Start vs Awake vs OnEnable (Unity Tutorial)

In this Unity tutorial we're going to look at the differences between the Start, Awake, and OnEnable methods.
The project files are available to our patrons here:
► / 62287013
Help support our work:
► Patreon: / ketragames
► Ko-fi: ko-fi.com/ketragames
Follow us:
► Ketra Games: www.ketra-games.com
► Patreon: / ketragames
► Twitter: / ketragames
► Facebook: / ketragames
Introduction - 0:00
Awake Method Overview - 0:19
Start Method Overview - 0:43
OnEnable Method Overview - 1:06
Examples - 1:34
Summary - 4:54
#KetraGames #LearnUnity #UnityTutorials #UnityTips

[@sibasisrath6774]

Crisp, short and sweet explanation. Thank you for the demonstration and example.

[@andrewmettler2228]

More videos like this please! Too often I feel like all I'm doing when I follow a tutorial is just copying what the video says without really learning anything. Stuff like this is so helpful for understanding how and why things are done the way they're done. Thank you!

[@KetraGames]

Excellent, great to hear 😊

[@thesilentwisp]

This is huge. I've always wondered about this but haven't seen any content explaining it.

[@KetraGames]

Thanks for this. Glad it was useful 😊

[@bcdeaton2520]

Ketra Games are the best tutorials!

[@KetraGames]

Thanks for this comment 😊

[@gazzer4461]

Thanks for the tutorial!
I've recently been enjoying your Platformer tutorials as well. Really appreciate the time and effort you put into them.

[@KetraGames]

Great, thank you 😊

[@crystalape2195]

perfect timing, i needed this and i didnt know i did! thank you

[@KetraGames]

Great to hear 😊

[@qwertz3813]

Thanks!

[@KetraGames]

👍😊

[@pneuma-studios2036]

These three methodes are extremly usefull once you know how and when to use them ^^

[@KetraGames]

👍😊

[@vitaly768]

This tutorial is awesome! Thank you☺

[@KetraGames]

Thanks for this comment 😊

[@ani-gamer320]

Op 🔥❤️❤️

[@KetraGames]

👍😊

[@alessiodibella2003]

Very useful! Thank you! :D

[@KetraGames]

Glad you found it helpful 😊

[@jeremiasp314]

¡Gracias!

[@fmproductions913]

Nice showcase!
There is a handy flowchart on event functions I think every Unity dev shoud be aware of (for people reading this - the Execution Order of Event Functions):
docs.unity3d.com/Manual/ExecutionOrder.html
It's also possible to adjust the oder in which the same event methods are called for each object by using a specific script execution order. i'm not sure if there are methods that are excempt from this functionality though:
docs.unity3d.com/Manual/class-MonoManager.html
+ there is an attribute that can be used above the MonoBehaviour class definition to set up a standard execution order for the Behaviour: [DefaultExecutionOrder(x)] with x being the execution order priority - lower values are called earlier, higher values later
I think it's not uncommon to implictly have dependecies where one Start method needs to be called before the other one to avoid errors, and sometimes the order in which the start methods are called is correct in the editor. But there is no guarantee and I think it might be different in builds. So setting up references and calling methods in the right event methods is definitely important. Awake for initialization for all the data/references of the own object and Start to gather references and run logic on other objects for example.

[@KetraGames]

Thanks for sharing this 😊

[@holo3492]

pls make a video how to make inventory...thx 😁😁

[@Montazeran8]

❤❤❤

[@KetraGames]

💗

[@sorokan6036]

I was always wondering what is the best place to setup listening to other scripts' events ( "SomeClass.OnSomeEvent += HandleSomeEvent"). I usually assume, that classes can actually "do" stuff - like calling an event - as early as the Start()-Method. Therefore it makes sense to me, to make other Classes start listen to events in either their Awake() oder OnEnable() methods. Is there any particular advantage of using one over the other? What would be your recommendation?

[@KetraGames]

Hi, good question. If your objects can be enabled and disabled during the lifetime of the game then I'd recommend subscribing to the events in OnEnable and unsubscribing in OnDisable. That way you won't be handling the events when the object is disabled.