Tkinter：默认情况下，有没有一种方法可以选中复选框？ [英] Tkinter: is there a way to check checkboxes by default?

问题描述

我有这段代码将创建一个简单的复选框：

I have this piece of code that will create a simple checkbox :

from Tkinter import *

CheckVar = IntVar()
self.checkbutton = Checkbutton(self.root, text = "Test", variable = CheckVar)

但是默认情况下此复选框处于未选中状态，我正在寻找一种检查方法。

However this checkbox in unchecked by default and I'm searching for a way to check it.

到目前为止，我一直在尝试插入

So far I have tried to insert

CheckVar.set(1)

紧接CheckVar，但没有用。

right after CheckVar but it didn't work.

感谢您的帮助

编辑：这是我的完整代码。当我运行它时，仍未选中该框

Edit : here is my full piece of code. When I run it, the box is still unchecked

from Tkinter import *

class App():
    def __init__(self, root):   
        self.root = root
        CheckVar = IntVar()
        CheckVar.set(1)
        self.checkbutton = Checkbutton(self.root, text = "Test", variable = CheckVar)
        self.checkbutton.grid(row=0, column=0,)


root = Tk()
app = App(root)
root.mainloop()

推荐答案

您的 CheckVar 是局部变量。它正在收集垃圾。将其另存为对象属性。同样，您可以创建变量并一步一步将其初始化：

Your CheckVar is a local variable. It's getting garbage collected. Save it as an object attribute. Also, you can create the variable and initialize it all in one step:

self.CheckVar = IntVar(value=1)
self.checkbutton = Checkbutton(..., variable = self.CheckVar)

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