Python 基于PyQt的GUI中的定时器
一个接一个地同时运行计时器时,我遇到了一个问题。下一个计时器正在运行,上一个计时器停止,到达时间后,上一个计时器启动。下面列出了有问题的代码Python 基于PyQt的GUI中的定时器,python,python-2.7,pyqt,pyqt4,Python,Python 2.7,Pyqt,Pyqt4,一个接一个地同时运行计时器时,我遇到了一个问题。下一个计时器正在运行,上一个计时器停止,到达时间后,上一个计时器启动。下面列出了有问题的代码 import time from PyQt4 import QtCore, QtGui import sys try: _fromUtf8 = QtCore.QString.fromUtf8 except AttributeError: def _fromUtf8(s): return s try: _enco
import time
from PyQt4 import QtCore, QtGui
import sys
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Window(QtGui.QMainWindow):
def __init__(self):
super(Window, self).__init__()
self.setGeometry(50, 50, 500, 300)
self.setWindowTitle("PyQT tuts!")
self.setWindowIcon(QtGui.QIcon('pythonlogo.png'))
self.home()
def home(self):
self.btn = QtGui.QPushButton(self)
self.btn.setObjectName(_fromUtf8("pb"))
self.btn.clicked.connect(self.timer)
self.btn.setText("Timer1")
self.btn.resize(65,25)
self.btn.move(100,100)
self.btn2 = QtGui.QPushButton(self)
self.btn2.setObjectName(_fromUtf8("pb2"))
self.btn2.clicked.connect(self.timer2)
self.btn2.setText("Timer2")
self.btn2.resize(65,25)
self.btn2.move(100,150)
self.btn3 = QtGui.QPushButton(self)
self.btn3.setObjectName(_fromUtf8("pb3"))
self.btn3.clicked.connect(self.timer3)
self.btn3.setText("Timer3")
self.btn3.resize(65,25)
self.btn3.move(100,200)
self.btn4 = QtGui.QPushButton(self)
self.btn4.setObjectName(_fromUtf8("pb4"))
self.btn4.clicked.connect(self.timer4)
self.btn4.setText("Timer4")
self.btn4.resize(65,25)
self.btn4.move(100,250)
self.show()
def timer(self):
# uin = input("enter the time : ")
when_to_stop = 10
# abs(int(uin))
while when_to_stop > 0:
m, s = divmod(when_to_stop, 60)
h, m = divmod(m, 60)
time_left = str(h).zfill(2) + ":" + str(m).zfill(2) + ":" + str(s).zfill(2)
# print(time_left+'\r')
time.sleep(1.0)
when_to_stop -= 1
self.btn.setText(str(time_left))
QtGui.qApp.processEvents()
def timer2(self):
# uin = input("enter the time : ")
when_to_stop = 10
# abs(int(uin))
while when_to_stop > 0:
m, s = divmod(when_to_stop, 60)
h, m = divmod(m, 60)
time_left = str(h).zfill(2) + ":" + str(m).zfill(2) + ":" + str(s).zfill(2)
# print(time_left+'\r')
time.sleep(1.0)
when_to_stop -= 1
self.btn2.setText(str(time_left))
QtGui.qApp.processEvents()
def timer3(self):
# uin = input("enter the time : ")
when_to_stop = 10
# abs(int(uin))
while when_to_stop > 0:
m, s = divmod(when_to_stop, 60)
h, m = divmod(m, 60)
time_left = str(h).zfill(2) + ":" + str(m).zfill(2) + ":" + str(s).zfill(2)
# print(time_left+'\r')
time.sleep(1.0)
when_to_stop -= 1
self.btn3.setText(str(time_left))
QtGui.qApp.processEvents()
def timer4(self):
# uin = input("enter the time : ")
when_to_stop = 10
# abs(int(uin))
while when_to_stop > 0:
m, s = divmod(when_to_stop, 60)
h, m = divmod(m, 60)
time_left = str(h).zfill(2) + ":" + str(m).zfill(2) + ":" + str(s).zfill(2)
# print(time_left+'\r')
time.sleep(1.0)
when_to_stop -= 1
self.btn4.setText(str(time_left))
QtGui.qApp.processEvents()
def run():
app = QtGui.QApplication(sys.argv)
GUI = Window()
sys.exit(app.exec_())
run()
<代码>时间>睡眠()>代码>不应在GUI中使用,因为它会阻塞GUI EntError循环,导致不更新GUI的问题,除了使用输入()之外,还考虑不好的实践调用<代码> PraseServices()/<代码> .< Qt提供了QTimer,它是一个专门用于每隔一定时间间隔调用特定任务的类
在下一部分中,我将展示一个示例:import sys
from PyQt4 import QtCore, QtGui
from functools import partial
class Window(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
centralwidget = QtGui.QWidget()
self.setCentralWidget(centralwidget)
layout = QtGui.QVBoxLayout(centralwidget)
for i in range(4):
button = QtGui.QPushButton("Timer{}".format(i+1))
layout.addWidget(button)
button.clicked.connect(partial(self.onClicked, button))
def onClicked(self, button):
sec = 10 # seconds
timer = button.property("timer").toPyObject()
if timer is None:
timer = QtCore.QTimer(button)
timer.stop()
timer.setInterval(1000)
timer.setProperty("button", button)
timer.setProperty("endTime", QtCore.QTime.currentTime().addMSecs(sec*1000+10))
timer.timeout.connect(partial(self.onTimeout, timer))
self.onTimeout(timer)
timer.start()
button.setProperty("timer", timer)
def onTimeout(self, timer):
button= timer.property("button")
if hasattr(button, 'toPyObject'):
button = button.toPyObject()
tm = timer.property("endTime").toPyObject()
if hasattr(tm, 'toPyObject'):
tm = tm.toPyObject()
ms = QtCore.QTime.currentTime().msecsTo(tm)
if ms < 0:
timer.stop()
else:
button.setText(QtCore.QTime().addMSecs(ms).toString())
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
ex = Window()
ex.show()
sys.exit(app.exec_())
导入系统
从PyQt4导入QtCore、QtGui
从functools导入部分
类窗口(QtGui.QMainWindow):
def uuu init uuu(self,parent=None):
超级(窗口,自我)。\uuuuu初始化\uuuuuuu(父级)
centralwidget=QtGui.QWidget()
self.setCentralWidget(centralwidget)
layout=QtGui.QVBoxLayout(centralwidget)
对于范围(4)中的i:
button=QtGui.QPushButton(“计时器{}”.format(i+1))
layout.addWidget(按钮)
按钮。单击。连接(部分(自单击,按钮))
def onClicked(自身,按钮):
秒=10秒
timer=button.property(“timer”).toPyObject()
如果计时器为“无”:
定时器=QtCore.QTimer(按钮)
计时器停止()
定时器设置间隔(1000)
timer.setProperty(“按钮”,按钮)
timer.setProperty(“endTime”,QtCore.QTime.currentTime().addMSecs(秒*1000+10))
timer.timeout.connect(部分(self.onTimeout,timer))
自动超时(计时器)
timer.start()
button.setProperty(“计时器”,计时器)
def onTimeout(自身、计时器):
button=timer.property(“按钮”)
如果hasattr(按钮“toPyObject”):
button=button.toPyObject()
tm=timer.property(“endTime”).toPyObject()
如果hasattr(tm,“toPyObject”):
tm=tm.toPyObject()
ms=QtCore.QTime.currentTime().msecsTo(tm)
如果ms<0:
计时器停止()
其他:
button.setText(QtCore.QTime().addMSecs(ms.toString())
如果uuuu name uuuuuu='\uuuuuuu main\uuuuuuu':
app=QtGui.QApplication(sys.argv)
ex=窗口()
例如:show()
sys.exit(app.exec_())
谢谢您的回复,先生,但是计时器没有在屏幕上显示任何值button@amanrawat您是否尝试过我的代码,或者是否已将其改编为初始代码?您按下按钮了吗?是的,先生,我修改了您的代码并按下了按钮,但仍然没有在按钮上显示计时器值。@AmanRaw首先尝试我的原始代码,如果它有效,问题在于您的修改,而不是我的答案。告诉我我的示例是否有效。@amanrawat好吧,它对我来说正确,python和pyqt4的版本是什么?