问题：_tkinter.TclError：无法调用“标签”命令：应用程序已被销毁

Question

我做了一个关于猜数字的游戏。经过多次尝试，仍然无法改变一个问题。 代码如下：

#

#
import tkinter
import random
import pygame

#
pygame.init()

#
root = tkinter.Tk()

#
bg = tkinter.Canvas(root, width=1000, height=750)
bg.pack()
bg_p = tkinter.PhotoImage(file="bg.png")
bg.create_image(500, 375, image=bg_p)

#
bgm = pygame.mixer.Sound("bgm.mp3")
bgm.play(-1)

#
low = 0
high = 101

#
random.randrange(low, high)

#
def onclick():

    #
    global low, high

    #
    guess = int(input("Guess a number: "))

    #
    if guess == answer:

        #
        bg = tkinter.Canvas(root, width=1000, height=750)
        bg.pack()
        bg_p = tkinter.PhotoImage(file="bingo.png")
        bg.create_image(500, 375, image=bg_p)

        #
        low = guess
        high = guess

        #
        bingo = pygame.mixer.Sound("bingo.mp3")
        bingo.play(0)

    #
    elif guess > answer:

        #
        bg = tkinter.Canvas(root, width=1000, height=750)
        bg.pack()
        bg_p = tkinter.PhotoImage(file="too_high.png")
        bg.create_image(500, 375, image=bg_p)

        #
        high = guess

        #
        lol = pygame.mixer.Sound("lol.mp3")
        lol.play(0)

    #
    else:

        #
        bg = tkinter.Canvas(root, width=1000, height=750)
        bg.pack()
        bg_p = tkinter.PhotoImage(file="too_low.png")
        bg.create_image(500, 375, image=bg_p)

        #
        low = guess

        #
        lol = pygame.mixer.Sound("lol.mp3")
        lol.play(0)

#
while True:

    #
    for event in pygame.event.get():

        #
        if event.type == pygame.QUIT:

            #
            pygame.quit()
            exit()

        #
        if event.type == pygame.MOUSEBUTTONDOWN:

            #
            onclick()

    #
    try:

        #
        l1.destroy()
        l2.destroy()
    
    #
    except:

        #
        pass

    #
    finally:

        #
        l1 = tkinter.Label(root, text=str(low), font=("Arial", 60), bg="white")
        l1.place(x=280, y=570)
        l2 = tkinter.Label(root, text=str(high), font=("Arial", 60), bg="white")
        l2.place(x=630, y=570)

    #
    root.mainloop()  

执行程序后，返回_tkinter.TclError：无法调用“label”命令：应用程序已被销毁。 无论我把 mainloop() 放在哪里，它都不起作用。 为什么？

我到处都放了mainloop()，但还是不行。

Answer 1

你混合了

pygame

和

tkinter

，但看起来一团糟。

您尝试使用

pygame.event

但没有创建

pygame window

- 因此系统不会将事件发送到

pygame

。当您单击

pygame.MOUSEBUTTONDOWN

时，它不会生成

tkinter window

，因为只有当您单击

pygame window

时，它才会生成它。所以它无法得到

pygame.QUIT

和

pygame.MOUSEBUTTONDOWN

。坦率地说，如果您仅使用

pygame

来播放声音，则不需要 pygame 循环。

如果您创建了

tkinter window

那么您应该使用

tkinter event

。这意味着当您点击按钮时，使用

tkinter.Button(..., command=on_click)

来执行功能。或者，当您单击

root.bind('<Button-1>', on_click)

 中的任何位置时，您必须 

tkinter window

才能执行功能

---

这是我的版本 - 但我没有测试如何工作

pygame.mixer

因为此时我的 Linux 上出现音频问题。

import tkinter
import random
import pygame

# --- functions ---

def on_click(event=None): # default value for event because `command=` doesn't send event
    global low, high

    guess = int(entry.get())  # entry needs `.get()` to get value

    if guess == answer:
        bg.itemconfig(image_id, image=bg_p_bingo)  # replace image in PhotoImage

        low = guess
        high = guess        
        label_low['text'] = str(low)    # replace text in Label
        label_high['text'] = str(high)  # replace text in Label
        
        #bingo = pygame.mixer.Sound("bingo.mp3")
        #bingo.play(0)

    elif guess > answer:
        bg.itemconfig(image_id, image=bg_p_high)  # replace image in PhotoImage

        high = guess
        label_high['text'] = str(high)  # replace text in Label

        #lol = pygame.mixer.Sound("lol.mp3")
        #lol.play(0)
    else:
        bg.itemconfig(image_id, image=bg_p_low)    # replace image in PhotoImage

        low = guess
        label_low['text'] = str(low)    # replace text in Label

        #lol = pygame.mixer.Sound("lol.mp3")
        #lol.play(0)
    
# --- main ---

low = 0
high = 101

# --- 

answer = random.randrange(low, high)

#pygame.mixer.init()

root = tkinter.Tk()

label = tkinter.Label(root, text="Guess a number: ")
label.pack(padx=5, pady=5)

entry = tkinter.Entry(root)
entry.pack(padx=5, pady=5)

button = tkinter.Button(root, text='CHECK', command=on_click)
button.pack(padx=5, pady=5)

entry.bind('<Return>', on_click)  # run function on pressing ENTER - it sends `event` to function

bg = tkinter.Canvas(root, width=300, height=300)
bg.pack()

bg_p = tkinter.PhotoImage(file="bg.png")
bg_p_bingo = tkinter.PhotoImage(file="bingo.png")
bg_p_low   = tkinter.PhotoImage(file="too_low.png")
bg_p_high  = tkinter.PhotoImage(file="too_high.png")

image_id = bg.create_image(150, 150, image=bg_p, anchor='center')

frame = tkinter.Frame(root)  # create Frame to put widgets in one row
frame.pack(fill='both', expand=True)

label_low = tkinter.Label(frame, text=f'{low}',  font=("Arial", 30), bg="white", width=3)
label_low.pack(side='left', padx=5, pady=5, fill='x', expand=True)

label_high = tkinter.Label(frame, text=f'{high}', font=("Arial", 30), bg="white", width=3)
label_high.pack(side='right', padx=5, pady=5, fill='x', expand=True)

#bgm = pygame.mixer.Sound("bgm.mp3")
#bgm.play(-1)

root.mainloop()  

pygame.mixer.quit()