About Update Order in child and parent question

Questions & Answers
1

Update() maybe called at “random” order.
But if a gameobject is a other gameobject’s child,is the Update order predicable?

First called update in all children and then called update in their parent as the same as Start()?

Very thanks!

2

Don’t bet your life on this: I created a simple test script and attached it to several objects. They seemed to follow the “women and children first” rule, but things changed when I added two new children to the parent: another “external” object entered the order, messing things up. The script I added to the objects is:

static var updateOrder = 0;
var order = 0;

function Update(){
	order = ++updateOrder;
}

function LateUpdate(){
	updateOrder = 0;
}

I just watched the order variable of each object in the Inspector to learn the sequence its Update was called.

You can define scripts execution order in Unity 3.4: select the script in the Project view and click the Execution Order button in the Inspector.

I honestly don’t know how multiple instances of the same script are ordered, but hope this may help solving your problem.