PyQt 线程类 QThread使用详解

•Python2.7# -*- coding: utf-8 -*-import sysfrom PyQt4 import QtCorefrom PyQt4.QtCore import QCoreApplicationfrom PyQt4.QtGui import QWidget, QPushButton, QApplication, QTextBrowserclass TimeThread(QtCore.QThread):  signal_time = QtCore.pyqtSignal(str, int) # 信号  def __init__(self, parent=None):    super(TimeThread, self).__init__(parent)    self.working = True    self.num = 0  def start_timer(self):    self.num = 0    self.start()  def run(self):    while self.working:      print "Working", self.thread()      self.signal_time.emit("Running time:", self.num) # 发送信号      self.num += 1      self.sleep(1)class TimeDialog(QWidget):  def __init__(self):    super(TimeDialog, self).__init__()    self.timer_tv = QTextBrowser(self)    self.init_ui()    self.timer_t = TimeThread()    self.timer_t.signal_time.connect(self.update_timer_tv)  def init_ui(self):    self.resize(300, 200)    self.setWindowTitle('TimeDialog')    self.timer_tv.setText("Wait")    self.timer_tv.setGeometry(QtCore.QRect(10, 145, 198, 26))    self.timer_tv.move(0, 15)    btn1 = QPushButton('Quit', self)    btn1.setToolTip('Click to quit')    btn1.resize(btn1.sizeHint())    btn1.move(200, 150)    btn1.clicked.connect(QCoreApplication.instance().quit)    start_btn = QPushButton('Start', self)    start_btn.setToolTip("Click to start")    start_btn.move(50, 150)    self.connect(start_btn, QtCore.SIGNAL("clicked()"), self.click_start_btn)  def click_start_btn(self):    self.timer_t.start_timer()  def update_timer_tv(self, text, number):    self.timer_tv.setText(self.tr(text + " " + str(number)))if __name__ == '__main__':  app = QApplication(sys.argv)  time_dialog = TimeDialog()  time_dialog.show()  sys.exit(app.exec_())