[编辑，因为
QThread令人困惑/困惑]
似乎有两种使用方式，要么将其子类化（如您的示例和文档所述），要么创建一个worker对象，然后将其移动到线程中（请参阅此博客文章）。然后，当您混入信号/插槽时，我会更加困惑。正如Avaris所说，这种变化可能不是您的问题。
我将您的
Worker课程重新设计为的子课程
QObject（因为这是我理解的风格）。
一个问题是，如果不将a
sleep放入假数据系统中，则会在不到1秒的时间内生成所有对主窗口的回调。然后，主线程在清除信号队列时实际上被阻塞了。如果将延迟设置为指定的延迟（0.0005s），则它会通过生成远远超过其显示速度的数据来加速运行，这似乎表明这可能不适合您的问题（务实，您也可以看不到那么快，而且似乎可以以30-40
fps播放）。
import time, random, sys#from PySide.QtCore import *#from PySide.QtGui import *from PyQt4 import QtCorefrom PyQt4 import QtGuifrom matplotlib.figure import Figurefrom matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbarfrom matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvasclass ApplicationWindow(QtGui.QMainWindow): get_data = QtCore.pyqtSignal() def __init__(self, parent = None): QtGui.QMainWindow.__init__(self, parent) self.thread = QtCore.QThread(parent=self) self.worker = Worker(parent=None) self.worker.moveToThread(self.thread) self.create_main_frame() self.create_status_bar() self.startButton.clicked.connect(self.start_acquisition) self.stopButton.clicked.connect(self.stop_acquisition) self.worker.pixel_list.connect(self.update_figure) self.worker.done.connect(self.update_UI) self.get_data.connect(self.worker.get_data) self.thread.start() def create_main_frame(self): self.main_frame = QtGui.QWidget() self.dpi = 100 self.width = 10 self.height = 8 self.fig = Figure(figsize=(self.width, self.height), dpi=self.dpi) self.axes = self.fig.add_subplot(111) self.axes.axis((0,512,0,120)) self.canvas = FigureCanvas(self.fig) self.canvas.setParent(self.main_frame) self.canvas.updateGeometry() self.canvas.draw() self.background = None self.lE_line, = self.axes.plot(range(512), [0 for i in xrange(512)], animated=True) self.hE_line, = self.axes.plot(range(512), [0 for i in xrange(512)], animated=True) self.mpl_toolbar = NavigationToolbar(self.canvas, self.main_frame) self.startButton = QtGui.QPushButton(self.tr("&Start")) self.stopButton = QtGui.QPushButton(self.tr("&Stop")) layout = QtGui.QGridLayout() layout.addWidget(self.canvas, 0, 0) layout.addWidget(self.mpl_toolbar, 1, 0) layout.addWidget(self.startButton, 2, 0) layout.addWidget(self.stopButton, 2, 1) self.main_frame.setLayout(layout) self.setCentralWidget(self.main_frame) self.setWindowTitle(self.tr("XRTdev Interface")) def create_status_bar(self): self.status_text = QtGui.QLabel("I am a status bar. I need a status to show!") self.statusBar().addWidget(self.status_text, 1) def start_acquisition(self): self.worker.exiting = False self.startButton.setEnabled(False) self.stopButton.setEnabled(True) self.get_data.emit() def stop_acquisition(self): self.worker.exiting = True self.startButton.setEnabled(True) self.stopButton.setEnabled(False) self.cleanup_UI() def update_figure(self, lE, hE): if self.background == None: self.background = self.canvas.copy_from_bbox(self.axes.bbox) self.canvas.restore_region(self.background) self.lE_line.set_ydata(lE) self.hE_line.set_ydata(hE) self.axes.draw_artist(self.lE_line) self.axes.draw_artist(self.hE_line) self.canvas.blit(self.axes.bbox) def update_UI(self): self.startButton.setEnabled(True) self.stopButton.setEnabled(False) self.cleanup_UI() def cleanup_UI(self): self.background = None self.axes.clear() self.canvas.draw()class Worker(QtCore.QObject): pixel_list = QtCore.pyqtSignal(list, list) done = QtCore.pyqtSignal() def __init__(self, parent = None): QtCore.QObject.__init__(self, parent) self.exiting = True @QtCore.pyqtSlot() def get_data(self): # simulate I/O print 'data_start' n = random.randrange(100,200) while not self.exiting and n > 0: lE = [random.randrange(5,16) for i in xrange(512)] hE = [random.randrange(80,121) for i in xrange(512)] self.pixel_list.emit(lE, hE) time.sleep(0.05) n -= 1 print 'n: ', n self.done.emit()
