【多线程】python界面阻塞，白屏，not responding解决的简单例子

 1 # -*- coding: utf-8 -*- 2  3 import sys, time 4 from PyQt4.QtCore import * 5 from PyQt4.QtGui import * 6 x = 0 7 class Window(QWidget): 8     def __init__(self, parent = None): 9         QWidget.__init__(self, parent)10         self.thread = Worker()11 12         # 提示信息13         self.xLable = QLabel("Number of xTimes:")14         # 下拉框15         self.spinBox = QSpinBox()16         self.spinBox.setMaximum(100)17         self.spinBox.setValue(10)18         self.startButton = QPushButton(self.tr("&Start"))19         # 布局20         layout = QGridLayout()21         layout.addWidget(self.xLable, 0, 0)22         layout.addWidget(self.spinBox, 0, 1)23         layout.addWidget(self.startButton, 0, 2)24         self.setLayout(layout)25         # 标题26         self.setWindowTitle(self.tr("Threading"))27 28         # 信号29         self.connect(self.thread, SIGNAL("finished()"), self.finishSend)30         self.connect(self.thread, SIGNAL("update(int)"), self.updateGUIStatus)31         self.connect(self.startButton, SIGNAL("clicked()"), self.sendAdvMail)32 33     def sendAdvMail(self):34         self.spinBox.setReadOnly(True)35         self.startButton.setEnabled(False)36         #传递值到线程中37         self.thread.render(self.spinBox.value())38 39     def updateGUIStatus(self, leftTime):40         self.xLable.setText(str(leftTime))41 42     def finishSend(self):43         self.spinBox.setReadOnly(False)44         self.startButton.setEnabled(True)45 46 class Worker(QThread):47     def __init__(self, parent = None):48         QThread.__init__(self, parent)49         self.exiting = False50         self.xTimes = 051 52     def __del__(self):53         self.exiting = True54         self.wait()55 56     def render(self, xTimes):57         self.xTimes = xTimes58         self.start()59 60     def run(self):61         # Note: This is never called directly. It is called by Qt once the62         # thread environment has been set up.63         n = self.xTimes64         while not self.exiting and n > 0:65             time.sleep(1)66             #该信号引起界面更新67             n -= 168             self.emit(SIGNAL("update(int)"), n)69 70 71 if __name__ == "__main__":72     app = QApplication(sys.argv)73     window = Window()74     window.show()75     sys.exit(app.exec_())

编辑器加载中...