2 same Scripts w/ GetComponent : one works, one doesn't

Questions & Answers
1

I want to make an application for both Standalone version and Android version, in which i’m trying to enable Mesh Renderer of an object attached to its parent object when i press/touch button.

edit:
Sorry if i wasn’t clear. So this is the case, there is an object called Box A which has child box B. The renderer of box B is disabled at start. When raycast from main camera hit the box A, and then i touch the button (in which the script is attached to), the render of box B should be enabled. That’s the idea which runs perfectly in pc-version.

In the pc-version i attach this script in the main camera and it works superb

public class RayCast : MonoBehaviour {
    public float rayDistance;
    RaycastHit hit;

void Update () {
        Debug.DrawRay (this.transform.position, this.transform.forward * rayDistance,
                       Color.blue);
        RaycastHit hit;
if (Physics.Raycast (this.transform.position, this.transform.forward, out
                             hit, rayDistance, 1<<8)) {

                     
            if (Input.GetButtonDown ("Fire1")){
                Debug.Log (hit.collider.gameObject.name);

             
                foreach (Transform child in transform){
                 
                    Renderer renderChild = hit.collider.transform.GetChild(0).GetComponent<Renderer>();
                    renderChild.gameObject.GetComponent<Renderer>().enabled = true;

                }
            }
        }
    }
}

And in the android version I attach at the UI-button a similar script as follow

public class Funktionen : MonoBehaviour {
    RaycastHit hit;
    public float rayDistance = 5.0f;

    private Camera cam;
void Awake () {
        cam = GameObject.FindGameObjectWithTag ("MainCamera").GetComponent <Camera>();
    }

    void Update () {
        Debug.DrawRay (cam.transform.position, cam.transform.forward * rayDistance,
            Color.blue);
        RaycastHit hit;
    }

    public void Shooting () {

    if (Physics.Raycast (cam.transform.position, cam.transform.forward, out
        hit, rayDistance, 1<<8)) {

        foreach (Transform child in transform){

           Renderer renderChild = hit.collider.transform.GetChild(0).GetComponent<Renderer>();
           renderChild.gameObject.GetComponent<Renderer>().enabled = true;
            }     

            Debug.Log (hit.collider.gameObject.name);
        }
    }
}

and this script doesn’t work as i can’t enable Renderer when i touch the button. what strange is, the debug works and it brought me the name of the parent object each time i touch the button.

So what did i miss?

edit:
I added this line in the 2nd script and it brings me the name of the child. but why can’t i enable the renderer?

Debug.Log (hit.collider.transform.GetChild(0).name);
2

I just found the solution for this problem. I commented out this line and now it works.

foreach (Transform child in transform){
}

but I don’t know why it caused the GetComponent ().enable not working. can someone maybe explain?

3

Hello! Just got into a problem when I couldn’t GetComponent() from Transfrom component of the same object, while it was INACTIVE.

Transform expandingGroupTransform = this.gameObject.transform.GetChild(1);
		Debug.Log (expandingGroupTransform.gameObject.name);
		GameObject expandingGroup = expandingGroupTransform.GetComponent<GameObject> ();
		Debug.Log (expandingGroup.name);

First Debug.Log was showing the right name of object, while second was not showing anything.
I just wrote next thing and it helped:

Transform expandingGroupTransform = this.gameObject.transform.GetChild(1);
		Debug.Log (expandingGroupTransform.gameObject.name);
		GameObject expandingGroup = expandingGroupTransform.gameObject;
		Debug.Log (expandingGroup.name);

Both Debug.Logs showed correct name. Looks like Transform component already holds GameObject component and we can scip GetComponent() part.