如何在Tkinter中动态删除复选框? [英] How to delete checkboxes dynamically in tkinter?

问题描述

我正在使用 tkinter 制作一种待办事项应用程序.为此，我想动态生成复选框，并且已经使用函数成功完成了此操作，但是当用户按下清除按钮时，我也想删除这些复选框.该怎么做.

I am making a sort of todo app using tkinter. For this I want to generate checkbox dynamically and I have successfully done this using a function but I also want to delete those checkboxes when user press clear button. How can this be done.

name=Stringvar()
ent=Entry(root,textvariable=name).pack()
def clear(ent):
    ent.pack_forget()
def generate():
    k=name.get()
    c=Checkbutton(root,text=k)
    c.pack()
btn1=Button(root,text="Submit",command=generate)
btn1.pack()
btn2=Button(root,text="Clear",command=clear)
btn2.pack()

我想删除该复选框，但由于功能清除不读取 c.pack_forget()

I want to delete the checkbox but I cannot do so as function clear does not read c.pack_forget()

推荐答案

只存储在 generate()中创建的 Checkbutton 的所有对象非常简单像这样

It is very simple to do just store all the objects of Checkbutton created in the generate() function like so

1. 首先，您需要一个 List .

提示:如果需要存储有关该对象的更多信息，请使用字典".

附加创建的每个 Checkbutton .( List.append(c).. )

然后在 for 循环的帮助下，从 List 中的 pack_forget() Checkbutton .如果您不打算将来使用那些检查"按钮，则使用 destroy()而不是 pack_forget().

Then pack_forget() the Checkbutton from the List with the help of for loop. If you are not planning to use those Check buttons in future then use destroy() instead of pack_forget() .

这是代码:

from tkinter import *

root = Tk()

name = StringVar()
check_box_list = []
ent=Entry(root,textvariable=name).pack()

def clear():
    for i in check_box_list:
        i.pack_forget()    # forget checkbutton
        # i.destroy()        # use destroy if you dont need those checkbuttons in future

def generate():
    k=name.get()
    c=Checkbutton(root,text=k)
    c.pack()
    check_box_list.append(c)  # add checkbutton

btn1=Button(root,text="Submit",command=generate)
btn1.pack()

btn2=Button(root,text="Clear",command=clear)
btn2.pack()

mainloop()

如果要分别删除每个而不是全部清除，请尝试此操作.

If you want to remove each one separately instead of clear all then try this.

from tkinter import *

root = Tk()

name = StringVar()
check_box_list = []
ent=Entry(root,textvariable=name).pack()

def clear():
    for i in check_box_list:
        if i.winfo_exists():    # Checks if the widget exists or not
            i.pack_forget()     # forget checkbutton
            # i.destroy()        # use destroy if you dont need those checkbuttons in future

def generate():
    k=name.get()
    f = Frame(root)
    Checkbutton(f, var=StringVar(), text=k).pack(side='left')
    Button(f, text='✕', command=f.destroy).pack(side='left')
    check_box_list.append(f)  # add Frame
    f.pack()

btn1=Button(root,text="Submit",command=generate)
btn1.pack()

btn2=Button(root,text="Clear All",command=clear)
btn2.pack()

mainloop()

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