Question When I sub a method to a Unity Button OnClick event, do I need to unsubscribe it as well?

When I sub a method to a Unity Button OnClick event, do I need to unsubscribe it as well via code?

 

According to my experience, when using Lua code to register the listener, you must cancel the listener, otherwise C# still has a delegate pointing to a function in the Lua virtual machine.
Check this to prevent calling these invalid delegates after the virtual machine is released (They are invalid because the virtual machine on which the Lua function is referenced has been released.) from causing exceptions or even crashes.

If you only use C# code to subscribe to events, I think it is similar to adding events in the Inspector panel, so it can be cleared when the entity is destroyed.
It is good and harmless to unsubscribe from events that are not required. There are always strange special circumstances that trigger some events by mistake.

 

Looking through the documentation, there is a RemoveListener() method for UnityEvents.
Didn't know about it, but this is what I was looking for. Thanks.