Question

我整天都在疯狂地尝试各种各样的方式，但是我无法使用这些代码。我想要一个简单的计时器，当你按“开始”时运行一个功能，当你按“停止”时停止。

实施例：当您按开始时，该功能将每秒打印一次“Hello World”，直到您按下停止。

我的代码包含一些注释，因此您可以更快地理解：

import sys
from Tkinter import *
from threading import Timer
# a boolean for telling the timer to stop
stop_timer = False

mgui = Tk()

def work(var):
    # stop_timers sets to True or False with Start/Stop
    stop_timer = var
    # work_done will evaluate if timer should start or be canceled
    def work_done(var2):
        stop_timer = var2
        # if stop was pressed t.start() will be ignored
        if stop_timer == False:
            t.start()
        # if stop was pressed timer will stop
        if stop_timer == True:
            print "Stopped!"
            t.cancel()
    t = Timer(1, work, [False])
    print "Something"
    work_done(var)

mgui.geometry('450x450')
mgui.title('Test')

cmd1 = lambda: work(False)
btn = Button(mgui, text="Start", command =cmd1).place(x=50, y=50)
cmd2 = lambda: work(True)
btn2 = Button(mgui, text="Stop", command =cmd2).place(x=100, y=50)

mgui.mainloop()

正如你所知，我是这个shizzle的新手！谢谢，伙伴们！

Answer 1

这是一个通用计时器，你也可以使用after在

中实现tkinter中的一个

import time
import Tkinter as tk

import threading

class MyTimer(threading.Thread):

    def __init__(self, t):
        super(MyTimer,self).__init__()
        self.txt = t
        self.running = True

    def run(self):
        while self.running:
            self.txt['text'] = time.time()        


mgui = tk.Tk()
mgui.title('Test')

txt = tk.Label(mgui, text="time")
txt.grid(row=0,columnspan=2)

timer = None
def cmd1():
    global timer
    timer = MyTimer(txt)
    timer.start()
def cmd2():
    global timer
    if timer:
        timer.running = False
        timer= None

btn = tk.Button(mgui, text="Start", command =cmd1)
btn.grid(row=1,column=1)
btn2 = tk.Button(mgui, text="Stop", command =cmd2)
btn2.grid(row=1,column=2)

mgui.mainloop()

Answer 2

通过在xndrme的帖子中编辑一些内容，我终于开始工作了。谢谢！

我会在这里发布可能的未来google的代码。

import sys
from Tkinter import *
from threading import Timer

mgui = Tk()

def cmd2():
    global t
    if t:
        t.cancel()

def looper():
    global t
    t = Timer(1, looper)
    t.start()
    print "Hello World!"

mgui.geometry('450x450')
mgui.title('Test')

btn = Button(mgui, text="Start", command =looper).place(x=50, y=50)
btn2 = Button(mgui, text="Stop", command =cmd2).place(x=100, y=50)

mgui.mainloop()

如何在python中添加带启动/停止GUI的计时器

2 个答案: