unity reference prefab script it attached to

Unity reference prefab script it attached to how to#

In case 2,3 you may use static variables or singleton pattern.Ĭase 2: public class SceneObject1 : MonoBehaviour Var item = GameObject.FindWithTag('MyTag') Īdd a script to your scene object and store the reference there internal GameObject MyRef Īdd an empty game object (reference manager) in your scene with a script to store all references //assign these in inspector There are many workarounds for this case, most of them involve a static variable.Īssign a Tag to your scene object and then find it by searching through objects var all = FindObjectsOfType() It's because prefabs have a template-like nature and thus are unaware of the scene. Unity does not allow you to reference scene objects to prefabs. Store the reference to the object in a global variable (a public static variable of an appropriate class) so all the instantiated prefabs can access it.By traversing your object hierarchy with transform.parent, transform.GetChild, transform.Find etc.Its variants like FindWithTag or FindObjectOfType (warning, not as slow as Find but still slow).Search for the game object in the Start method of your prefab. GameObject bullet = Instantiate(bulletPrefab, transform.position, transform.rotation) bullet.GetComponent().shooter = gameObject There are several ways to do that.Īttach the reference to the object which instantiates the prefabs and have the spawning script set it on every object it instantiates: If you need them to reference something in the scene, you need to get that reference at runtime. That means they can't rely on the object being present in every scene. Prefabs are supposed to be shared between scenes. But that doesn’t mean we can’t work around it.In the editor, prefabs can only reference other prefabs. Unity’s unique approaches to doing very normal things is always confusing, even for experienced devs. private GameManager _myGameManager // we assign THIS through the inspector instead Now when we instantiate our prefab, we set the public property. I will cover this at a later time public GameManager MyGameManager Let’s go back to our PlayerController and change our private field into a public property: using UnityEngine So how do we workaround this? By using property injection! So your object is a prefab which means you can’t simply drag a scene object into the slot in the inspector. We can assign a GameManager by simply dragging our Scripts object (the one which has the GameManager attached) onto this slot in the inspector! Easy-peasy. This can be achieved by creating a field of the behaviour type that we want to access like so: using UnityEngine The first – and best – way to access another behaviour instance is to already have a direct reference to it. Direct reference through a serialized field There are a few ways we can accomplish this. We need a way to reference our GameManager so that we can increment the Score property.

Internal class PlayerController : MonoBehaviour Let us also assume the premise of your game is that you wish to increment the score whenever the player jumps: using UnityEngine Now let us say you have a PlayerController behaviour, attached to an object named Player. Internal class GameManager : MonoBehaviour This class might contain a public property such as Score: using UnityEngine Let’s say you have a simple behaviour, a GameManager, attached to an object named Scripts.

Unity reference prefab script it attached to how to#

This post is about how to get a reference the traditional way in Unity. Zenject and Ninject are a couple of popular ones. However, there are a few packages available which mimic it and bring this methodology to Unity. Due to the nature of how a MonoBehaviour is instantiated, we cannot have a parametered constructor. Unity makes this very familiar workflow extremely difficult.

If you have worked in other applications of C#, you probably understand the concept of dependency injection on some level. This is inefficient! It means that the more objects you add to your scene, the slower these methods become and it gets even worse if you are calling them multiple times.Ī non-exhaustive list of Find methods to avoid include: Whenever you call a Find method, Unity must traverse your entire scene hierarchy and check every single object until it finds a match and the methods which return arrays will always traverse the entire hierarchy regardless. However, there is always a better solution. Find methods in Unity are an often-tempting solution to referencing a scene object.