Tkinter 重塑画布不能面向对象

Question

我对 Tkinter 还很陌生，我正在尝试制作一个登录屏幕。功能是存在的，但是我希望我的画布是 200x300px，但这似乎不起作用。它返回给我一个画布，刚好适合按钮和输入字段。请帮忙！

import tkinter as tk

class Login_Screen:

def __init__(self, master):

    self.master = master

    self.canvas = tk.Canvas(self.master, width=200, height=300)

    self.frame = tk.Frame(self.canvas)

    self.input_user_log = tk.Entry(self.frame)

    self.button1 = tk.Button(self.frame, text="Log in", width=15, command=self.return_login_info)

    self.input_user_log.pack()

    self.canvas.pack()

    self.button1.pack()

    self.frame.pack()

def return_login_info(self):

    print(self.input_user_log.get())

root = tk.Tk()

app = Login_Screen(root)

root.mainloop()

Answer 1

使用geometry()上的方法master。import tkinter as tkclass Login_Screen:     def __init__(self, master):         self.master = master         self.master.geometry("300x200")         self.canvas = tk.Canvas(self.master)         self.frame = tk.Frame(self.canvas)         self.input_user_log = tk.Entry(self.frame)         self.button1 = tk.Button(self.frame, text="Log in", width=15, command=self.return_login_info)         self.input_user_log.pack()         self.canvas.pack()         self.button1.pack()         self.frame.pack()