Tkinter:有没有办法默认选中复选框? [英] Tkinter: is there a way to check checkboxes by default?

问题描述

我有这段代码可以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，默认情况下未选中此复选框，我正在寻找一种方法来检查它.

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

到目前为止我已经尝试插入

So far I have tried to insert

CheckVar.set(1)

就在 CheckVar 之后，但它不起作用.

right after CheckVar but it didn't work.

感谢您的帮助

这是我的完整代码.当我运行它时，该框仍未选中

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

你的 CheckVar 是一个局部变量.它正在收集垃圾.将其另存为对象属性.此外，您可以一步创建变量并对其进行初始化:

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)

您也可以使用复选按钮的select功能:

You can also use the select function of the checkbutton:

self.checkbutton.select()

这篇关于Tkinter:有没有办法默认选中复选框?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！