'''
【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
self.sinOut.emit(file_str)
self.sleep(2)
if __name__ == "__main__":
app = QApplication(sys.argv)
demo = MainWidget()
demo.show()
sys.exit(app.exec_())
'''
【简介】
PyQT5中 QThread 例子
'''
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
global sec
sec=0
def setTime():
global sec
sec+=1
lcdNumber.display(sec)
def work():
timer.start(1000)
for i in range(2000000000):
pass
timer.stop()
if __name__ == "__main__":
app = QApplication(sys.argv)
top = QWidget()
top.resize(300,120)
layout = QVBoxLayout(top)
lcdNumber = QLCDNumber()
layout.addWidget(lcdNumber)
button=QPushButton("测试")
layout.addWidget(button)
timer = QTimer()
timer.timeout.connect(setTime)
button.clicked.connect(work)
top.show()
sys.exit(app.exec_())
应用:分离UI主线程与工作线程
'''
【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
self.trigger.emit()
def countTime():
global sec
sec += 1
lcdNumber.display(sec)
def work():
timer.start(1000)
workThread.start()
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)
layout = QVBoxLayout(top)
lcdNumber = QLCDNumber()
layout.addWidget(lcdNumber)
button = QPushButton("测试")
layout.addWidget(button)
timer = QTimer()
workThread = WorkThread()
button.clicked.connect(work)
timer.timeout.connect(countTime)
top.show()
sys.exit(app.exec_())
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