如何来隐藏、恢复、删除Tkinter的控件

通过小例子帮助我们更好的理解如何使用tkinter控件的 pack_forget(),grid_forget(),grid_remove()

https://www.delftstack.com/howto/python-tkinter/how-to-hide-recover-and-delete-tkinter-widgets/

1. pack_forget() 方法来隐藏Tkinter控制

与pack()方法相反，我们可以通过调用pack_forget()方法来隐藏Tkinter控件

try:
    import Tkinter as tk
except:
    import tkinter as tk
    

class Test():
   def __init__(self):
       self.root = tk.Tk()
       self.label=tk.Label(self.root,
                           text = "Label")
       self.buttonForget = tk.Button(self.root,
                          text = 'Click to hide Label',
                          command=lambda: self.label.pack_forget())
       self.buttonRecover = tk.Button(self.root,
                          text = 'Click to show Label',
                          command=lambda: self.label.pack())       
       
       self.buttonForget.pack()
       self.buttonRecover.pack()
       self.label.pack(side="bottom")
       self.root.mainloop()

   def quit(self):
       self.root.destroy()
        
app = Test()

点"Click to hide Label"按钮，通过调用pack_forget()方法，将会隐藏Label标签
点"Click to show Label"按钮，通过执行pack()方法，程序会再次在界面显示Label标签

grid_forget() 方法来隐藏控件

如果控制是用grid()方法来绘制的，可以通过grid_forget()方法来隐藏控件

try:
    import Tkinter as tk
except:
    import tkinter as tk
    

class Test():
   def __init__(self):
       self.root = tk.Tk()
       self.label=tk.Label(self.root,
                           text = "Label")
       self.buttonForget = tk.Button(self.root,
                          text = 'Click to hide Label',
                          command=lambda: self.label.grid_forget())
       self.buttonRecover = tk.Button(self.root,
                          text = 'Click to show Label',
                          command=lambda: self.label.grid())       
       
       self.buttonForget.grid(column=0, row=0, padx=10, pady=10)
       self.buttonRecover.grid(column=0, row=1, padx=10,  pady=10)
       self.label.grid(column=0, row=2, padx=10, pady=10)
       self.root.mainloop()

   def quit(self):
       self.root.destroy()
        
app = Test()

当你执行了隐藏按钮的动作后，会发现label标签的原始位置发生了变化。如果想让它回到原始位置，
那么可行的方法是用grid_remove()主法来操作。

用grid_remove()方法来保持隐藏控制的可再现位置

grid_remove()方法在隐藏控件的同时会记住控件行，列位置属性便于恢复

try:
    import Tkinter as tk
except:
    import tkinter as tk
    

class Test():
   def __init__(self):
       self.root = tk.Tk()
       self.label=tk.Label(self.root,
                           text = "Label")
       self.buttonForget = tk.Button(self.root,
                          text = 'Click to hide Label',
                          command=lambda: self.label.grid_remove())
       self.buttonRecover = tk.Button(self.root,
                          text = 'Click to show Label',
                          command=lambda: self.label.grid())       
       
       self.buttonForget.grid(column=0, row=0, padx=10, pady=10)
       self.buttonRecover.grid(column=0, row=1, padx=10,  pady=10)
       self.label.grid(column=0, row=2, padx=10, pady=20)
       self.root.mainloop()

   def quit(self):
       self.root.destroy()
        
app = Test()

通地destroy方法来删除控件

try:
    import Tkinter as tk
except:
    import tkinter as tk
    

class Test():
   def __init__(self):
       self.root = tk.Tk()
       self.label=tk.Label(self.root,
                           text = "Label")
       self.buttonForget = tk.Button(self.root,
                          text = 'Click to hide Label',
                          command=lambda: self.label.destroy())
       self.buttonRecover = tk.Button(self.root,
                          text = 'Click to show Label',
                          command=lambda: self.label.pack())       
       
       self.buttonForget.pack()
       self.buttonRecover.pack()
       self.label.pack(side="bottom")
       self.root.mainloop()

   def quit(self):
       self.root.destroy()
        
app = Test()

执行删除操作后，如果再次执行pack()方法，程序则会报错

Exception in Tkinter callback
Traceback (most recent call last):
  File "D:\WinPython\WPy-3661\python-3.6.6.amd64\lib\tkinter\__init__.py", line 1702, in __call__
    return self.func(*args)
  File "C:\Users\jinku\OneDrive\Bureaublad\test.py", line 17, in <lambda>
    command=lambda: self.label.pack())
  File "D:\WinPython\WPy-3661\python-3.6.6.amd64\lib\tkinter\__init__.py", line 2140, in pack_configure
    + self._options(cnf, kw))
_tkinter.TclError: bad window path name ".!label"

来源：CSDN

作者：weixin_45217673

链接：https://blog.csdn.net/weixin_45217673/article/details/104041861