Python中文网 - 问答频道, 解决您学习工作中的Python难题和Bug
Python常见问题
我正在尝试用python创建一个计时器，并使用tkinter将其放到GUI应用程序中。现在我已经有了一个算法，可以根据用户的输入慢慢倒计时。虽然我已经这样做了，但GUI应用程序会冻结到0，然后显示完成时间。如果有人能让我知道为什么它不能每秒显示时间的变化，我将不胜感激。下面是我的代码
import tkinter as tk
import tkinter.font as tkFont
import time
def navbar(self,page):
page = page
timerBtn = tk.Button(self.master, text = 'Timer', command = lambda: timers(self,page))
timerBtn.place(x=0,y=550,width = 333,height = 50)
ClockBtn = tk.Button(self.master, text = 'Clock', command = lambda: clocks(self,page))
ClockBtn.place(x=333,y=550, width = 333, height = 50)
stopWatchBtn = tk.Button(self.master, text = 'Stop Watch', command = lambda: stopWatchs(self,page))
stopWatchBtn.place(x=666,y=550,width = 333, height = 50)
def timers(self,page):
if page != 'Timer':
self.master.destroy()
root = tk.Tk()
app = timer(root)
def clocks(self,page):
if page != 'Clock':
self.master.destroy()
root = tk.Tk()
app = clock(root)
def stopWatchs(self,page):
if page != 'StopWatch':
self.master.destroy()
root = tk.Tk()
app = stopWatch(root)
class timer():
def __init__(self, master):
self.master = master
self.master.title("Clock Clone")
self.master.geometry("999x600")
self.place()
def place(self):
self.hoursLabel = tk.Label(self.master, text = 'Hours')
self.hoursLabel.place(x=220,y=200)
self.hoursEntry = tk.Entry(self.master)
self.hoursEntry.place(x=200,y= 200,width = 20)
self.hoursUpArrow = tk.Button(self.master, text = "\N{UPWARDS BLACK ARROW}",command = lambda: self.change('hours', 'Up'))
self.hoursUpArrow.place(x=201, y= 170)
self.hoursDownArrow = tk.Button(self.master, text = "\N{DOWNWARDS BLACK ARROW}",command = lambda: self.change('hours', 'Down'))
self.hoursDownArrow.place(x=201, y= 225)
self.minsLabel = tk.Label(self.master, text = 'Minutes')
self.minsLabel.place(x=520,y=200)
self.minsEntry = tk.Entry(self.master)
self.minsEntry.place(x=500,y= 200, width = 20)
self.minsUpArrow = tk.Button(self.master, text = "\N{UPWARDS BLACK ARROW}",command = lambda: self.change('mins', 'Up'))
self.minsUpArrow.place(x=501, y= 170)
self.minsDownArrow = tk.Button(self.master, text = "\N{DOWNWARDS BLACK ARROW}",command = lambda: self.change('mins', 'Down'))
self.minsDownArrow.place(x=501, y= 225)
self.secondsLabel = tk.Label(self.master, text = 'Seconds')
self.secondsLabel.place(x=820,y=200)
self.secondsEntry = tk.Entry(self.master)
self.secondsEntry.place(x=800,y= 200, width = 20)
self.secondsUpArrow = tk.Button(self.master, text = "\N{UPWARDS BLACK ARROW}",command = lambda: self.change('sec', 'Up'))
self.secondsUpArrow.place(x=801, y= 170)
self.secondsDownArrow = tk.Button(self.master, text = "\N{DOWNWARDS BLACK ARROW}",command = lambda: self.change('sec', 'Down'))
self.secondsDownArrow.place(x=801, y= 225)
self.cancelButton = tk.Button(self.master, text = 'Cancel', command = self.cancel)
self.cancelButton.place(x=150,y=400)
self.startButton = tk.Button(self.master, text= 'Start', command = self.start)
self.startButton.place(x=750,y=400)
navbar(self,'Timer')
def change(self,time, change):
changeable = 0
if time == 'hours':
changeable = self.hoursEntry.get()
elif time == 'mins':
changeable = self.minsEntry.get()
elif time == 'sec':
changeable = self.secondsEntry.get()
if changeable == '':
changeable = 0
else:
changeable = int(changeable)
if time == 'hours':
if change == 'Up':
changeable += 1
else:
if changeable > 0:
changeable -= 1
self.hoursEntry.delete(0,tk.END)
self.hoursEntry.insert(0,str(changeable))
elif time == 'mins':
if change == 'Up' and changeable < 60:
changeable += 1
else:
if changeable > 0:
changeable -= 1
self.minsEntry.delete(0,tk.END)
self.minsEntry.insert(0,str(changeable))
elif time == 'sec':
if change == 'Up' and changeable < 60:
changeable += 1
else:
if changeable > 0:
changeable -= 1
self.secondsEntry.delete(0,tk.END)
self.secondsEntry.insert(0,str(changeable))
def cancel(self):
self.place()
self.TimeLabel.place_forget()
def start(self):
self.hours = self.hoursEntry.get()
self.mins = self.minsEntry.get()
self.seconds = self.secondsEntry.get()
if self.hours == '':
self.hours = '00'
if self.mins == '':
self.mins = '00'
if self.seconds == '':
self.seconds = '00'
self.hours = int(self.hours)
self.mins = int(self.mins)
self.seconds = int(self.seconds)
self.hoursLabel.place_forget()
self.hoursEntry.place_forget()
self.hoursUpArrow.place_forget()
self.hoursDownArrow.place_forget()
self.minsLabel.place_forget()
self.minsEntry.place_forget()
self.minsUpArrow.place_forget()
self.minsDownArrow.place_forget()
self.secondsLabel.place_forget()
self.secondsEntry.place_forget()
self.secondsUpArrow.place_forget()
self.secondsDownArrow.place_forget()
fontStyle = tkFont.Font(family="Lucida Grande", size=50)
Time = str(self.hours) + ':' + str(self.mins) + ':' + str(self.seconds)
self.TimeLabel = tk.Label(self.master, text = Time, font = fontStyle)
self.TimeLabel.place(x=380, y= 200)
self.on = True
self.timer(Time)
def timer(self,Time):
time.sleep(1)
self.seconds -= 1
if self.seconds <= 0:
if self.mins > 0:
self.seconds = 60
self.mins -= 1
else:
if self.hours >= 1:
self.mins = 59
self.seconds = 60
self.hours -= 1
else:
self.on = False
Time = str(self.hours) + ':' + str(self.mins) + ':' + str(self.seconds)
self.TimeLabel.config(text = Time)
if self.on == True:
self.timer(Time)
class clock():
def __init__(self,master):
self.master = master
self.master.title("Clock Clone")
self.master.geometry("999x600")
navbar(self,'Clock')
class stopWatch():
def __init__(self,master):
self.master = master
self.master.title("Clock Clone")
self.master.geometry("999x600")
navbar(self,'StopWatch')
root = tk.Tk()
app = timer(root)
root.mainloop()
Tags： textselfmasterifdefpageplacebutton
热门问题
- 如何替换子字符串，但前提是它正好出现在两个单词之间
- 如何替换字典中所有出现的指定字符
- 如何替换字典中所有键的第一个字符？
- 如何替换字典所有键中的子字符串
- 如何替换字符串python中的变量值？
- 如何替换字符串Python中的第二次迭代
- 如何替换字符串y Python中不等于字符串x的所有内容？
- 如何替换字符串中出现的第n个单词？
- 如何替换字符串中单词的一部分
- 如何替换字符串中同时出现的2个或更多特殊字符或下划线
- 如何替换字符串中指定位置（索引）的字符？
- 如何替换字符串中某个字符的所有匹配项？
- 如何替换字符串中的
- 如何替换字符串中的一个字符
- 如何替换字符串中的主题（固定位置）
- 如何替换字符串中的分隔逗号？
- 如何替换字符串中的列名（python）？
- 如何替换字符串中的制表符？
- 如何替换字符串中的单个单词而不是用相同的字符替换其他单词
- 如何替换字符串中的单个字符？
热门文章
- Python覆盖写入文件
- 怎样创建一个 Python 列表？
- Python3 List append()方法使用
- 派森语言
- Python List pop()方法
- Python Django Web典型模块开发实战
- Python input() 函数
- Python3 列表(list) clear()方法
- Python游戏编程入门
- 如何创建一个空的set?
- python如何定义(创建)一个字符串
- Python标准库 [The Python Standard Library by Ex
- Python网络数据爬取及分析从入门到精通（分析篇）
- Python3 for 循环语句
- Python List insert() 方法
- Python 字典(Dictionary) update()方法
- Python编程无师自通 专业程序员的养成
- Python3 List count()方法
- Python 网络爬虫实战 [Web Crawler With Python]
- Python Cookbook（第2版）中文版
下面是如何使用我在评论中提到的^{} 小部件方法，让GUI应用程序的
Timer类部分正常工作，而不会冻结注意：我还重新格式化了大量代码，使其更具可读性，并更改了类名的拼写，以符合PEP 8 - Style Guide for Python Code准则和（相当重要的）naming conventions。我强烈建议你自己阅读并开始关注它们使其工作的代码更改主要是在
Timer类start()方法中，现在没有人调用我添加的名为countdown()的新方法，它取代了您调用的timer()。我还更改了cancel()方法以使其工作下面是它运行的屏幕截图：
相关问题 更多 >
编程相关推荐