Python tkinter创建标签，然后删除标签

Question

我想在单击按钮（创建）时在另一个下面创建多个标签，然后在另一个按钮单击（删除）时删除一个实例中的所有标签

现在，我正在考虑为标签创建多个名称——每个名称只需单击一次即可创建。所以如果我点击按钮n次，我会得到n个名字：myLabel1，myLabel2，…，myLabeln

然后，当我点击删除按钮时，我会看到如下内容- myLabel1.destroy（）， myLabel2.destroy（）， . . . myLabeln.destroy（）

我正在努力以-myLabel1=tk.Label等形式将这些名称分配给标签。 我用MATLAB中的求值函数来思考。Python有类似的功能吗

还有更好的方法来做我想做的事吗

如果我使用.pack（）方法，我的标签会一个接一个。但它们都只分配给myLabel（因为我使用myLabel=tk.Label）。当我使用myLabel.destroy（）时，只删除label的最后一个实例

使用.pack（）和myLabel的单一用法编写代码，其中标签根据需要形成，但只删除最后一个标签：

import tkinter as tk
from tkinter import ttk
import tkinter.font as tkFont

root = tk.Tk()

def click():
    global myLabel
    myLabel = tk.Label(root, text = e.get())
    myLabel.pack(pady=10)
    e.delete(0,'end')

def delete():
    myLabel.destroy()

e = tk.Entry(root, width = 50)
e.pack(padx = 10, pady = 10)

CreateButton = tk.Button(root, text = 'Enter name', command = click)
CreateButton.pack(pady=10)

DeleteButton = tk.Button(root, text = 'Delete', command = delete)
DeleteButton.pack(pady=40)

root.mainloop()

但由于这只会删除创建的最后一个标签，我尝试了我在开始时提到的方法-

import tkinter as tk
from tkinter import ttk
import tkinter.font as tkFont

ii = 0

root = tk.Tk()

def click():
    global labelname, ii
    ii += 1
    labelname = 'myLabel' + str(ii)
    print(labelname)
    labelname = tk.Label(root, text = e.get()) # I wanted 'labelname' here to be 'myLabel1'
    e.delete(0,'end')

def delete():
#     for ii in range(1,max(ii)):
    labelname.config(text = '') # I wanted 'labelname' here to be 'myLabeln' in a for loop going from 1 to n

e = tk.Entry(root, width = 50)
e.pack(padx = 10, pady = 10)

CreateButton = tk.Button(root, text = 'Enter name', command = click)
CreateButton.pack(pady=10)

DeleteButton = tk.Button(root, text = 'Delete', command = delete)
DeleteButton.pack(pady=40)

root.mainloop()

也许我会用一种非常复杂的方式来处理它，有一种更简单的方法不用For循环，等等

请给我一些建议

多谢各位

R

Answer 1

您可以使用这个脚本：每个标签的文本都存储在var标签中

您可以在新行中重新创建一个标签，而不是为每个标签指定一个变量，但可以将其添加到数组或类似于可以包含所有标签的数组中，这样您就可以随时删除每个标签

from tkinter import *

win = Tk()                         # create the window

labels = []                        # no labels

def add_label():
    global labels, text
    labels.append(Label(win, text=text.get())) # append a label object to the list
    labels[-1].pack()              # draw the last label

def delete_all_labels():
    global labels
    for label in labels:           # delete all the labels
        label.pack_forget()
    labels = []

text = Entry(win)                  # add the entry
text.pack()

Button(win, text="Create new label", command=add_label).pack()
Button(win, text="Delete all the labels", command=delete_all_labels).pack()

win.mainloop()

填写条目并单击按钮

可以使用网格来组织窗口。在这种情况下，请使用grid_forget和not pack_forget删除标签

from tkinter import *

win = Tk()                         # create the window

labels = []                        # no labels

                                   # index for method grid()
rowIndex = 2                       # Set to 2 because of the
                                   # buttons and the entry.
                                   # this variable is used to increment
                                   # the y position of the labels so that
                                   # they are drawn one after the other,
                                   # and not on top of each other.

def add_label():
    global labels, text, rowIndex
    labels.append(Label(win, text=text.get())) # append a label object to the list
    rowIndex += 1                  # increment the y position

                                   # draw the added label
    labels[-1]\
            .grid(columnspan=2,    # for align in the middle.
                  row=rowIndex,    # y position specific to this label
                  pady=5)

def delete_all_labels():
    global labels
    for label in labels:           # delete all the labels
        label.grid_forget()        # one by one

    rowIndex = 2                   # reset the vars
    labels = []                    #

label=Label(win, text="Type the text :")
label.grid(column=0, row=0, padx=5)

text = Entry(win)                  # add the entry
text.grid(column=1, row=0, padx=5)
text.focus()                       # focus in entry

Button(win, text="Create new label", command=add_label)\
            .grid(column=0, row=1, padx=5)
Button(win, text="Delete all the labels", command=delete_all_labels)\
            .grid(column=1, row=1, padx=5)

win.mainloop()