当我打开下一个窗口时，试图让我的 GUI 窗口自动退出

Question

如何在单击下一个窗口按钮时自动取消第一个窗口？

示例代码：

from tkinter import *
from tkinter import messagebox

root = Tk()
root.title("GUI practice")

def open():
    top = Toplevel()  # new window
    top.title("Kokomi")
    labels = Label(top, text="This one automatically close when i click the next window").pack()
    button2 = Button(top,text="Close window", command=top.destroy).pack()
    button3 = Button(top,text="Next window", command=open2).pack()

def open2():
    top = Toplevel()  # new window
    top.title("Guide")
    labels = Label(top, text="end").pack()
    button2 = Button(top, text="Close window", command=top.destroy).pack()  # destroy to quit things

button = Button(root, text="Open(No need to close this)", command=open).pack()


root.mainloop()

---

[Click open][1]
[Click Next window and after that this windows should disappear and continue to the 3rd picture][2]
[The 2nd picture goes disappear when i click the next window][3]

  [1]: https://i.stack.imgur.com/plS1T.png
  [2]: https://i.stack.imgur.com/EFW76.png
  [3]: https://i.stack.imgur.com/xSZCp.png

Answer 1

对于这种使用两个函数和两个窗口的特定情况，您只需将Toplevel 小部件重命名为不同的名称，然后将其中一个全局化，然后从另一个函数访问它并在显示新窗口之前将其销毁。

def open():
    global top
    top = Toplevel()  # new window
    top.title("Kokomi")

    Label(top, text="This one automatically close when i click the next window").pack()
    Button(top, text="Close window", command=top.destroy).pack()
    Button(top, text="Next window", command=open2).pack()

def open2():
    top.destroy() # Destroy previously open window
    top1 = Toplevel()  # new window
    top1.title("Guide")

    Label(top1, text="end").pack()
    Button(top1, text="Close window", command=top1.destroy).pack()  # destroy to quit things

如果你注意到了，我删除了按钮和标签的变量名，因为它们的值是None，阅读Tkinter: AttributeError: NoneType object has no attribute <attribute name>。

当您希望使用更多功能和窗口时，您必须手动按照此步骤操作所有功能。当然，除非有更好、更简洁的方式来使用类和框架来设计您的应用。

或者您也可以从一个按钮调用两个函数，这种方法将摆脱全球化和重命名，并且可能比上述解决方案更好一点：

def open():
    top = Toplevel()  # new window
    top.title("Kokomi")

    Label(top, text="This one automatically close when i click the next window").pack()
    Button(top, text="Close window", command=top.destroy).pack()
    Button(top, text="Next window", command=lambda: [top.destroy(),open2()]).pack()

def open2():
    top = Toplevel()  # new window
    top.title("Guide")

    Label(top, text="end").pack()
    Button(top, text="Close window", command=top.destroy).pack()  # destroy to quit things