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_())