Single instance of class

Question

Dean Phils 2019-7-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470303-single-instance-of-class

编辑： Andreas Justin 2024-2-20

Hello all! I have just started learning MATLAB and am exploring the OOPS concepts in it. Can someone guide me how to create a class and limit it with only one instance? Also can someone tell me where one can use it

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Chirag Nighut 2019-7-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/470303-single-instance-of-class#answer_382010

In order to limit a single instance of a class you can use the persistent variables. Such type of classes are called Singleton Class. Such classes can be used

When you wish to create a single client for connecting a server.
Handle for a GUI

Following link should help you understand the singleton class and also its implementation:

https://in.mathworks.com/matlabcentral/fileexchange/24911-design-pattern-singleton-creational

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Andreas Justin 2024-2-20

编辑：Andreas Justin 2024-2-20

The persistent variables will be reinstantiated if you change the code of a class containing said variables. Even tough you might only change a comment somewhere within the source file (as of R2024a-pre).

Is mlock a valid way to prevent this behaviour?

Or is a constant property the better way?

请先登录，再进行评论。