绑定多个相同名称的标签

Question

我想允许用户使用下面的代码创建尽可能多的标签:

def new_line(event):
global Row_n
Row_n = Row_n + 1
Choose= tk.Label(frame, text="Choose option", background = "white",font = ("Helvetica",13),fg = "blue")
Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
return Row_n
root.bind('<Return>',lambda event:new_line(event))

这样，通过按"enter"键，用户可以创建任意多个"选择"键。标签随他们的便。然后我想让第二个标签在用户每次点击"选择"时出现标签。所以我使用下面的代码:

def second_l(event):
Row_n = Row_n+1
second_label = tk.Label(frame, text="Second label")
Choose.bind('<Button-1>',lambda event:second_l(event))

当我尝试运行这个时，我得到以下错误:

不能调用"bind"命令:应用程序已被销毁

如果我加上"Choose"在"new_line"函数the "second_l"函数只对该标签起作用。它不适用于"new_line"生成的标签。函数。

整个代码:

import tkinter as tk#to create the gui
from tkinter import filedialog, Text #filedialog to pick apps and Text to display text
import os #Allows us to run apps
root = tk.Tk() 
frame = tk.Frame(root,bg="white")
frame.place(relwidth=0.8,relheight=0.7,relx=0.1,rely=0.1)
Row_n=0
def new_line(event):
global Row_n
Row_n = Row_n + 1
Choose= tk.Label(frame, text="Choose option", background = "white",font = ("Helvetica",13),fg = "blue")
Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
return Row_n
root.bind('<Return>',lambda event:new_line(event))
def second_l(event):
global Row_n
Row_n = Row_n+1
second_label = tk.Label(frame, text="Second label")
second_label.grid(row = Row_n, column = 0, sticky = 'nsew')
Choose.bind('<Button-1>',lambda event:second_l(event))
root.mainloop()

Answer 1

我无法理解为什么会出现这个错误"无法调用" bind ";command"但我想，我理解你的问题

你可以试试:-

import tkinter as tk#to create the gui
from tkinter import filedialog, Text #filedialog to pick apps and Text to display text
import os #Allows us to run apps
root = tk.Tk() 
frame = tk.Frame(root,bg="white")
frame.place(relwidth=0.8,relheight=0.7,relx=0.1,rely=0.1)
Row_n=0
Choose= tk.Label(frame, text="", background = "white",font = ("Helvetica",13),fg = "blue")

def new_line(event):
global Row_n
Row_n = Row_n + 1
Choose.config(text="Choose option")
Choose.grid(row = Row_n, column = 0, sticky = 'nsew')
return Row_n
root.bind('<Return>',lambda event:new_line(event))
def second_l(event):
global Row_n
Row_n = Row_n+1
second_label = tk.Label(frame, text="Second label")
second_label.grid(row = Row_n, column = 0, sticky = 'nsew')
Choose.bind('<Button-1>',lambda event:second_l(event))
root.mainloop()