GUI tkinter (Entry) 输入框篇

"""
1、其他函数不常用，这里只说get函数，get函数使用的时候不需要任何参数，它的返回值就是该输入框的内容。
"""

from tkinter import *

def reg():
    s1 = e1.get()
    s2 = e2.get()
    t1 = len(s1)
    t2 = len(s2)
    if s1 == "111" and s2 == "222":
        c["text"] = "登录成功"
    else:
        c["text"] = "用户名或密码错误"
        e1.delete(0,t1)
        e2.delete(0,t2)

root = Tk()

lb1 = Label(root,text = "用户名: ")
lb1.grid(row = 0, column = 0,sticky = W)

e1 = Entry(root)
e1.grid(row = 0, column = 1,sticky = E)

lb2 = Label(root,text = "密  码: ")
lb2.grid(row = 1, column = 0,sticky = W)

# 设置它的 show 属性让它 变成一个密码框，即e[‘show’] = ‘*’就可以了。
e2 = Entry(root)
e2['show'] = '*'
e2.grid(row = 1, column = 1,sticky = E)

btn = Button(root,text = "登录",command= reg)
btn.grid(row = 2, column = 1,sticky = E)

c = Label(root,text = "")
c.grid(row = 3)

root.mainloop()
运行结果如下：