from tkinter import *
import tkinter.messagebox as messagebox
class Application(Frame):
def __init__(self, master=None):
Frame.__init__(self, master)
self.pack()
self.createWidgets()
def createWidgets(self):
self.nameInput = Entry(self)
self.nameInput.pack()
self.alertButton = Button(self, text='Hello', command=self.hello)
self.alertButton.pack()
self.helloLabel = Label(self, text='Hello, world!') #widget
#pack()方法把Widget加入到父容器中，并实现布局
self.helloLabel.pack()
self.quitButton = Button(self, text='Quit', command=self.quit) #widget
self.quitButton.pack()
def hello(self):
name = self.nameInput.get() or 'world'
messagebox.showinfo('Message', 'Hello, %s' % name)
app = Application()
# 设置窗口标题
app.master.title('Hello World')
# 主消息循环
app.mainloop()
