Question

class tkinter_toggle_button():
    def __init__(self):
        self.button = tk.Button(text="Toggle", width=12, relief="raised")
    def MakeCommand(self):
        print('1')
        if self('relief')[-1] == 'sunken':
            button.config(relief="raised")
        else:
            button.config(relief="sunken")
    def MakeButtonToggle(self):
        print('2')
        toggle_btn = tk.Button(text="Toggle", width=12, relief="raised", command=tkinter_toggle_button.MakeCommand)
        return toggle_btn

class UI:
    def MainWindow():
        main_window = tk.Tk()
        togglebutton1 = tkinter_toggle_button()
        togglebutton = togglebutton1.MakeButtonToggle()
        togglebutton.grid(row=0,column=0)
        main_window.mainloop()

UI.MainWindow()

我希望这段代码使用init方法创建一个切换按钮。我需要帮助来了解其他模块的init方法。这是正确的方法吗？该代码的输出是：

按下按钮后：

Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Users\Juan\AppData\Local\Programs\Python\Python37\lib\tkinter\__init__.py", line 1705, in __call__
    return self.func(*args)
TypeError: MakeCommand() missing 1 required positional argument: 'self'

Answer 1

这是您尝试执行的工作版本。该类应使用self.引用内部变量。

import Tkinter

class tkinter_toggle_button():
    def __init__(self, master):
        self.button = Tkinter.Button(master, text="Toggle", width=12, relief="raised", command=self.MakeCommand)
    def MakeCommand(self):
        if self.button.config('relief')[-1] == 'sunken':
            self.button.config(relief='raised')
        else:
            self.button.config(relief='sunken')

class UI:
    def MainWindow(self):
        main_window = Tkinter.Tk()
        togglebutton = tkinter_toggle_button(main_window)
        togglebutton.button.grid(row=0,column=0)
        main_window.mainloop()

ui = UI()
ui.MainWindow()

具有来自另一个模块的对象的init方法

1 个答案: