如何通过我的切换帧函数将 Tkinter 条目值从一个帧传递到另一个帧

我的 Tkinter 应用程序添加了笔记本，在笔记本内我想使用按钮切换框架。实现了笔记本开关和框架开关。当我单击“确定”按钮时，我想将笔记本的一帧输入输入到另一帧enter code here

我尝试将值作为框架类初始化的参数传递

将输入字段值分配给全局变量

在框架中：类 Tab1_Frame1 想要将值从 self.uidentry = Entry(self, bd=5) 传递到类 Tab1_Frame2

import tkinter as tk
from tkinter import *
from tkinter import ttk

# Root class to create the interface and define the controller function to switch frames
class RootApp(tk.Tk):
    def __init__(self):
        tk.Tk.__init__(self)
        self._frame = None
        self.switch_frame(NoteBook)

# controller function
    def switch_frame(self, frame_class):
        new_frame = frame_class(self)
        if self._frame is not None:
            self._frame.destroy()
        self._frame = new_frame
        self._frame.pack()

# sub-root to contain the Notebook frame and a controller function to switch the tabs within the notebook
class NoteBook(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self.notebook = ttk.Notebook()
        self.tab1 = Tab1(self.notebook)
        self.notebook.add(self.tab1, text="User Bash History")
        self.notebook.pack()

# controller function
    def switch_tab1(self, frame_class):
        new_frame = frame_class(self.notebook)
        self.tab1.destroy()
        self.tab1 = new_frame

# Notebook - Tab 1
class Tab1(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self._frame = None
        self.switch_frame(Tab1_Frame1)

    def switch_frame(self, frame_class):
        new_frame = frame_class(self)
        if self._frame is not None:
            self._frame.destroy()
        self._frame = new_frame
        self._frame.pack()


# first frame for Tab1
class Tab1_Frame1(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self.label = Label(self, text="Userbash history")

        self.userid = Label(self, text ="User ID", bg="blue", fg="white")
        self.userid.pack()
        self.newWindow = None
        self.uidentry = Entry(self, bd=5)
        self.uidentry.pack()

        global uid
        uid = self.uidentry.get()
        # button object with command to replace the frame
        self.button = Button(self, text="OK", command=lambda: master.switch_frame(Tab1_Frame2))
        self.label.pack()
        self.button.pack()

    def new_window(self):
        if self.newWindow is not None:
            self.newWindow.destroy()
        self.newWindow = Frame(self)

        self.uid=self.uidentry.get()
        self.app = logwindow(self.newWindow, self.uid)     

# second frame for Tab1
class Tab1_Frame2(Frame):
    def __init__(self, master):
        Frame.__init__(self, master)
        self.label = Label(self, text="it has been changed!")       

        # and another button to change it back to the previous frame
        self.button = Button(self, text="self" , command=lambda: master.switch_frame(Tab1_Frame1))
        self.label.pack()
        self.button.pack()
    def new_window(self):
        self.newWindow = tk.Toplevel(self.master)
        self.uid=self.uidentry.get()




if __name__ == "__main__":
    Root = RootApp()
    Root.geometry("640x480")
    Root.title("My Host APP")
    Root.mainloop()```

您的按钮使用 master 的方法self.master.switch_frame()仅切换选项卡

self.button = Button(self, text="OK", command=lambda: master.switch_frame(Tab1_Frame2))

但它可以使用自己的方法，该方法将使用self.master.switch_frame()切换选项卡，它还会将值从当前选项卡直接移动到新选项卡：

    self.button = tk.Button(self, text="OK", command=self.switch_frame)

def switch_frame(self):
    # get value from Entry in current Tab
    value = self.uidentry.get()

    # switch tab
    self.master.switch_frame(Tab1_Frame2)

    # use value directly in new Tab
    self.master._frame.uidentry = value
    self.master._frame.label['text'] = value

or to master和其他选项卡可以获取它__init__ :

    self.button = tk.Button(self, text="OK", command=self.switch_frame)

def switch_frame(self):
    # keep uidentry in master
    self.master.uidentry = self.uidentry.get()

    # switch tab
    self.master.switch_frame(Tab1_Frame2)

class Tab1_Frame2(tk.Frame):

    def __init__(self, *args, **kwargs):

        # get uidentry from master
        self.uidentry = self.master.uidentry
        self.label['text'] = self.master.uidentry

每个选项卡可能有不同的代码switch_frame

最好在中创建这个变量master开始时使用默认值。

Here master is Tab1但使用master.master你可以把它保留在NoteBook，并使用master.master.master in RootApp

完整代码：

import tkinter as tk
from tkinter import ttk


class RootApp(tk.Tk):

    def __init__(self):
        super().__init__()

        self.geometry("640x480")
        self.title("My Host APP")

        self._frame = None
        self.switch_frame(NoteBook)

    def switch_frame(self, frame_class):

        new_frame = frame_class(self)

        if self._frame:
            self._frame.destroy()

        self._frame = new_frame
        self._frame.pack()


class NoteBook(tk.Frame):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.notebook = ttk.Notebook()
        self.tab1 = Tab1(self.notebook)
        self.notebook.add(self.tab1, text="User Bash History")
        self.notebook.pack()

    def switch_tab1(self, frame_class):
        new_frame = frame_class(self.notebook)
        self.tab1.destroy()
        self.tab1 = new_frame


class Tab1(tk.Frame):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.uid = '' # default value at start

        self._frame = None
        self.switch_frame(Tab1_Frame1)

    def switch_frame(self, frame_class):

        new_frame = frame_class(self)

        if self._frame:
            self._frame.destroy()

        self._frame = new_frame
        self._frame.pack()


# first frame for Tab1
class Tab1_Frame1(tk.Frame):

    def __init__(self, *args, **kwargs):
        global uid

        super().__init__(*args, **kwargs)

        self.label = tk.Label(self, text="Userbash history")
        self.label.pack()

        self.userid = tk.Label(self, text ="User ID", bg="blue", fg="white")
        self.userid.pack()

        self.newWindow = None

        self.uidentry = tk.Entry(self, bd=5)
        self.uidentry.pack()

        uid = self.uidentry.get()

        # button object with command to replace the frame
        self.button = tk.Button(self, text="OK", command=self.switch_frame)
        self.button.pack()

    def switch_frame(self):
        # get value from Entry in current Tab
        value = self.uidentry.get()

        # keep value in master
        self.master.uid = value

        # switch tab
        self.master.switch_frame(Tab1_Frame2)

        # use value directly in new Tab
        #self.master._frame.uid = value
        #self.master._frame.label['text'] = value

    def new_window(self):

        if self.newWindow:
            self.newWindow.destroy()

        self.newWindow = tk.Frame(self)

        self.uid = self.uidentry.get()
        self.app = logwindow(self.newWindow, self.uid)     


class Tab1_Frame2(tk.Frame):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        self.label = tk.Label(self, text="it has been changed!")       
        self.label.pack()

        # get value from master
        self.uid = self.master.uid
        self.label['text'] = self.uid

        # and another button to change it back to the previous frame
        self.button = tk.Button(self, text="self", command=lambda: self.master.switch_frame(Tab1_Frame1))
        self.button.pack()

    def new_window(self):
        self.newWindow = tk.Toplevel(self.master)

        self.uid = self.uidentry.get()


if __name__ == "__main__":
    root = RootApp()
    root.mainloop()