CODEWITHSUNDEEP
c#unity-game-engineevents
user1068477
user1068477

Reputation:

Programmatically define execution order of scripts

By programmatically adding scripts to a given game object, will these scripts execute in the order they were added? Will their events run in the order they were added?

void Awake ()
{
    gameObject.AddComponent("Script_1");
    gameObject.AddComponent("Script_2");
}

Upvotes: 17

Views: 18168

Answers (5)

gresolio
gresolio

Reputation: 1064

Short answer: No. But you can set Script Execution Order in the settings (menu: Edit > Project Settings > Script Execution Order) or change it from code:

// First you get the MonoScript of your MonoBehaviour
MonoScript monoScript = MonoScript.FromMonoBehaviour(yourMonoBehaviour);
 
// Getting the current execution order of that MonoScript
int currentExecutionOrder = MonoImporter.GetExecutionOrder(monoScript);
 
// Changing the MonoScript's execution order
MonoImporter.SetExecutionOrder(monoScript, x);

  1. Script Execution Order manipulation

  2. Changing Unity Scripts Execution Order from Code

  3. Change a script's execution order dynamically (from script)

p.s. This answer was written a long time ago, before DefaultExecutionOrder existed. Unless you are writing some editor tool to manipulate the execution order, DefaultExecutionOrder attribute may be more simple/suitable solution.

Upvotes: 20

Zandry
Zandry

Reputation: 11

You can also achieve this within editor scripts. Add class which initialized on load and set the MonoScripts Order dynamically.

[InitializeOnLoad]
public class SetExecutionOrder{

    static SetExecutionOrder(){
        MonoScript[] scripts = (MonoScript[])Resources.FindObjectsOfTypeAll(typeof(MonoScript));
        int order = -100;  //Set this to whatever order you want
        foreach(MonoScript script in scripts){
            if(script.GetClass() == typeof(MyMonoScriptType)){  //The type of the MonoScript who's order you want to change
                MonoImporter.SetExecutionOrder(script , order);
            }
        }
    }

}

This will also show the script within the script execution order window.

Upvotes: 1

ghiboz
ghiboz

Reputation: 8003

you can use the attribute:

[DefaultExecutionOrder(100)]
public class SomeClass : MonoBehaviour
{
}

Upvotes: 32

Houston Wong
Houston Wong

Reputation: 51

Some of the assets I've seen in the store, for example Cinemachine, set the executionOrder property in the .meta file (for example, MyMonoBehavior.cs.meta). I've tested and this indeed works (for example, change it from 0 to 200 then right-click and Reimport). It seems that the meta files are preserved in the package, so if you are distributing your asset, putting your asset package in the store with meta should work (https://docs.unity3d.com/Manual/AssetPackages.html).

Upvotes: 5

maZZZu
maZZZu

Reputation: 3615

As mentioned here

By default, the Awake, OnEnable and Update functions of different scripts are called in the order the scripts are loaded (which is arbitrary). However, it is possible to modify this order using the Script Execution Order settings.

Reference to Execution Order Setting can be found here

Upvotes: 1

Related Questions