobe Myungjo Std M")
         font.setPointSize(12)
         font.setBold(True)
         font.setWeight(75)
         self.pushButton1.setFont(font)
         self.pushButton1.setObjectName("pushButton1")
         self.pushButton2 = QtWidgets.QPushButton(Dialog)
         self.pushButton2.setGeometry(QtCore.QRect(330, 250, 91, 31))
         font = QtGui.QFont()
         font.setFamily("Adobe Myungjo Std M")
         font.setPointSize(12)
         font.setBold(True)
         font.setWeight(75)
         self.pushButton2.setFont(font)
         self.pushButton2.setObjectName("pushButton2")

         self.retranslateUi(Dialog)
         QtCore.QMetaObject.connectSlotsByName(Dialog)

     def retranslateUi(self, Dialog):
         _translate = QtCore.QCoreApplication.translate
         Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
         self.pushButton1.setText(_translate("Dialog", "button1"))
         self.pushButton2.setText(_translate("Dialog", "button2"))

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_())