如何在 tkinter 中单击按钮后出现按钮？

Question

我在这里遇到这个问题，我希望在用户单击主按钮 (b0) 后出现一个按钮（代码中的 b1）。

from tkinter import *
from tkinter import filedialog
import tkinter.messagebox
import os

def openword():
    my_program = filedialog.askopenfilename()
    os.system('"%s"' % my_program)

def btn_clicked():
    tkinter.messagebox.showinfo("Login","Login Success, Welcome!")

window = Tk()

window.geometry("1000x600")
window.configure(bg = "#293335")
canvas = Canvas(
    window,
    bg = "#293335",
    height = 600,
    width = 1000,
    bd = 0,
    highlightthickness = 0,
    relief = "ridge")
canvas.place(x = 0, y = 0)

background_img = PhotoImage(file = f"background.png")
background = canvas.create_image(
    508.5, 228.0,
    image=background_img)

entry0_img = PhotoImage(file = f"img_textBox0.png")
entry0_bg = canvas.create_image(
    166.0, 367.0,
    image = entry0_img)

entry0 = Entry(
    bd = 0,
    bg = "#ffffff",
    highlightthickness = 0)

entry0.place(
    x = 22, y = 351,
    width = 288,
    height = 30)

entry1_img = PhotoImage(file = f"img_textBox1.png")
entry1_bg = canvas.create_image(
    166.0, 456.0,
    image = entry1_img)

entry1 = Entry(
    bd = 0,
    bg = "#ffffff",
    highlightthickness = 0)

entry1.place(
    x = 22, y = 440,
    width = 288,
    height = 30)

img0 = PhotoImage(file = f"img0.png")
b0 = Button(
    image = img0,
    borderwidth = 0,
    highlightthickness = 0,
    command = btn_clicked,
    relief = "flat")

b0.place(
    x = 28, y = 500,
    width = 102,
    height = 38)

img1 = PhotoImage(file = f"img1.png")
b1 = Button(
    image = img1,
    borderwidth = 0,
    highlightthickness = 0,
    command = openword,
    relief = "flat")

b1.place(
    x = 766, y = 505,
    width = 213,
    height = 72)

window.resizable(False, False)
window.mainloop()

代码运行良好，但两个按钮同时出现。 我需要在用户按下b0 后出现b1。

Answer 1

就像 acw1668 建议的那样，将按钮放在单击另一个按钮时调用的函数中。这是一个例子：

import tkinter as tk
import tkinter.messagebox

def btn_clicked():
    tkinter.messagebox.showinfo("Login","Login Success, Welcome!")
    b2 = tk.Button(
        borderwidth = 0,
        highlightthickness = 0,
        command = btn_clicked,
        relief = "flat"
    )
    b2.place(
        x = 200, y = 200,
        width = 213,
        height = 72
    )

window = tk.Tk()

window.geometry("1000x600")
window.configure(bg = "#293335")

b1 = tk.Button(
    borderwidth = 0,
    highlightthickness = 0,
    command = btn_clicked,
    relief = "flat"
)

b1.place(
    x = 5, y = 5,
    width = 213,
    height = 72
)

window.resizable(False, False)
window.mainloop()