Pyqt5如何避免由while循环无限冻结程序？

我想知道，我怎么能我按一下按钮self.runButton.clicked.connect(self.iniciar)Pyqt5如何避免由while循环无限冻结程序？

程序冻结每次停止功能iniciar

的过程中，我不能做其他动作。

我希望定时器继续在功能iniciar一直无限重复的工作。

也是self.runButton1停止功能iniciar按钮。

我的代码：

#!/usr/bin/env python3 

# Program created for play audios of time in zapoteco' 
# 
# Created by: Python 3.6, PyQt5 5.9.2. 
# 
# Author: Raul Espinosa [email protected] 
# 
# WARNING! All changes made in this file will be lost! 
# 
# Version 0.2 GUI 

import time 
import subprocess 

from PyQt5 import QtCore, QtGui, QtWidgets 

class Ui_Form(object): 
    def setupUi(self, Form): 
     Form.setObjectName("Form") 
     Form.resize(383, 263) 
     palette = QtGui.QPalette() 
     brush = QtGui.QBrush(QtGui.QColor(164, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Button, brush) 
     brush = QtGui.QBrush(QtGui.QColor(138, 226, 52)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Light, brush) 
     brush = QtGui.QBrush(QtGui.QColor(164, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Text, brush) 
     brush = QtGui.QBrush(QtGui.QColor(173, 127, 168)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(114, 159, 207)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Shadow, brush) 
     brush = QtGui.QBrush(QtGui.QColor(164, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Button, brush) 
     brush = QtGui.QBrush(QtGui.QColor(138, 226, 52)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Light, brush) 
     brush = QtGui.QBrush(QtGui.QColor(164, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Text, brush) 
     brush = QtGui.QBrush(QtGui.QColor(173, 127, 168)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(114, 159, 207)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Shadow, brush) 
     brush = QtGui.QBrush(QtGui.QColor(46, 52, 54)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Button, brush) 
     brush = QtGui.QBrush(QtGui.QColor(138, 226, 52)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Light, brush) 
     brush = QtGui.QBrush(QtGui.QColor(190, 190, 190)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Text, brush) 
     brush = QtGui.QBrush(QtGui.QColor(114, 159, 207)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(114, 159, 207)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Shadow, brush) 
     Form.setPalette(palette) 
     Form.setPalette(palette) 
     self.label = QtWidgets.QLabel(Form) 
     self.label.setGeometry(QtCore.QRect(10, 0, 361, 181)) 
     self.label.setObjectName("label") 
     self.horizontalSlider = QtWidgets.QSlider(Form) 
     self.horizontalSlider.setGeometry(QtCore.QRect(110, 240, 160, 16)) 
     self.horizontalSlider.setOrientation(QtCore.Qt.Horizontal) 
     self.horizontalSlider.setObjectName("horizontalSlider") 
     self.horizontalSlider.setRange(0,100) 
     self.horizontalSlider.setSingleStep(1) 
     self.horizontalSlider.valueChanged.connect(self.valueHandler) 
     self.runButton = QtWidgets.QPushButton(Form) 
     self.runButton.setGeometry(QtCore.QRect(50, 180, 80, 25)) 
     self.runButton.setObjectName("runButton") 
     self.runButton.clicked.connect(self.iniciar) 
     self.runButton1 = QtWidgets.QPushButton(Form) 
     self.runButton1.setGeometry(QtCore.QRect(250, 180, 80, 25)) 
     self.runButton1.setObjectName("runButton1") 
     self.label_2 = QtWidgets.QLabel(Form) 
     self.label_2.setGeometry(QtCore.QRect(160, 220, 55, 17)) 
     self.label_2.setObjectName("label_2") 
     self.timer = QtCore.QTimer(Form) 
     self.timer.timeout.connect(self.Time) 
     self.timer.start(1000) 
     self.lcdNumber = QtWidgets.QLCDNumber(Form) 
     self.lcdNumber.setGeometry(QtCore.QRect(280, 0, 101, 61)) 
     self.lcdNumber.setInputMethodHints(QtCore.Qt.ImhNone) 
     self.lcdNumber.setFrameShape(QtWidgets.QFrame.NoFrame) 
     self.lcdNumber.setFrameShadow(QtWidgets.QFrame.Raised) 
     self.lcdNumber.setSmallDecimalPoint(True) 
     self.lcdNumber.setDigitCount(5) 
     self.lcdNumber.setMode(QtWidgets.QLCDNumber.Dec) 
     self.lcdNumber.setSegmentStyle(QtWidgets.QLCDNumber.Flat) 
     self.lcdNumber.display(time.strftime("%H"+":"+"%M")) 
     #tiempo = time.strftime("%H"+":"+"%M") 
     #print (tiempo) 
     #self.lcdNumber.setProperty("value", 12:20) 
     self.lcdNumber.setObjectName("lcdNumber") 
     self.retranslateUi(Form) 
     QtCore.QMetaObject.connectSlotsByName(Form) 

    def Time(self): 
     self.lcdNumber.display(time.strftime("%H"+":"+"%M")) 

    def valueHandler(self,value): 
     scaledValue = float(value)/100 
     print (scaledValue) , type(scaledValue) 
     return scaledValue 

    def retranslateUi(self, Form): 
     _translate = QtCore.QCoreApplication.translate 
     Form.setWindowTitle(_translate("Form", "XIGABA")) 
     Form.setToolTip(_translate("Form", "<html><head/><body><pre style=\" margin-top:0px; margin-bottom:15px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#ffffff;\"><span style=\" font-family:\'monospace\'; background-color:#ffffff;\">Creado con Software Libre.</span></pre></body></html>")) 
     self.label.setToolTip(_translate("Form", "<html><head/><body><p>Dictador de horario.</p></body></html>")) 
     self.label.setText(_translate("Form", "<html><head/><body><pre align=\"center\" style=\" margin-top:15px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><a name=\"taag_output_text\"/><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">)</span><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\"> (        </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\"> (/()\\) (  (  ( (  </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">)\\()|()/()\\) )\\ ()\\ )\\  </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">((_)\\ /(_)|()/(((((_)()((_|(((_)( </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">__((_|_)) /(_))_)\\ _)((_)_)\\ _)\\ </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">\\ \\/ /_ _|(_)) __(_)_\\(_) _)(_)_\\(_) </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\"> &gt; &lt; | | | (_ |/ _ \\ | _ \\/_ \\ </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:15px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; color:#555753; background-color:#729fcf;\">/_/\\_\\___| \\___/_/ \\_\\|___//_/ \\_\\ </span></pre><pre align=\"center\" style=\" margin-top:0px; margin-bottom:15px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#729fcf;\"><span style=\" font-family:\'monospace\'; font-size:6pt; color:#555753; background-color:#729fcf;\">version 0.2 GUI</span></pre></body></html>")) 
     self.runButton.setText(_translate("Form", "Iniciar")) 
     self.runButton1.setText(_translate("Form", "Detener")) 
     self.label_2.setText(_translate("Form", "<html><head/><body><pre align=\"center\" style=\" margin-top:0px; margin-bottom:15px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; background-color:#000000;\"><a name=\"taag_output_text\"/><span style=\" font-family:\'monospace\'; color:#ef2929; background-color:#000000;\">VOLUMEN</span></pre></body></html>")) 

    def iniciar(self): 
     self.runButton1.setEnabled(True) 
     position = self.horizontalSlider.value() 
     scaledValue = float(position)/100 
     print (scaledValue) , type(scaledValue) 

     while (True): 
      time.sleep(0.5) 
      second_test = time.strftime('%S') 
      minute_test = time.strftime('%M') 
      hour_test = time.strftime('%H') 
      tiempo = time.strftime("%H"+":"+"%M") 
      print (tiempo) 
      self.lcdNumber.setProperty("value", tiempo) 
      if int(minute_test) == int(00) and int(second_test) == int(00): 
       print ('llego al hora exacta') 
       filen = 'HRS' + hour_test + '_O.mp3.mp3' 
       print (filen) 
       subprocess.Popen(["play", filen, "vol", scaledValue]).communicate() 
      elif int(second_test) == int(00): 
       print ('llego al minuto') 
       filen = 'HRS' + hour_test + '.mp3' 
       filen2 = 'MIN' + minute_test + '.mp3.mp3' 
       print (filen) 
       print (filen2) 
       subprocess.Popen(["play", filen, "vol", str(scaledValue)]).communicate() 
       subprocess.Popen(["play", filen2, "vol", str(scaledValue)]).communicate() 

if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    Form = QtWidgets.QWidget() 
    ui = Ui_Form() 
    ui.setupUi(Form) 
    Form.show() 
    sys.exit(app.exec_())

我使用python3.6和pyqt5

来源

2017-12-27 laur

从我可以告诉你的方法'iniciar'将花费其大部分时间都在睡觉，并会，因此，阻止'Qt'事件循环。更好的方法可能是利用['QTimer']（http://doc.qt.io/qt-5/qtimer.html）进行计时事件和['QProcess']（http：// doc .qt.io/QT-5/qprocess.html），用于处理执行/控制。这样，你可以使用'Qt'的信号/槽机制，以避免阻塞事件循环。 –

阻断循环一样，而真正的你使用不适合一个GUI，因为他们不会让你做的典型像检查事件，信号和插槽一样的GUI任务。

在Qt，因此也PyQt的，有方法来避免这些问题，你的情况可能的解决方案是使用线程，一个简单的方法来实现它们使用QRunnable和QThreadPool，但在此之前，这是可取改变你的代码。

Qt设计提供了可实现小部件设计一个类，但它不是一个小部件，它是适当的创建从相应的控件继承的类，并使用初始类来填充它。

class Widget(QtWidgets.QWidget, Ui_Form): 
    def __init__(self, *args, **kwargs): 
     QtWidgets.QWidget.__init__(self, *args, **kwargs) 
     self.setupUi(self) 
     self.runButton.clicked.connect(self.iniciar) 
     self.timer.timeout.connect(self.update_time) 
     self.horizontalSlider.valueChanged.connect(self.valueHandler) 

    def update_time(self): 
     self.lcdNumber.display(time.strftime("%H" + ":" + "%M")) 

    def valueHandler(self, value): 
     scaledValue = float(value)/100 
     print(scaledValue), type(scaledValue) 
     return scaledValue 

    def iniciar(self): 
     self.runButton1.setEnabled(True) 
     position = self.horizontalSlider.value() 
     scaledValue = float(position)/100 
     print(scaledValue), type(scaledValue) 
     self.runnable = Runnable(self) 
     QtCore.QThreadPool.globalInstance().start(self.runnable)

在下一节中，我实现了QRunnable，我们通过小部件，这个部件将被用于进行通信，并更新GUI数据，因为Qt的法则是，GUI不应该从另一个线程更新，一个解决方案是使用QMetaObject.invokeMethod：

class Runnable(QtCore.QRunnable): 
    def __init__(self, w, *args, **kwargs): 
     QtCore.QRunnable.__init__(self, *args, **kwargs) 
     self.w = w 
     self.position_initial = self.w.horizontalSlider.value() 

    def run(self): 
     scaledValue = float(self.position_initial)/100 

     print(scaledValue) 
     while True: 
      time.sleep(0.5) 
      second_test = time.strftime('%S') 
      minute_test = time.strftime('%M') 
      hour_test = time.strftime('%H') 
      tiempo = time.strftime("%H" + ":" + "%M") 
      print(tiempo) 
      QtCore.QMetaObject.invokeMethod(self.w.lcdNumber, "display", 
              QtCore.Qt.QueuedConnection, 
              QtCore.Q_ARG(str, tiempo)) 
      if int(minute_test) == int(00) and int(second_test) == int(00): 
       print('llego al hora exacta') 
       filen = 'HRS' + hour_test + '_O.mp3.mp3' 
       print(filen) 
       subprocess.Popen(["play", filen, "vol", scaledValue]).communicate() 
      elif int(second_test) == int(00): 
       print('llego al minuto') 
       filen = 'HRS' + hour_test + '.mp3' 
       filen2 = 'MIN' + minute_test + '.mp3.mp3' 
       print(filen) 
       print(filen2) 
       subprocess.Popen(["play", filen, "vol", str(scaledValue)]).communicate() 
       subprocess.Popen(["play", filen2, "vol", str(scaledValue)]).communicate()

然后，如在iniciar方法来实现，我们所说的可运行通过QThreadPool：

self.runnable = Runnable(self) 
QtCore.QThreadPool.globalInstance().start(self.runnable)

完整的代码可以在以下link找到。

PS：

如果你想添加一个停止，我们必须改变一些事情，例如替代的，而真正的你应该使用一个标志，并更改标志的状态：

class Runnable(QtCore.QRunnable): 
    def __init__(self, w, *args, **kwargs): 
     QtCore.QRunnable.__init__(self, *args, **kwargs) 
     self.w = w 
     self.position_initial = self.w.horizontalSlider.value() 
     self.m_stopped = False 

    def run(self): 
     scaledValue = float(self.position_initial)/100 

     print(scaledValue) 
     while not self.m_stopped: 
      [...] 

    def stop(self): 
     self.m_stopped = True

然后我们创建了detener方法：

def detener(self): 
    self.runButton.setEnabled(True) 
    self.runButton1.setEnabled(False) 
    self.runnable.stop()

来源

2017-12-27 23:58:12 eyllanesc

感谢您的工作！我加'self.runButton1.clicked.connect（self。detener）'和机能的研究'DEF detener（个体）： \t self.runButton.setEnabled（真） \t self.runButton1.setEnabled（假） \t self.runnable =可运行（个体） \t QtCore.QThreadPool.globalInstance（）.stop（self.runnable）'但不停止存在？ – laur

如果你已经阅读了文档，你会看到QThreadPool没有停止方法，在一会儿我会告诉你如何停止执行： – eyllanesc

谢谢@eyllanesc – laur

Pyqt5如何避免由while循环无限冻结程序？

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