Modifying the Transform of a GameObject

Questions & Answers
1

I’m trying to make a simple thing with the Transform component of one of my GameObjects. To do so I added a script to it and added the following code:

using UnityEngine;
using System.Collections;

public class CameraController : MonoBehaviour {

	private GameObject gameObject;

	public void Start () {
		this.gameObject = GameObject.Find("Main Camera");
	}
	
	public void Update () {
		this.ManageUserInput();
	}

	private void ManageUserInput()
	{
		if (Input.GetKey(KeyCode.W))
		{
			Transform gameObjectTransform = this.gameObject.GetComponent<Transform>();
			gameObjectTransform.position = new Vector3(
				gameObjectTransform.position.x,
				gameObjectTransform.position.y,
				gameObjectTransform.position.z - 0.5);
		}
	}
}

As you can see it’s nothing that smart, but I whenever I run it I get the following error:

error CS1612: Cannot modify a value type return value of `UnityEngine.Transform.position'. Consider storing the value in a temporary variable

Can someone explain me why it doesn’t work?

Thanks in advance.

2

Maybe rewrite you function ManageUserInput:

 public void ManageUserInput() {
  if (Input.GetKey(KeyCode.W)) {
   //First this.transform - reference for current transform of object
   //Second, for CSharp wrong write value 0.5, change to 0.5f
   this.transform.position = new Vector3(this.tranform.position.x,
        this.tranform.position.y, this.transform.position.z - 0.5f);
  }
 }

I hope that it will help you.