The cube does not rotate with Vuforia virtual button in Unity3d

Question

I added the cube on the image target of Vuforia. I also added the Vuforia virtual button on the image target. Now I want to rotate the cube by pressing virtual button. For this purpose I implemented the following script.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Vuforia;

public class rotate : MonoBehaviour, IVirtualButtonEventHandler {

    public GameObject vbtn;
    public GameObject cube;
    public Renderer rend;

    // Use this for initialization
    void Start () {

        vbtn = GameObject.Find ("virtualbtn5");
        vbtn.GetComponent<VirtualButtonBehaviour> ().RegisterEventHandler (this);
        cube = GameObject.Find ("Cube");
        rend = cube.GetComponent<Renderer>();   
    }

    public void OnButtonPressed(VirtualButtonBehaviour vb){

        Debug.Log ("Button pressed");
        cube.transform.Rotate (new Vector3(0,Time.deltaTime*1000,0));
        rend.material.color = Color.blue;

    }

    public void OnButtonReleased(VirtualButtonBehaviour vb){

        Debug.Log ("Button released");
        rend.material.color = Color.red;
    }       

}

The button seems to be working because the Debug.Log ("Button pressed"); and rend.material.color = Color.blue; statements in onButtonPressed function are working fine. But cube.transform.Rotate (new Vector3(0,Time.deltaTime*1000,0)); for rotating cube does not work.

Simple is that the button can change the color of the cube but it does not rotate the cube.

Answer 1

The button is behaving just as a normal button would. It is only clicking once so you probably do have a very small change to the y rotation but it is not continuing to rotate over time.

Two ways you can fix. you can use a bool to trigger the method in a update. Something like bool beginRotate.

bool beginRotate = false;

 public void OnButtonPressed(VirtualButtonBehaviour vb){

    Debug.Log ("Button pressed");
    beginRotate = true;
}


void Update(){

if(beginRotate)
cube.transform.Rotate (new Vector3(0,Time.deltaTime*1000,0));

}

Or another way would be to call a COroutine on button press.

 public void OnButtonPressed(VirtualButtonBehaviour vb){

 Debug.Log ("Button pressed");
 StartCoroutine(RotateCube());
}

IEnumerator RotateCube()
{             
    cube.transform.Rotate(new Vector3(0, Time.deltaTime * 1000, 0));
    yield return new WaitForSeconds(0.01f);   
}