gpt4 book ai didi

python - 为什么这种结束线程的方法不起作用?

转载 作者:行者123 更新时间:2023-11-30 23:57:38 25 4
gpt4 key购买 nike

我刚刚用我的菜鸟方式结束了一个线程,但我不知道为什么它不起作用。有人可以帮我吗?

这是我的示例代码:

import wx
import thread
import time
import threading

class TestFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, parent = None, id = -1, title = "Testing", pos=(350, 110), size=(490, 200), style=wx.SYSTEM_MENU | wx.CAPTION | wx.CLOSE_BOX | wx.MINIMIZE_BOX)
self.panel = wx.Panel(self)

self.stop = False

self.StartButton = wx.Button(parent = self.panel, id = -1, label = "Start", pos = (110, 17), size = (50, 20))
self.MultiLine = wx.TextCtrl(parent = self.panel, id = -1, pos = (38, 70), size = (410, 90), style = wx.TE_MULTILINE|wx.TE_READONLY|wx.TE_AUTO_URL)


self.Bind(wx.EVT_BUTTON, self.OnStart, self.StartButton)
self.Bind(wx.EVT_CLOSE, self.OnClose)

def OnStart(self, event):
self.StartButton.Disable()
self.NewThread = threading.Thread(target = self.LongRunning)
self.NewThread.start()

def OnClose(self, event):
self.stop = True
BusyBox = wx.BusyInfo("Just a moment please!", self)
wx.Yield()

while True:
try:
if not self.NewThread.isAlive():
self.Destroy()
break
time.sleep(0.5)
except:
self.Destroy()
break

def LongRunning(self):
Counter = 1

while True:
time.sleep(2)
print "Hello, ", Counter
self.MultiLine.AppendText("hello, " + str(Counter) + "\n") #If you comment out this line, everything works fine. Why can't I update the fame after I hit the close button?
Counter = Counter + 1
if self.stop:
break

class TestApp(wx.App):
def OnInit(self):
self.TestFrame = TestFrame()
self.TestFrame.Show()
self.SetTopWindow(self.TestFrame)
return True

def main():
App = TestApp(redirect = False)
App.MainLoop()

if __name__ == "__main__":
main()

正如您在我的代码中看到的,线程中有一个无限循环,我告诉线程要做的是一旦单击关闭按钮就跳出循环。但问题是,每次我点击关闭按钮时,代码似乎都停留在 self.MultiLine.AppendText("hello, "+ str(Counter) + "\n") 行,我不知道为什么。有人可以帮忙吗?

最佳答案

更新多行时尝试使用线程安全方法,例如 wx.CallAfter

 def LongRunning(self):
Counter = 1

while True:
time.sleep(2)
print "Hello, ", Counter

wx.CallAfter(self.updateMultiLine, "hello, " + str(Counter) + "\n")
Counter = Counter + 1
if self.stop:
break

def updateMultiLine(self, data):
self.MultiLine.AppendText(data)

关于python - 为什么这种结束线程的方法不起作用?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3609627/

25 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com