如何使用Tkinter清除標籤？

Question

我正在使用標籤來顯示在我製作的Tic Tac Toe遊戲中獲勝者。但是，當標籤被不同文本覆蓋時，其下的舊文本不會被清除，只會被覆蓋。所以，一些舊文本有時會通過。有沒有一種方法可以清除標籤來完成此操作，而不需要在同一個位置製作不同的標籤？如果我嘗試在標籤上使用.destroy()方法，則會出現錯誤的窗口路徑錯誤。

這裏是我的代碼：

import tkinter as tk 


class TicTacToe(tk.Tk): 
    def __init__(self): 
     super().__init__() 
     # Vars 
     self.players = Players() 
     self.rounds_played = 0 
     self.turn = 0 
     self.hz = [0,3,6] 
     self.clicked_buttons = [] 

     # Attributes 
     self.resizable(False, False) 

     # Start 
     self.game_title = tk.Label(text="Stew's Tic Tac Toe") 
     self.name_label = tk.Label(text="Make a name\n(Press the \'Enter\' key to submit)") 
     self.name_entry = tk.Entry() 
     self.symbol_label = tk.Label(text="Pick your symbol") 
     self.symbol_buttons = [tk.Button(text="[X]", command=lambda: self.symbol_select(0)), 
           tk.Button(text="[O]", command=lambda: self.symbol_select(1))] 
     self.next = tk.Button(text="Next", command=self.next_button) 
     self.start_game = tk.Button(text="Start", command=self.start) 
     self.game_title.grid(row=0) 
     self.name_label.grid(row=1) 
     self.name_entry.grid(row=2) 
     self.name_entry.bind("<Return>", lambda x: self.set_player_name(self.players.player)) 

    def set_player_name(self, num): 
     if num == 0: 
      self.players.name = [self.name_entry.get().strip(" ")] 
      if len(self.players.name[0].strip(" ")) == 0: 
       self.players.name = ["Player 1"] 
      if self.players.name[0] == "": 
       self.players.name = ["Player 1"] 
      if self.players.name[0] == " ": 
       self.players.name = ["Player 1"] 
      self.symbol_label.grid(row=3,) 
      self.symbol_buttons[0].grid(row=4, sticky=tk.W, padx=57.5) 
      self.symbol_buttons[1].grid(row=4, sticky=tk.E, padx=57.5) 
     elif num == 1: 
      self.players.name.append(self.name_entry.get().strip(" ")) 
      if len(self.players.name) >= 3: 
       self.players.name[1] = self.players.name[2] 
       self.players.name.pop(2) 

      if len(self.players.name[0].strip(" ")) == 0: 
       self.players.name = ["Player 1"] 
      if self.players.name[1] == "": 
       self.players.name.pop(1) 
       self.players.name.append("Player 2") 
      if self.players.name[1] == " ": 
       self.players.name.pop(1) 
       self.players.name.append("Player 2") 
      if self.players.name[1] == self.players.name[0]: 
       self.players.name[0] = f"{self.players.name[0]}1" 
       self.players.name[1] = f"{self.players.name[1]}2" 
      self.start_game.grid(row=4) 

    def symbol_select(self, num): 
     if num == 0: 
      self.players.symbol = ["[X]", 
          "[O]"] 
     else: 
      self.players.symbol = ["[O]", 
          "[X]"] 
     self.next.grid(row=5) 

    def next_button(self): 
     self.players.player = 1 
     self.next.grid_forget() 
     self.name_entry.delete(0, tk.END) 
     self.symbol_label.grid_forget() 
     for x in self.symbol_buttons: 
      x.grid_forget() 

    def start(self): 
     self.game_title.grid_forget() 
     self.whos_turn = tk.Label(text=f"{self.players.name[0]}\'s Turn") 
     self.whos_turn.grid(row=0, column=1, columnspan=3) 
     self.start_game.grid_forget() 
     self.name_label.grid_forget() 
     self.name_entry.grid_forget() 
     self.game_buttons = [tk.Button(text="[ ]", command=lambda: self.move_update(0)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(1)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(2)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(3)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(4)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(5)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(6)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(7)), 
          tk.Button(text="[ ]", command=lambda: self.move_update(8))] 
     num = 0 
     for r in range(0,3): 
      for c in range(0,3): 
       self.game_buttons[num].grid(row=(r%3 + 1), column=(c%3 + 1)) 
       num = num + 1 
     self.rounds = tk.Label(text=f"Rounds Played: {self.rounds_played}") 
     self.stats_title = tk.Label(text="Player\'s Stats") 
     self.player_stats = [tk.Label(text=f"{self.players.name[0]}\'s Wins: {self.players.wins[0]}"), 
          tk.Label(text=f"{self.players.name[1]}\'s Wins: {self.players.wins[1]}")] 
     self.rounds.grid(row=5, column=1, columnspan=3) 
     self.stats_title.grid(row=0, column=0) 
     self.player_stats[0].grid(row=1, column=0) 
     self.player_stats[1].grid(row=2, column=0) 

    def move_update(self, num): 
     if num not in self.clicked_buttons: 
      self.clicked_buttons.append(num) 
      self.players.turn = self.players.turn + 1 
      if self.players.turn%2 == 1: 
       self.game_buttons[num].config(text=self.players.symbol[0], relief=tk.SUNKEN) 
       self.whos_turn.config(text=f"{self.players.name[1]}\'s Turn") 
      elif self.players.turn%2 == 0: 
       self.game_buttons[num].config(text=self.players.symbol[1], relief=tk.SUNKEN) 
       self.whos_turn.config(text=f"{self.players.name[0]}\'s Turn") 
     if self.players.turn != 9: 
      self.check_for_winner() 
     if self.players.turn == 9: 
      if self.check_for_winner() != 1: 
       self.round_end(0) 

    def check_for_winner(self): 
     # Check Which Symbol Won 
     for n in range(0, 2): 
      # Check if Winner (Vertical) 
      for x in range(0, 3): 
       if self.game_buttons[x]["text"] == self.players.symbol[n] and self.game_buttons[x + 3]["text"] == self.players.symbol[ 
        n]: 
        if self.game_buttons[x + 6]["text"] == self.players.symbol[n]: 
         self.round_end(n + 1) 
         return 1 
      # Check if Winner (Horizontal) 
      for x in range(0, 9): 
       if x in self.hz and self.game_buttons[x]["text"] == self.players.symbol[n]: 
        if self.game_buttons[x + 1]["text"] == self.players.symbol[n] and self.game_buttons[x + 2]["text"] == self.players.symbol[n]: 
         self.round_end(n + 1) 
         return 1 
      # Check if Winner (Left Diagonal) 
      if self.game_buttons[0]["text"] == self.players.symbol[n] and self.game_buttons[4]["text"] == self.players.symbol[n]: 
       if self.game_buttons[8]["text"] == self.players.symbol[n]: 
        self.round_end(n + 1) 
        return 1 
      # Check if Winner (Right Diagonal) 
      if self.game_buttons[2]["text"] == self.players.symbol[n] and self.game_buttons[4]["text"] == self.players.symbol[n]: 
       if self.game_buttons[6]["text"] == self.players.symbol[n]: 
        self.round_end(n + 1) 
        return 1 

    def round_end(self ,num): 
     for x in self.game_buttons: 
      x.config(relief=tk.SUNKEN, state=tk.DISABLED) 
     self.rounds_played = self.rounds_played + 1 
     self.rounds.configure(text=f"Rounds Played: {self.rounds_played}") 
     self.round_winner = tk.Label() 
     self.play_again = tk.Button(text="Play Again?", command=self.new_game) 
     self.play_again.grid(row=6, column=1, columnspan=3) 
     if num == 0: 
      self.round_winner.grid(row=4, column=1, columnspan=3) 
      self.round_winner.destroy() 
      self.round_winner.grid(row=4, column=1, columnspan=3) 
      self.round_winner.config(text="It was a Tie!") 
     elif num == 1: 
      self.round_winner.grid(row=4, column=1, columnspan=3) 
      self.round_winner.config(text=f"{self.players.name[0]} Wins!") 
      self.players.wins = [self.players.wins[0] + 1, self.players.wins[1]] 
      self.player_stats[0].config(text=f"{self.players.name[0]}\'s Wins: {self.players.wins[0]}") 
     elif num == 2: 
      self.round_winner.grid(row=4, column=1, columnspan=3) 
      self.round_winner.destroy() 
      self.round_winner.grid(row=4, column=1, columnspan=3) 
      self.round_winner.config(text=f"{self.players.name[1]} Wins!") 
      self.players.wins = [self.players.wins[0], self.players.wins[1] + 1] 
      self.player_stats[1].config(text=f"{self.players.name[1]}\'s Wins: {self.players.wins[1]}") 

    def new_game(self): 
     self.players.turn = 0 
     for x in self.game_buttons: 
      x.config(state=tk.ACTIVE, text="[ ]", relief=tk.RAISED) 
     self.clicked_buttons = [] 


class Players: 
    def __init__(self): 
     super().__init__() 
     self.name = [] 
     self.symbol = [] 
     self.wins = [0, 0] 
     self.player = 0 
     self.turn = 0 



game = TicTacToe() 
game.mainloop() 

相關的部分是（行196 161-164）

self.round_winner.grid(row=4, column=1, columnspan=3) 
self.round_winner.destroy() 
self.round_winner.grid(row=4, column=1, columnspan=3) 
self.round_winner.config(text="It was a Tie!") 

Answer 1

你只需要更新標籤的文本;沒有必要爲每個遊戲重新創建和重新標記標籤。
得分也需要更新。
self.update()可能會矯枉過正;你可以用self.update_idletasks()替換它，或者完全刪除它。

def round_end(self ,num): 
    for x in self.game_buttons: 
     x.config(relief=tk.SUNKEN, state=tk.DISABLED) 
    self.rounds_played = self.rounds_played + 1 
    self.rounds.configure(text=f"Rounds Played: {self.rounds_played}") 
    self.round_winner = tk.Label() 
    self.play_again = tk.Button(text="Play Again?", command=self.new_game) 
    self.play_again.grid(row=6, column=1, columnspan=3) 

    if num == 0: 
     self.round_winner.config(text="It was a Tie!") 
     self.update() 

    elif num == 1: 
     self.players.wins[0] += 1 
     self.player_stats[0].config(text=f"{self.players.name[0]}\'s Wins: {self.players.wins[0]}") 
     self.update() 

    elif num == 2: 
     self.round_winner.config(text=f"{self.players.name[1]} Wins!") 
     self.players.wins[1] += 1 
     self.player_stats[1].config(text=f"{self.players.name[1]}\'s Wins: {self.players.wins[1]}") 
     self.update()