利用PyQt中的QThread类实现多线程

from PyQt5.QtCore import QThread

class SubThread(QThread):

from PyQt5.QtCore import QThread

class SubThread(QThread): 
 def __init__(self):  
  super().__init__()  
  # 以下加入需要的代码 
  
 def __del__(self):  
  self.wait() 
  
 def run(self):  
  # 以下加入子线程执行的代码

if __name__ == '__main__': 
 app = QtWidgets.QApplication(sys.argv) 
 subthread = SubThread() 
 subthread.start() 
 sys.exit(app.exec_())

from PyQt5.QtCore import QThread, pyqtSignal

class SubThread(QThread): 
 messagetrigger = pyqtSignal(str) 
 
 def __init__(self):  
  super().__init__()  
  # 以下加入需要的代码 
  
 def __del__(self):  
  self.wait() 

 def run(self):  
  # 以下加入子线程执行的代码

import timefrom PyQt5.QtCore 
import QThread, pyqtSignal, QObject

class SubThread(QThread): 
 messagetrigger = pyqtSignal(str) 

 def __init__(self):  
  super().__init__() 

 def __del__(self):  
  self.wait() 

 def run(self):  
  self.messagetrigger.emit('子线程开始')  
  time.sleep(2)  
  self.messagetrigger.emit('子线程结束')

import sysimport timefrom PyQt5.QtCore 
import QThread, pyqtSignal, QObject
from PyQt5 import QtWidgets

class SubThread(QThread): 
 messagetrigger = pyqtSignal(str) 

 def __init__(self):  
  super().__init__() 

 def __del__(self):  
  self.wait() 

 def run(self):  
  self.messagetrigger.emit('子线程开始')  
  time.sleep(2)  
  self.messagetrigger.emit('子线程结束')
  
def callback(msg): 
 print(msg)
 
if __name__ == '__main__': 
 app = QtWidgets.QApplication(sys.argv) 
 subthread = SubThread() 
 subthread.messagetrigger.connect(callback) 
 subthread.start() 
 sys.exit(app.exec_())