Question

我正在使用python 3.7.2和tkinter做一些“ Supplementshop”。我想使用“返回主窗口”按钮。因为我正在通过按钮和功能创建新窗口，所以我认为我无法使用.destroy方法...经过一整天的测试某些代码后，我仍然没有设法获得此按钮。我想，我现在需要一些帮助。：D

因为代码已经有大约600行，所以我只是从中做了一个简短的版本。希望足够了。代码：

from tkinter import *
import sys, os


class MainWindow():

    def __init__(self, master, title, size):
        self.master = master
        self.title = title
        self.size = size
        self.master.title(self.title)
        self.master.geometry(self.size)

        self.hitext = Label(self.master,
                            text="some random text,\n to change the previous text lol").pack(fill=X, pady=10)

        self.productButton = Button(self.master,
                                 text="second window",
                                    width=15,
                                    command=self.productButtonClicked).place(x=15, y=55)

        self.quitMainWindow = Button(self.master,
                                     text="exit",
                                     width=15,
                                     command=mainWindow.quit).place(x=170, y=55)

    def productButtonClicked(self):
        productWindow = Toplevel()
        productFenster = ProductMenuWindow(productWindow, "second window", "260x100")


class ProductMenuWindow():

    def __init__(self, master, title, size):
        self.master = master
        self.title = title
        self.size = size
        self.master.geometry(self.size)
        self.master.title(self.title)

        self.text = Label(self.master, text="what do you want to buy?").pack(fill=X, pady=10)

        self.gobackButton = Button(self.master,
                                   text="go back to main window",
                                   width=20,
                                   command="").place(x=55, y=50) #here should be the command for the button


if __name__ == "__main__":
    mainWindow = Tk()
    mainFenster = MainWindow(mainWindow, "root/main/first window", "300x95")
    mainWindow.mainloop()

如果我放command=mainWindow.quit，则主窗口当然会被破坏，程序会停止。因此，这很重要，我现在不进一步介绍了，因为.destroy在这里不起作用...对于某些英语错误：P

Answer 1

我做了一些更改。

将我的版本与您的版本进行比较。

from tkinter import *
import sys, os

class MainWindow():

    def __init__(self, master, title, size):
        self.master = master
        self.title = title
        self.size = size
        self.master.title(self.title)
        self.master.geometry(self.size)

        self.hitext = Label(self.master,
                        text="some random text,\n to change the previous text lol").pack(fill=X, pady=10)

        self.productButton = Button(self.master,
                             text="second window",
                                width=15,
                                command=self.productButtonClicked).place(x=15, y=55)

        self.quitMainWindow = Button(self.master,
                                 text="exit",
                                 width=15,
                                 command=self.on_cancel).place(x=170, y=55)

    def productButtonClicked(self):
        #productWindow = Toplevel()
        obj = ProductMenuWindow(self, "second window", "260x100")
        #productFenster = ProductMenuWindow(productWindow,)

    def on_cancel(self):
        self.master.destroy()        


class ProductMenuWindow(Toplevel):

    def __init__(self, parent, title, size):
        super().__init__(name='product_main_menu')

        self.parent = parent

        self.title(title)

        self.size = size

        self.geometry(size)

        self.text = Label(self, text="what do you want to buy?").pack(fill=X, pady=10)

        self.gobackButton = Button(self,
                               text="go back to main window",
                               width=20,
                               command=self.on_cancel).place(x=55, y=50) #here should be the command for the button

    def on_cancel(self):
        self.destroy()

 if __name__ == "__main__":
    mainWindow = Tk()
    mainFenster = MainWindow(mainWindow, "root/main/first window", "300x95")
    mainWindow.mainloop()

p.s。

super().__init__(name='product_main_menu')

过去，您的ProductMenuWindow上有单身人士。

如果您写super().__init__()，您会看到可以打开多个窗口。

如何使用tkinter在第二个窗口上创建“返回按钮”？

1 个答案: