如何解决每次循环时,我在Tkinter中的一分钟进度条变得越来越不准确
更多详细信息:我要制作的东西是一个长达一分钟的进度条,一旦结束,它将重新启动并循环播放。顶部的代码用于使进程在新的分钟开始时自动启动。问题是,进度条可以同步并自行启动,但是在一两分钟后它开始变慢几秒钟,最令人困惑的部分是它根本不一致,以不同的速度变慢每次我运行它。任何帮助将不胜感激。
这是我的代码:
import time
from tkinter import *
import datetime as dt
from tkinter.ttk import *
now = dt.datetime.now()
sync_now = '%02d:%02d:%02d' % (now.hour,now.minute,now.second)
sync_now_object = dt.datetime.strptime(sync_now,'%H:%M:%S').time()
second_of_day = int(now.hour * 60 * 60 + now.minute * 60 + now.second)
second_of_day = int(second_of_day / 60) * 60 + 60
hour = int(second_of_day / 60 / 60)
minute = int((second_of_day % (60 * 60)) / 60)
second = int(second_of_day % 60)
target_time = dt.time(hour,minute,second)
target_time_str = str(target_time)
print(target_time)
print(sync_now)
def time_to_num(time_str):
hh,mm,ss = map(int,time_str.split(':'))
return ss + 60*(mm + 60*hh)
difference_target_now=time_to_num(target_time_str)-time_to_num(sync_now)
print(difference_target_now)
after_difference = difference_target_now*1000
print(after_difference)
# creating Tk window
app = Tk()
app.wm_attributes('-topmost',1)
# setting geometry of tk window
app.geometry("600x100")
# Using title() to display a message in
# the dialogue box of the message in the
# title bar.
app.title("")
progress = Progressbar(app,orient=HORIZONTAL,length=600,mode='determinate')
def my_progress():
progress['maximum'] = 60
progress['value'] = 1
app.update()
time.sleep(1)
progress['value'] = 2
app.update()
time.sleep(1)
progress['value'] = 3
app.update()
time.sleep(1)
progress['value'] = 4
app.update()
time.sleep(1)
progress['value'] = 5
app.update()
time.sleep(1)
progress['value'] = 6
app.update()
time.sleep(1)
progress['value'] = 7
app.update()
time.sleep(1)
progress['value'] = 8
app.update()
time.sleep(1)
progress['value'] = 9
app.update()
time.sleep(1)
progress['value'] = 10
app.update()
time.sleep(1)
progress['value'] = 11
app.update()
time.sleep(1)
progress['value'] = 12
app.update()
time.sleep(1)
progress['value'] = 13
app.update()
time.sleep(1)
progress['value'] = 14
app.update()
time.sleep(1)
progress['value'] = 15
app.update()
time.sleep(1)
progress['value'] = 16
app.update()
time.sleep(1)
progress['value'] = 17
app.update()
time.sleep(1)
progress['value'] = 18
app.update()
time.sleep(1)
progress['value'] = 19
app.update()
time.sleep(1)
progress['value'] = 20
app.update()
time.sleep(1)
progress['value'] = 21
app.update()
time.sleep(1)
progress['value'] = 22
app.update()
time.sleep(1)
progress['value'] = 23
app.update()
time.sleep(1)
progress['value'] = 24
app.update()
time.sleep(1)
progress['value'] = 25
app.update()
time.sleep(1)
progress['value'] = 26
app.update()
time.sleep(1)
progress['value'] = 27
app.update()
time.sleep(1)
progress['value'] = 28
app.update()
time.sleep(1)
progress['value'] = 29
app.update()
time.sleep(1)
progress['value'] = 30
app.update()
time.sleep(1)
progress['value'] = 31
app.update()
time.sleep(1)
progress['value'] = 32
app.update()
time.sleep(1)
progress['value'] = 33
app.update()
time.sleep(1)
progress['value'] = 34
app.update()
time.sleep(1)
progress['value'] = 35
app.update()
time.sleep(1)
progress['value'] = 36
app.update()
time.sleep(1)
progress['value'] = 37
app.update()
time.sleep(1)
progress['value'] = 38
app.update()
time.sleep(1)
progress['value'] = 39
app.update()
time.sleep(1)
progress['value'] = 40
app.update()
time.sleep(1)
progress['value'] = 41
app.update()
time.sleep(1)
progress['value'] = 42
app.update()
time.sleep(1)
progress['value'] = 43
app.update()
time.sleep(1)
progress['value'] = 44
app.update()
time.sleep(1)
progress['value'] = 45
app.update()
time.sleep(1)
progress['value'] = 46
app.update()
time.sleep(1)
progress['value'] = 47
app.update()
time.sleep(1)
progress['value'] = 48
app.update()
time.sleep(1)
progress['value'] = 49
app.update()
time.sleep(1)
progress['value'] = 50
app.update()
time.sleep(1)
progress['value'] = 51
app.update()
time.sleep(1)
progress['value'] = 52
app.update()
time.sleep(1)
progress['value'] = 53
app.update()
time.sleep(1)
progress['value'] = 54
app.update()
time.sleep(1)
progress['value'] = 55
app.update()
time.sleep(1)
progress['value'] = 56
app.update()
time.sleep(1)
progress['value'] = 57
app.update()
time.sleep(1)
progress['value'] = 58
app.update()
time.sleep(1)
progress['value'] = 59
app.update()
time.sleep(1)
progress['value'] = 60
app.update()
time.sleep(1)
app.after(0,my_progress)
progress.pack()
app.after(after_difference,my_progress)
app.mainloop()
解决方法
两件重要的事情:
-
time.sleep(1)
至少睡眠 一秒钟。这不是一个确切的计时器。 - 更新进度条也需要时间,这会进一步减慢该过程
在您的代码中,有如下所示的块:
progress['value'] = 1
app.update() # this takes time
time.sleep(1) # more than 1 second
将其中的60个组合起来肯定需要一分钟以上的时间。
要获得更高的精度,请使用开始时间和当前时间之间的时差并相应地设置进度条。
这是更新的代码。它每1/10秒检查一次时差并更新进度条。
def my_progress():
progress['maximum'] = 60
start = dt.datetime.now()
while True:
diff = (dt.datetime.now() - start).total_seconds() # seconds since bar start
progress['value'] = diff # can also use int(diff) to jump 1 sec
app.update()
time.sleep(0.1) # 1/10 second
if (diff > 60): # end of bar
start = dt.datetime.now() # restart progress
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