在 Tkinter 上显示标签一段固定的时间
问题描述
我正在使用 Tkinter 在 Python 2.7 中创建一个 GUI 应用程序.我有这段代码:
I'm creating a GUI application in Python 2.7 using Tkinter. I have this piece of code:
vis=Label(pur,text='Purchase Added successfully',font=(8))
vis.place(x=150,y=460)
我想知道是否有任何方法可以在有限的时间(约 3 秒)内显示已成功购买"标签，然后它会消失.这是因为我有兴趣在当前购买之后添加新的购买"，并且不希望成功消息重叠.
I wanna know if there's any way to display the Label 'Purchase Added Successfully' for a limited amount of time(~3 seconds) and then it would disappear. This is because I'm interested in adding a new 'purchase' after the current one, and don't want the success messages to overlap.
解决方案
根据项目模式有很多种方法，都基于语法:
There are many ways depending on the project pattern, all based on the syntax :
vis=Label(pur,text='Purchase Added successfully',font=(8))
vis.place(x=150,y=460)
vis.after(3000, function_to_execute)
彻底毁灭
如果您不想怀疑标签是否已创建、隐藏或为空，并且主要避免可能的内存泄漏(感谢 Bryan Oakley 评论):
If you don't want to wonder whether the label is already created, hidden or empty, and mostly avoid possible memory leaks (thanks to Bryan Oakley comment):
vis.after(3000, lambda: vis.destroy() )
但是你需要为每次购买创建一个全新的Label.
But then you need to create a fresh new Label for every purchase.
捉迷藏
以下方法允许在不破坏标签的情况下禁用标签的显示.
The following method allows to disable the display of the Label without destroying it.
vis.after(3000, lambda: vis.place_forget() )
#vis.after(3000, lambda: vis.grid_forget() ) # if grid() was used
#vis.after(3000, lambda: vis.pack_forget() ) # if pack() was used
然后您可以使用 vis.place(x=150,y=460)
文本橡皮擦
另一种方式，可能不太有趣，除非您更喜欢在容器小部件中保留一个空标签:
Another way, maybe less interesting, unless you prefer keeping an empty Label in the container widget:
vis.after(3000, lambda: vis.config(text='') )
(请注意，您可以将文本替换为 vis.config(text='blabla') 以便下次购买)
(Note that you can replace the text with vis.config(text='blabla') for the next purchase)
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