python 笔记13 信号与槽

1、 自定义信号与槽

import sys
from  PyQt5.QtWidgets import *
class ssdemo(QWidget):
    def __init__(self):
        super(ssdemo, self).__init__()
        self.initUI()
    #槽函数
    def on_colik(self):
        print(self.btn.text())
    def initUI(self):
        #添加到窗体
        self.btn = QPushButton("我的按钮",self)
        #链接到槽
        self.btn.clicked.connect(self.on_colik)

        self.resize(400,300)
        self.setWindowTitle("信号与槽")

if __name__ =='__main__':
    app =QApplication(sys.argv)
    win =ssdemo()
    win.show()
    sys.exit(app.exec_())
2、两个对象的信息传递

from PyQt5.QtCore import *
class Mysingal(QObject):
   # 定义一个信号
    sendmsg = pyqtSignal(object)
    #定义事件
    def run(self):
        self.sendmsg.emit("hello")
  # 定义一个槽类
class Mysolt(QObject):
    def get(self,msg):
        print("信息:"+msg)
if __name__ =='__main__':
   
   send = Mysingal()
   solt = Mysolt()
   send.sendmsg.connect(solt.get)
   send.run()
   send.sendmsg.disconnect(solt.get)
   send.run()

定义多个参数

from PyQt5.QtCore import *
class Mysingal(QObject):
    # 定义一个信号
    sendmsg = pyqtSignal(object)
    sendmsg1 = pyqtSignal(str,int,int)
    #发送的信息
    def run(self):
        self.sendmsg.emit("hello")
    def run1(self):
        self.sendmsg1.emit("结构",10,20)
    #定义一个槽
class Mysolt(QObject):
    #接受的信息
    def get(self,msg):
        print("信息:"+msg)
    def get1(self,msg,a,b):
        print("信息是："+msg,a+b)
if __name__ =='__main__':

   send = Mysingal()
   solt = Mysolt()
   #绑定槽
   send.sendmsg.connect(solt.get)
   send.run()
   send.sendmsg1.connect(solt.get1)
   send.run1()

5、N对N 信号与槽链接

# -*- coding: utf-8 -*-

from PyQt5.QtCore import *


class CustSignal(QObject):
    # 声明信号
    sg = pyqtSignal()
    s1 = pyqtSignal(int)
    s2 = pyqtSignal(int, str)
    s3 = pyqtSignal(list)



    # 声明承载信号，槽函数的参数可以是 int，或str类型，也可以只有一个str
    # singal6  =pyqtSignal([int,str],[str]) #[]重载 或的关系 可以是两个参数也可以是1个参数
    def __init__(self):
        super(CustSignal, self).__init__()
        self.sg.connect(self.sgcall)
        self.s1.connect(self.sgcall1)
        self.s3.connect(self.s3call)
        self.sg.emit()
        self.s1.emit(222)
        self.s3.emit([1,2,3,4,5,2])
        print("123123")
    # 声明槽
    def sgcall(self):
        print("11111")

    def sgcall1(self, val):
        print("singal1 emit,value", val)
    def s3call(self,lt):

        print("s3call emit value",lt)

if __name__ == '__main__':
    msok = CustSignal()
--------------------------------------------------------------------------

from PyQt5.QtCore import *
class nnsingal(QObject):
    s1 = pyqtSignal()
    s2 = pyqtSignal(int)
    s3 = pyqtSignal(str)

    def __init__(self):
        super(nnsingal, self).__init__()
        self.s1.connect(self.call1)
        self.s2.connect(self.call2)
        self.s3.connect(self.call1)
        self.s1.emit()
        self.s2.emit(9999)
        self.s3.emit("2123123")
        self.s1.disconnect(self.call1)
        self.s2.disconnect(self.call2)
    def call1(self):
        print("s1 emit")
    def call2(self,val):
        print("s2 emit value", val)
    def call3(self,text):
        print("s3 emit value:", text)

if __name__ =='__main__':
    ns = nnsingal()