Python 如何通过切换帧功能将Tkinter输入值从一帧传递到另一帧_Python_Python 3.x_Tkinter_Frame_Tkinter Entry

Python 如何通过切换帧功能将Tkinter输入值从一帧传递到另一帧

python python-3.x tkinter

Python 如何通过切换帧功能将Tkinter输入值从一帧传递到另一帧,python,python-3.x,tkinter,frame,tkinter-entry,Python,Python 3.x,Tkinter,Frame,Tkinter Entry,我的Tkinter应用程序添加了笔记本，在笔记本中我想使用按钮切换框架。实现了笔记本交换机和框架交换机。当我单击“确定”按钮时，我想将输入从笔记本的一个框架转移到另一个框架我试图将该值作为参数传递给框架类初始化将输入字段值指定给全局变量框架内：类选项卡1\u框架1 希望将值从self.uidentry=Entry（self，bd=5）传递到类Tab1\u Frame2 import tkinter as tk from tkinter import * from tkinter impor

我的Tkinter应用程序添加了笔记本，在笔记本中我想使用按钮切换框架。实现了笔记本交换机和框架交换机。当我单击“确定”按钮时，我想将输入从笔记本的一个框架转移到另一个框架

我试图将该值作为参数传递给框架类初始化

将输入字段值指定给全局变量

框架内：类选项卡1\u框架1 希望将值从self.uidentry=Entry（self，bd=5）传递到类Tab1\u 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

self.master.switch\u frame（）中的方法，该方法只切换选项卡
self.button = Button(self, text="OK", command=lambda: master.switch_frame(Tab1_Frame2))

但它可以使用自己的方法，使用self.master.switch_frame（）
切换选项卡，并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

或者到master
和其他选项卡可以在\uuuu init\uuuu
中获取它：
    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

每个选项卡在切换框中可能有不同的代码
最好在master
中以默认值开始创建此变量
这里的master
是Tab1
但是使用master.master
你可以将它保存在笔记本中，并在RootApp
中使用master.master.master


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()

您可以在RootApp
中声明StringVar
，例如self.myvar=StringVar（）
，并设置uientry
的textvariable=self.master.myvar
。然后您可以通过另一个框架中的self.master.myvar
访问StringVar
。当然，您必须将传递的master
保存到框架实例中的self.master
。对不起，我不明白这一点，您能举个简单的例子吗？我已经在RootApp类中添加了self.myvar=StringVar（）
，并在类Tab1\u Frame1的self.master.myvar=self.uidentry.get（）
中定义了它。然后我试图从类Tab1\u Frame2中读取值self.master.myvar
。但它不起作用在你的情况下，它应该是类中的self.master.master.master.myvar
，因为self.master
是Tab1
类，self.master.master
是Notebook
类和self.master.master.master
是RootApp
类。你应该设置uidentry的textvariable
像self.uidentry=Entry（self，textvariable=master.master.master.myvar，bd=5）
。嘿！这是一个很好的方法，当然，它提供了一个很好的解决方案，所以感谢您！我必须调整我的程序以使用一个条目，因为我试图在按下按钮和切换帧时发送一个值。如果你有解决办法，请告诉我！谢谢