Tkinter 中的 .grid 问题

Question

我对编码/Python 很陌生，但基本上我正在尝试使用 .grid 移动按钮和标签，但是，StartPage类中的按钮和标签不会移动到我要求的地方(甚至根本不会(。BMR类中的所有内容都运行良好(尽管您看到的职位不是最终位置，但我只是在检查(。

有什么区别？如果我在两个类中给出相同的详细信息，为什么它们不会出现在同一位置？

import tkinter as tk
class initials(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side='top', fill='both', expand= True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
for F in (StartPage, BMR):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky='nsew')
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise() 
class StartPage(tk.Frame):  #GRID WON'T WORK HOW I WANT IT TO
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = tk.Label(self, text="Start Page")
label.grid(column=3, row=3, sticky='we')
button = tk.Button(self, text="Calculate BMR", 
command=lambda: controller.show_frame(BMR))
button.grid(row=4, column=3, sticky='we')
class BMR(tk.Frame): #GRID WORKS PERFECTLY
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = tk.Label(self, text="BMR Calculator")
label.grid(column=1,row=1)
button1 = tk.Button(self, text="Back to Home", 
command=lambda: controller.show_frame(StartPage))
button1.grid(column=2, row=2)
submit = tk.Button(self, text="Calculate")
submit.grid(column=3, row=3)
var1 = tk.IntVar()
tk.Checkbutton(self, text='Male', bg='white', variable=var1).grid(column=4, row=4)
var2= tk.IntVar()
tk.Checkbutton(self, text='Female', bg='white', variable=var2).grid(column=5, row=5)    
height_inp = tk.Entry(self, width=20, bg="white").grid(column=6, row=6)
app = initials()
app.mainloop()

Answer 1

class StartPage(tk.Frame):  
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label = tk.Label(self, text="Start Page", width = 80)
# Added width property in the line above
# and changed sticky property to N
label.grid(row = 3, column=3, sticky = 'N')
label.width = 20
button = tk.Button(self, text="Calculate BMR", 
command=lambda: controller.show_frame(BMR))
button.grid(row=4, column=3)
# Removed sticky property for the button

我知道这就是您希望如何定位标签和按钮。 请看评论。您可以编辑 width 属性的值，使其适合您的框架。