如何在 tkinter 中为我的重试按钮添加功能？

Question

我编写了一个生成两个数字并要求用户计算其和并输入结果的代码。程序运行良好，但我想要的是添加一个按钮，再次要求用户输入结果并进行验证。我面临的问题是该条目未被清除，另一个 window 在具有相同条目的原始 window 下面打开。

import tkinter as tk
import random
window = tk.Tk()
content = tk.StringVar()
def startgame():
    number1 = random.randint(10, 51)
    number2 = random.randint(10, 51)
    sum_of_num = number1 + number2

    def checkresult():
        global content
        i = int(content.get())
        if i == sum_of_num:
            label = tk.Label(window, text = "Correct Result", fg = "blue").pack()
        else:
            label = tk.Label(window, text = "Incorrect result!! Try again.", fg = "red").pack()


    window.title("Number Guessing Game")
    label = tk.Label(window, text = "Let's begin the Quiz", fg = "blue").pack()
    label = tk.Label(window, text = "---------------------", fg = "blue").pack()
    label = tk.Label(window, text = "Given two numbers", fg = "blue").pack()
    label = tk.Label(window, text = number1, fg = "blue").pack()
    label = tk.Label(window, text = number2, fg = "blue").pack()
    label = tk.Label(window, text = "Add these two numbers and enter the result", fg = "blue").pack()

    sum_of_numbers = tk.Entry(window, textvariable = content)
    sum_of_numbers.pack()
    sum_of_numbers.focus_set()

    button_to_check_result = tk.Button(window, text="Check whether answer is correct", fg = "red", command = checkresult).pack()


startgame()    
button_to_try_again = tk.Button(window, text="Try Again !!", fg = "red", command = startgame).pack()
window.mainloop()

我希望在清除输入后再次出现相同的 window。

Answer 1

将整个段定义为一个函数：

label = tk.Label(window, text = "Let's begin the Quiz", fg = "blue").pack()
label = tk.Label(window, text = "---------------------", fg = "blue").pack()
label = tk.Label(window, text = "Given two numbers", fg = "blue").pack()
label = tk.Label(window, text = number1, fg = "blue").pack()
label = tk.Label(window, text = number2, fg = "blue").pack()
label = tk.Label(window, text = "Add these two numbers and enter the result", fg = "blue").pack()

然后将该函数绑定到您计划实现的 'Reset' 按钮。或者，如果您想在每次用户按下 'Check' 按钮时重置，那么您可以调用 checkresult().

中的函数

基本上您要做的是在现有标签上显示新标签。

Answer 2

首先我会定义

text_number1 = tk.StringVar()
text_number2 = tk.StringVar()
sum_of_num = 0

然后我将开始游戏功能更改为

def startgame():
    global sum_of_num
    number1 = random.randint(10, 51)
    text_number1.set(str(number1))
    number2 = random.randint(10, 51)
    text_number2.set(str(number2))
    sum_of_num = number1 + number2

并相应地标记

label_num1 = tk.Label(window, textvar = text_number1, fg = "blue").pack() 
label_num2 = tk.Label(window, textvar = text_number2, fg = "blue").pack()

接下来您需要的是重置按钮

button_to_check_reset = tk.Button(window, text="Reset your question", fg = "red", command = new_question).pack()

最后但并非最不重要的 new_question 功能

def new_question()
    startgame()
    sum_of_numbers.delete(0, 'end')

这是最低限度。

但是如果你想要一个不会出现和过时标签的程序，你需要再添加一个 stringvar 来初始化，例如

answer_string = StringVar()
answer_string.set("Waiting for your answer")

比将 anwer 标签放在其他标签之后

answer_lable = tk.Label(window, textvar = answer_string, fg = "blue").pack()

那你需要改造检查结果功能

def checkresult():
        i = int(content.get())
        if i == sum_of_num:
            answer_lable['fg'] ="green"
            answer_string.set("Correct, that was not hard right?")
        else:
            answer_lable['fg'] ="red"
            answer_string.set("Wrong, you moron")

并对新问题函数做一点修改：

def new_question()
    startgame()
    sum_of_numbers.delete(0, 'end')
    answer_lable['fg'] ="blue"
    answer_string.set("Waiting for your answer...")

希望对您有所帮助，祝您好运:)

Answer 3

为了清除window，您需要将所有标签打包到一个框架中。为此，您需要先从 tkinter 导入 ttk：

from tkinter import ttk
fr = ttk.Frame()

现在，所有变量的主值都需要从 'window' 更改为 'fr'。但作为更简单的方法，我所做的是使用变量 'window' 作为框架。所以，

root= tk.Tk()
window = ttk.Frame(root)

现在，要清除框架，您可以使用以下任一命令：

window.pack_forget()
window.destroy()

最终修改后的代码如下：

import tkinter as tk
import random
from tkinter import ttk
root = tk.Tk()
content = tk.StringVar()
global window
window = ttk.Frame(root)

def startgame():
    global window
    window.pack_forget()
    window = ttk.Frame(root)
    number1 = random.randint(10, 51)
    number2 = random.randint(10, 51)
    sum_of_num = number1 + number2

    def checkresult():
        global content
        i = int(content.get())
        if i == sum_of_num:
            label = tk.Label(window, text = "Correct Result", fg = "blue").pack()
        else:
            label = tk.Label(window, text = "Incorrect result!! Try again.", fg = "red").pack()


    root.title("Number Guessing Game")
    label = tk.Label(window, text = "Let's begin the Quiz", fg = "blue").pack()
    label = tk.Label(window, text = "---------------------", fg = "blue").pack()
    label = tk.Label(window, text = "Given two numbers", fg = "blue").pack()
    label = tk.Label(window, text = number1, fg = "blue").pack()
    label = tk.Label(window, text = number2, fg = "blue").pack()
    label = tk.Label(window, text = "Add these two numbers and enter the result", fg = "blue").pack()

    sum_of_numbers = tk.Entry(window, textvariable = content)
    sum_of_numbers.pack()
    sum_of_numbers.focus_set()

    button_to_check_result = tk.Button(window, text="Check whether answer is correct", fg = "red", command = checkresult).pack()
    window.pack()

startgame()    
button_to_try_again = tk.Button(root, text="Try Again !!", fg = "red", command = startgame).pack()
window.mainloop()

如何在 tkinter 中为我的重试按钮添加功能？

How to add functionality to my try again button in tkinter?

python

tkinter

tkinter-entry