Question

我是tkinter的新手，这是一个简单的方法，但我不知道该怎么做。我想创建一个提交按钮，如果给出相同的用户输入并再次提交按钮将禁用，但如果给出新输入，它将执行其功能。有人可以帮我弄这个吗？谢谢

Answer 1

如果我理解问题 - 您必须创建列表以记住提交的数据并使用新输入进行检查

import tkinter as tk

# --- functions ---

def submit():
    data = e.get()

    if data in already_submitted:
        print('Sorry already submitted:', data)
    else:    
        print('Submit:', data)
        already_submitted.append(data)

# --- main ---

# don't submit empty string        
already_submitted = ['']

root = tk.Tk()

e = tk.Entry(root)
e.pack()

b = tk.Button(root, text="Submit", command=submit)
b.pack()

root.mainloop()

顺便说一句：您还可以bind()运行Entry，并在每key次和禁用/启用按钮后检查输入。

import tkinter as tk

# --- functions ---

def submit():
    data = e.get()

    if data in already_submitted:
        print('Sorry already submitted:', data)
    else:    
        print('Submit:', data)
        already_submitted.append(data)
        b['state'] = 'disable'

def check(event):
    #data = event.widget.get()
    data = e.get()

    if data in already_submitted:
        b['state'] = 'disable'
    else:
        b['state'] = 'normal'

# --- main ---

# don't submit empty string        
already_submitted = ['']

root = tk.Tk()

e = tk.Entry(root)
e.pack()
e.bind('<KeyRelease>', check)

b = tk.Button(root, text="Submit", command=submit, state='disable')
b.pack()

root.mainloop()

除非给出不同的输入，否则tkinter仅提交按钮句柄功能一次

1 个答案: