Pyqt5 如何避免无限while循环冻结程序？
[英]Pyqt5 How to avoid freezing program by an infinite while loop?
问题描述
我想知道，我怎样才能停止函数iniciar
每次我点击按钮self.runButton.clicked.connect(self.iniciar)
程序冻结，我无法执行其他操作。
我希望计时器继续工作，同时函数iniciar无限重复。
还有按钮self.runButton1停止函数iniciar 。
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 raul@ninja-code.de
#
# 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;\"> > < | | | (_ |/ _ \\ | _ \\ / _ \\ </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_())
我用的是python3.6和pyqt5
1 个解决方案
解决方案1
1 已采纳 2017-12-27 23:58:12
您使用的 while true 之类的阻塞循环不适合 GUI，因为它们不允许您执行 GUI 的典型任务，例如检查事件、信号和插槽。
在 Qt 和 PyQt 中，有一些方法可以避免这些问题，针对您的情况的一种可能解决方案是使用线程，实现它们的一种简单方法是使用 QRunnable 和 QThreadPool，但在此之前建议您修改代码.
Qt Designer 提供了一个可以在widget 中实现设计的类，但它不是一个widget，创建一个从相应widget 继承的类并使用初始类来填充它是合适的。
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并传递了小部件，该小部件将用于通信和更新 GUI 数据，因为 Qt 的规则是不应从另一个线程更新 GUI，对此的解决方案是使用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，在实施iniciar方法，我们通过调用运行的QThreadPool ：
self.runnable = Runnable(self)
QtCore.QThreadPool.globalInstance().start(self.runnable)
可以在以下链接中找到完整的代码。
附注：
如果你想添加一个止损，我们必须改变一些东西，例如你应该使用一个标志而不是 True ，并改变标志的状态：
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()
带有 pyqt5 window 的 IBM Watson 在 while 循环中冻结
[英]IBM Watson with pyqt5 window is freezing in the while loop
以最简单的方式在 PyQt5 的工作线程中停止无限循环
[英]Stopping an infinite loop in a worker thread in PyQt5 the simplest way
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