代码

Question

我正在尝试grid_forget()由for循环创建的特定按钮，我可以单独引用哪个按钮但是我无法引用单个按钮来“忘记”它们（然后将它们替换为标签虽然不包括在问题中。）

那么有人知道如何引用循环创建的各个按钮并随后隐藏小部件吗？

代码

#Importing modules
from tkinter import*

#Defining global variables
root = Tk()


class GUI():
    #Class for all widgets
    def __init__(self):
        #Sets up nothing
        pass

    def create_button(self, info, boom, posit):
        #Creates buttons
        self.button = Button(root)
        self.button.config(text=info)
        self.button.config(command=boom)
        self.button.grid(column=posit[0],row=posit[1])

    def create_label(self, info, posit):
        #Creates labels
        self.label = Label(root)
        self.label.config(text=info)
        self.label.grid(column=posit[0],row=posit[1])

    def go_away(self):
        #Makes buttons disappear
        #self.button.grid_forget()
        self.button.destroy()

    def come_back(self):
        #Makes buttons reappear
        self.button.grid()

    def user_input(self,row,column):
        print("Row:", row)
        print("Column:", column)
        self.configure(row,column)
        print(self.button)

    def create_board(self):
        for x in range(3):
            for y in range(3):
                cmd = lambda row=y, column=x: self.user_input(row,column)
                self.create_button("   ", cmd, [x,y])

class Board(GUI):
    def __init__(self):
        self.create_board()
        self.create_label("Hey",[3,0])
        self.board = ["x", "x", "O", "O", "O", "O", "O", "O", "O"]

        row1 = [self.board[0],self.board[1],self.board[2]]
        row2 = [self.board[3],self.board[4],self.board[5]]
        row3 = [self.board[6],self.board[7],self.board[8]]

        colum1 = [self.board[0],self.board[3],self.board[6]]
        colum2 = [self.board[1],self.board[4],self.board[7]]
        colum3 = [self.board[2],self.board[5],self.board[8]]

        self.rows = [row1,row2,row3]
        self.colums = [colum1,colum2,colum3]

    def configure(self,row,column):
        self.rows[row][column] = "O"
        self.board = []
        for row in self.rows:
            for position in row:
                self.board.append(position)

nodes = GUI()
board = Board()
root.mainloop()

Answer 1

通常，一个类包含给定对象的所有方法，因此您将为每个按钮创建一个GUI实例，而GUI（实例）将包含单独该按钮的创建，销毁，恢复等功能虽然你不能因为你摧毁它而拿回一个按钮，但不要忘记它，（并且也无法告诉班级把按钮带回来）。下面的代码说明了以简化方式创建和销毁按钮。

from Tkinter import*

root = Tk()


class GUI():
    def __init__(self, root, x, y):
        self.root=root
        self.create_button(x, y)

    def create_button(self, x, y):
        #Creates buttons
        self.button = Button(root)
        self.button.config(text="%s-%s" % (x, y))
        self.button.config(command=self.go_away)
        self.button.grid(column=x,row=y)

    def create_label(self, info, posit):
        #Creates labels
        self.label = Label(root)
        self.label.config(text=info)
        self.label.grid(column=posit[0],row=posit[1])

    def go_away(self):
        #Makes buttons disappear
        #self.button.grid_forget()
        self.button.destroy()

    def come_back(self):
        #Makes buttons reappear
        self.button.grid()

    def user_input(self,row,column):
        print("Row:", row)
        print("Column:", column)
        self.configure(row,column)
        print(self.button)


class Board():
    def __init__(self):
        self.buttons=[]
        self.create_board()
        Label(root, text="click on a button\nto destroy it",
              bg="lightblue"). grid(row=10, column=0,
              columnspan=3, sticky="nsew")

    def create_board(self):
        for x in range(3):
            for y in range(3):
                self.buttons.append(GUI(root, x, y))
##                cmd = lambda row=y, column=x: self.user_input(row,column)
##                self.create_button("   ", cmd, [x,y])

board = Board()
root.mainloop()

Answer 2

您必须以某种方式保留对稍后要引用的每个窗口小部件的引用。 create button依次将self.button重新绑定到每个按钮，丢失对前一个按钮的引用。相反，create_board应该创建一个3 x 3的按钮数组。像（未经测试的）

之类的东西

def create_board(self):
    self.board = []
    for y in range(3):  # row
        row = []
        for x in range(3):  # column
            mycmd = lambda row=y, column=x: self.user_input(row,column)
            button = Button(root, text="   ", cmd=mycmd)
            button.grid(row = y, column = x)
            row.append(button)
        self.board.append(row)

如何隐藏python中循环创建的各个小部件

代码

2 个答案: