How to execute a function (part of code) when an object becomes active?

Question

Unity

Good afternoon friends. There are 6 objects of type UI.Panel, each of them has the same script.
They are all disabled by default. When they become active, I need them to perform a function once.
If I throw all this into the Start () method, then only once it happens. And it is necessary for me, when each time there is an activation, that the function was executed. As the action progresses, these panels are activated and deactivated.
Here at each activation how to execute the function? Thanks for your help .

Answer 1

You need the OnEnable function .
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