Question

我目前正在 tkinter 编写一个基本程序，并且遇到一个特定窗口的问题，称为“appetiser”。< / p>

上一个屏幕上的按钮。

我对我遇到的问题感到困惑所以我粘贴了下面的整个appetiser窗口。（抱歉只是把它转储到这里）

#Appetiser Window
def appetiser():
    global app, root


#----------------------------------MEAL-1------------------------
#----------------------------------MEAL-1------------------------
    def PlusMix():
        global MixQuan
        MixQuan = MixQuan + 1
        DisplayButton["text"]=str(MixQuan)

    def NegMix():
        global MixQuan
        MixQuan = MixQuan - 1
        DisplayButton["text"]=str(MixQuan)

    Label(app, text = "", width = 65, height = 5).grid(row = 1, column = 0, sticky = N)

    Label(app,text = "Mixed Starter", font = ("roboto", 20)).grid(row = 2, column = 1, sticky = W)

    DisplayButton = Button(app, text = MixQuan, bg="magenta")
    DisplayButton.grid(column = 3, row = 2, sticky = W)
    DisplayButton.config(height = 10, width = 10 )

    Plus1Button = Button(app, text = "+1", command=PlusMix, bg="magenta")
    Plus1Button.grid(column = 4, row = 2, sticky = W)
    Plus1Button.config(height = 10, width = 10 )

    Neg1Button = Button(app, text = "-1", command=NegMix, bg="magenta")
    Neg1Button.grid(column = 2, row = 2, sticky = W)
    Neg1Button.config(height = 10, width = 10 )
#----------------------------------MEAL-2-------------------------
#----------------------------------MEAL-2-------------------------

    def PlusDuck():
        global DuckQuan
        DuckQuan = DuckQuan + 1 
        Display2Button["text"]=str(DuckQuan)

    def NegDuck():
        global DuckQuan
        DuckQuan = DuckQuan - 1 
        Display2Button["text"]=str(DuckQuan)



    Label(app,text = "Crispy Duck", font = ("roboto", 20)).grid(row = 3, column = 1, sticky = W)


    Display2Button = Button(app, text = DuckQuan, bg="magenta")
    Display2Button.grid(column = 3, row = 3, sticky = W)
    Display2Button.config(height = 10, width = 10 )

    Plus2Button = Button(app, text = "+1", command=PlusDuck, bg="magenta")
    Plus2Button.grid(column = 4, row = 3, sticky = W)
    Plus2Button.config(height = 10, width = 10 )

    Neg2Button = Button(app, text = "-1", command=NegDuck, bg="magenta")
    Neg2Button.grid(column = 2, row = 3, sticky = W)
    Neg2Button.config(height = 10, width = 10 )

#----------------------------------MEAL-3---------------------------
#----------------------------------MEAL-3---------------------------

    def plus3():
        global LambQuan
        LambQuan = LambQuan + 1 
        Display3Button["text"]=str(LambQuan)

    def neg3():
        global LambQuan
        LambQuan = LambQuan - 1 
        Display3Button["text"]=str(LambQuan)

    Label(app,text = "Lamb starter", font = ("roboto", 20)).grid(row = 4, column = 1, sticky = W)

    Display3Button = Button(app, text = LambQuan, bg="magenta")
    Display3Button.grid(column = 3, row = 4, sticky = W)
    Display3Button.config(height = 10, width = 10 )

    Plus3Button = Button(app, text = "+1", command=plus3, bg="magenta")
    Plus3Button.grid(column = 4, row = 4, sticky = W)
    Plus3Button.config(height = 10, width = 10 )

    Neg3Button = Button(app, text = "-1", command=neg3, bg="magenta")
    Neg3Button.grid(column = 2, row = 4, sticky = W)
    Neg3Button.config(height = 10, width = 10 )

#----------------------------------------------------
#----------------------------------------------------

    BackButton = Button(app, text = "Back", command=OpenMain, bg="magenta")
    BackButton.grid(column = 2, row = 5, sticky = W)
    BackButton.config(height = 10, width = 10 )


    FinishButton = Button(app, text = "Finish", command=OpenFinish, bg="magenta")
    FinishButton.grid(column = 4, row = 5, sticky = W)
    FinishButton.config(height = 10, width = 10 )


    app = Frame(root)
    app.grid()

    Label(app, text = "", width = 75, height = 20).grid(row = 1, column = 0, sticky = N)

    root.mainloop()

现在

从其他窗口调用2个函数 OpenMain() 和 OpenWindow() 以返回到之前的屏幕，但在其他窗口中调用它们时工作正常窗户。

我只是在“ [FinishButton] ”和“ [BackButton] ”中调用此窗口中的函数时遇到问题。< / p>

以下是之前调用过的2个函数，工作正常。

#Wipe window and open main
def OpenMain():
    global app, root
    app.destroy()
    app = Frame(root) 
    app.grid()
    main()

#Wipe appetiser window and draw finish window
def OpenFinish():   
    global app, root
    app.destroy()
    app = Frame(root) 
    app.grid()
    FinishWindow()

调用OpenFinish()函数后，“appetiser”窗口不会被销毁，主窗口会直接在appetiser 窗口。

就像我说的，抱歉只是在这里转储我的代码，但我无法弄清楚问题。

这些功能在其他窗口中运行得很好，我也遵循相同的格式为程序的其余部分创建窗口。

任何帮助将不胜感激！

Answer 1

避免使用global -s
设计
撰写对象＆amp; 管理他们的对齐＆amp; 控制严格限制在.Tk() / .Toplevel() / .Frame()“容器”的基于Tkinter的hiearachy中的内容“
避免自我毁灭的做法，使 .Button() 具备通过.destroy() +分配给self进行杀戮的权力

#  <appetiser> is not a window, it is a procedure ( a segment of code )
#
def appetiser():
    global app, root
    ...
    BackButton   = Button( app,
                           text    = "Back",
                           command = OpenMain,             # --> app.destroy()-->
                           bg      = "magenta"
                           )
    ...
    FinishButton = Button( app,
                           text    = "Finish",
                           command = OpenFinish,           # --> app.destroy()-->
                           bg      = "magenta"
                           )
    ...
# -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- |
#                                                                               v
def OpenMain():
    global app, root
    app.destroy()                                          # <-- COMMIT SUICCIDE
    app = Frame( root )                                    # new Frame instance
    app.grid()
    ...

def OpenFinish():   
    global app, root
    app.destroy()                                          # <-- COMMIT SUICCIDE
    app = Frame( root )                                    # new Frame instance
    ...

Tkinter - Python 3.3 - 破坏窗口的问题

现在

1 个答案: