RequireComponent for a GameObject Variable

I am doing this verification for a gameobject

Code (csharp):

1. public class ElementManager : MonoBehaviour {
2.  
3.     public GameObject prefab;
4.  
5.     private void Start() {
6.         if (this.prefab == null || this.prefab.GetComponent<MyScript>() == null)
7.                      this.enabled = false
8.     }
9. }

Can I use something like RequireComponent but on a public variable ?

Getting a compilation error and allow me to not check those conditions all the time ?

Thanks in advance

 

i think you'll have to nest those two... checking the prefab is null, then checking if the prefab has the component it needs (which will error if the prefab is null).

psuedo

Code (csharp):

1.  
2. if(prefab==null)
3. {
4. if(prefab.component == null)
5. {
6. }
7. }
8.  

 

Nesting isn't needed because the second operand will never be evaluated if the first operand is true. It's called "short-circuit evaluation." The opposite applies to the operator, i.e. if the first operand is false, then the second operand will not be evaluated.

 

You can enforce your type as variable instead of GameObject.

Code (csharp):

1. public class ElementManager : MonoBehaviour
2. {
3.     public MyScript prefab;
4.  
5.     private void Start()
6.     {
7.         if (this.prefab == null)
8.             this.enabled = false
9.     }
10. }

Is that what you need?

 

Thanks for your answer.
This is better but I do need the GameObject because I want to instantiate it.

 

Code (csharp):

1.  
2. prefab.gameObject;
3.  

 

You should still be able to instantiate via a component reference:

Code (csharp):

1.  
2. public class ElementManager : MonoBehaviour
3. {
4.     public MyScript prefab;
5.  
6.     private void Start()
7.     {
8.         if (prefab == null)
9.             enabled = false;
10.     }
11.  
12.     private void Foo() {
13.         MyScript prefabInstance = Instantiate(prefab) as MyScript;
14.     }
15. }
16.  

 

Wow! This is very powerfull.

I didn't think I could give a prefab that would be hold by his script in a public variable and keep the prefab components.

I don't know how UnityScripts can do that ^^

Thanks for your help anyway!

It's a great community