python - tkinter 窗口行为怪异并停止响应

Question

我开发了一个代码，可以让我设置一个可以播放音效的闹钟：

import time
import tkinter as tk
import playsound

window = tk.Tk()
window.title('Alarm clock')

#where the problem lies
def submit():
    hr=int(txtHr.get('1.0',tk.END))
    minute=int(txtMin.get('1.0',tk.END))
    sec=int(txtSec.get('1.0',tk.END))
    while True:
        time2=time.localtime()
        nowHr=time2.tm_hour
        nowMin=time2.tm_min
        nowSec=time2.tm_sec
        if nowHr==hr:
            if nowMin ==minute:
                if nowSec==sec:
                    playsound.playsound('D:/Python/Project/Alarm.mp3')
                    break
    
window.columnconfigure([0,2],minsize=70)

lbHr=tk.Label(text='Hour',font='italic')
lbHr.grid(row=0,column=0)

lbMin=tk.Label(text='Min',font='italic')
lbMin.grid(row=0,column=1)

lbSec=tk.Label(text='Sec',font='italic')
lbSec.grid(row=0,column=2)

txtHr=tk.Text(fg='white',bg='blue',width='2',height='1')
txtHr.grid(row=1,column=0,pady=5)

txtMin=tk.Text(fg='white',bg='blue',width='2',height='1')
txtMin.grid(row=1,column=1)

txtSec=tk.Text(fg='white',bg='blue',width='2',height='1')
txtSec.grid(row=1,column=2)

lbHow=tk.Label(text='The clock first show you the current time, \nnow type in the time of the alarm.')
lbHow.grid(row=2,columnspan=3)

butStart=tk.Button(text='Set alarm clock',command=submit)
butStart.grid(row=3,columnspan=3,pady=5)

t=time.localtime()
txtHr.insert('1.0',str(t.tm_hour))
txtMin.insert('1.0',str(t.tm_min))
txtSec.insert('1.0',str(t.tm_sec))

window.mainloop()

当我设置闹钟并且窗口超过 5 秒时，它停止响应：

令人惊讶的是，它仍然有效，警报仍然响起。当然，没有响应的窗口并不理想，那么我该如何解决呢？我应该使用datetime模块，甚至有什么区别吗？

Answer 1

您可以使用threading模块并启动while loop新线程：

import time,threading
import tkinter as tk
import playsound

window=tk.Tk()
window.title('Alarm clock')

#where the problem lies
def submit():
    hr=int(txtHr.get('1.0',tk.END))
    minute=int(txtMin.get('1.0',tk.END))
    sec=int(txtSec.get('1.0',tk.END))
    while True:
        time2=time.localtime()
        nowHr=time2.tm_hour
        nowMin=time2.tm_min
        nowSec=time2.tm_sec
        if nowHr==hr:
            if nowMin ==minute:
                if nowSec==sec:
                    playsound.playsound('D:/Python/Project/Alarm.mp3')
                    break
    

window.columnconfigure([0,2],minsize=70)

lbHr=tk.Label(text='Hour',font='italic')
lbHr.grid(row=0,column=0)

lbMin=tk.Label(text='Min',font='italic')
lbMin.grid(row=0,column=1)

lbSec=tk.Label(text='Sec',font='italic')
lbSec.grid(row=0,column=2)

txtHr=tk.Text(fg='white',bg='blue',width='2',height='1')
txtHr.grid(row=1,column=0,pady=5)

txtMin=tk.Text(fg='white',bg='blue',width='2',height='1')
txtMin.grid(row=1,column=1)

txtSec=tk.Text(fg='white',bg='blue',width='2',height='1')
txtSec.grid(row=1,column=2)

lbHow=tk.Label(text='The clock first show you the current time, \nnow type in the time of the alarm.')
lbHow.grid(row=2,columnspan=3)

butStart=tk.Button(text='Set alarm clock',command=lambda: [threading.Thread(target=submit).start()])
butStart.grid(row=3,columnspan=3,pady=5)


t=time.localtime()
txtHr.insert('1.0',str(t.tm_hour))
txtMin.insert('1.0',str(t.tm_min))
txtSec.insert('1.0',str(t.tm_sec))


window.mainloop()