这是我的代码:
print '1'
from Tkinter import *
print '2'
class myApp:
print '3'
def __init__(self,parent):
print '4'
## self.myparent = parent line1
print '11'
self.myContainer1 = Frame(parent)
print '12'
self.myContainer1.pack()
print '13'
self.button1 = Button(self.myContainer1,text="OK",background="green")
print '14'
self.button1.pack(side=LEFT)
print '15'
self.button1.bind("<Button-1>",self.button1Click)
print '16'
self.button2 = Button(self.myContainer1,text="Cancel",background="cyan")
print '17'
self.button2.pack(side=RIGHT)
print '18'
self.button2.bind("<Button-1>",self.button2Click)
print '19'
def button1Click(self,event):
print '5'
if self.button1['background'] == 'green':
print '20'
self.button1['background'] ='tan'
print '21'
else:
print '22'
self.button1['background'] = 'yellow'
print '23'
def button2Click(self,event):
print '6'
## self.myparent.destroy()
self.parent.destroy()
print '7'
root = Tk()
print '8'
myapp = myApp(root)
print '9'
root.mainloop()
print '10'
错误是:
>>> ================================ RESTART ================================
>>>
1
2
3
7
8
4
11
12
13
14
15
16
17
18
19
9
5
20
21
5
22
23
6
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Python26\lib\lib-tk\Tkinter.py", line 1403, in __call__
return self.func(*args)
File "C:\Documents and Settings\he00044.HALEDGEWOOD\Desktop\TkinterExamples\buttonBind.py", line 56, in button2Click
self.parent.destroy()
AttributeError: myApp instance has no attribute 'parent'
10
>>>
这是我评论第1行
的时候可能是becoz myapp没有找到父母。
但这个概念并不清楚。
任何人都可以详细解释这个概念......
答案 0 :(得分:2)
为什么你曾经评论过提及self.myparent
的那两行,并创建一个提到一个神秘的,从未初始化的self.parent
?当然,这是你问题的开始 - 看起来像是荒谬的,蓄意的破坏代码。
答案 1 :(得分:0)
将传入参数parent分配给self.parent?
def __init__(self,parent):
self.parent = parent
答案 2 :(得分:0)
你的问题不是与tkinter有关,而是与面向对象的设计有关。
类 myApp 具有 __ init __ 方法(构造函数,创建该类对象时执行的方法),以及按钮单击的两种方法。在button2Click方法中,您尝试读取属性 self.parent (翻译为 myapp.parent ),但未定义此属性。
取消注释第1行时,您不会收到错误。这是因为您正在创建属性 myapp.parent ,并且您正在将Tk根小部件分配给此属性。这是必要的,因为您创建的所有窗口小部件都必须接收其父窗口小部件。
答案 3 :(得分:0)
到目前为止,其他答案都很棒。
这也可能有所帮助:Fredrik Lundh's intro to Tkinter。
为您的代码添加了一些注释,以及其他答案,可以帮助您再次移动:
import Tkinter
class MyApp:
def __init__(self, parent): # constructor
self.parent = parent # the parent here is 'root'
self.myContainer1 = Tkinter.Frame(self.parent) # create Frame w/ root as parent
self.myContainer1.pack() # make Frame (myContainer1) visible
self.button1 = Tkinter.Button(self.myContainer1,
text="OK", background="green") # add button as child of Frame
self.button1.pack(side=Tkinter.LEFT) # place button1 in Frame
self.button1.bind("<Button-1>",self.button1Click) # bind left mouse button to button1Click method
self.button2 = Tkinter.Button(self.myContainer1, text="Cancel",
background="cyan")
self.button2.pack(side=Tkinter.RIGHT)
self.button2.bind("<Button-1>", self.button2Click)
def button1Click(self, event):
if self.button1['background'] == 'green':
self.button1['background'] ='tan'
else:
self.button1['background'] = 'yellow'
def button2Click(self, event):
self.parent.destroy() # the parent here is 'root', so you're ending the event loop
root = Tkinter.Tk() # create root widget (a window)
myapp = MyApp(root) # create instance of MyApp with root as the parent
root.mainloop() # create event loop (ends when window is closed)