python pyqt5 QThread

-- coding: utf-8 --

'''
【简介】
PyQT5中 QTimer例子

'''

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *

global sec
sec = 0

class WorkThread(QThread):
trigger = pyqtSignal()

def __int__(self):
    super(WorkThread, self).__init__()

def run(self):
    for i in range(2000000000):
        pass

    # 循环完毕后发出信号
    self.trigger.emit()

def countTime():
global sec
sec += 1
# LED显示数字+1
lcdNumber.display(sec)

def work():
# 计时器每秒计数
timer.start(1000)
# 计时开始
workThread.start()
# 当获得循环完毕的信号时，停止计数
workThread.trigger.connect(timeStop)

def timeStop():
timer.stop()
print("运行结束用时", lcdNumber.value())
global sec
sec = 0

if name == "main":
app = QApplication(sys.argv)
top = QWidget()
top.resize(300, 120)

# 垂直布局类QVBoxLayout
layout = QVBoxLayout(top)
# 加个显示屏
lcdNumber = QLCDNumber()
layout.addWidget(lcdNumber)
button = QPushButton("测试")
layout.addWidget(button)

timer = QTimer()
workThread = WorkThread()

button.clicked.connect(work)
# 每次计时结束，触发 countTime
timer.timeout.connect(countTime)

top.show()
sys.exit(app.exec_())

---

-- coding: utf-8 --

'''
【简介】
PyQT5中 QThread 例子

'''

from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys

class MainWidget(QWidget):
def init(self, parent=None):
super(MainWidget, self).init(parent)
self.setWindowTitle("QThread 例子")
self.thread = Worker()
self.listFile = QListWidget()
self.btnStart = QPushButton('开始')
layout = QGridLayout(self)
layout.addWidget(self.listFile, 0, 0, 1, 2)
layout.addWidget(self.btnStart, 1, 1)
self.btnStart.clicked.connect(self.slotStart)
self.thread.sinOut.connect(self.slotAdd)

def slotAdd(self, file_inf):
    self.listFile.addItem(file_inf)

def slotStart(self):
    self.btnStart.setEnabled(False)
    self.thread.start()

class Worker(QThread):
sinOut = pyqtSignal(str)

def __init__(self, parent=None):
    super(Worker, self).__init__(parent)
    self.working = True
    self.num = 0

def __del__(self):
    self.working = False
    self.wait()

def run(self):
    while self.working == True:
        file_str = 'File index {0}'.format(self.num)
        self.num += 1
        # 发出信号
        self.sinOut.emit(file_str)
        # 线程休眠2秒
        self.sleep(2)

if name == "main":
app = QApplication(sys.argv)
demo = MainWidget()
demo.show()
sys.exit(app.exec_())