Unity sample project "Roll a Ball" does not work on iPad (Ball does not move)?

Question

Unity has this sample project "Roll a Ball" at this link: https://unity3d.com/learn/tutorials/projects/roll-ball-tutorial

I have been able to build and make it work 100% well on my Mac. I am able to use the arrow keys on the keyboard to move the ball. Everything works on the Mac platform.

However, when I use the same code to build and deploy this game on my iPad, I notice that the ball does not move at all when I use my fingers to try to move the ball. (The only good thing is that all the cubes are rotating well)

So, my question is if I need to modify the C# script for the ball to make it works for iPad (although that script already works for Mac) ?

Here is the C# script for the ball:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class PlayerController : MonoBehaviour
{

    public float speed;
    public Text countText;
    public Text winText;

    private Rigidbody rb;
    private int count;

    void Start ()
    {
        rb = GetComponent<Rigidbody>();
        count = 0;
        SetCountText ();
        winText.text = "";
    }

    void FixedUpdate ()
    {
        float moveHorizontal = Input.GetAxis ("Horizontal");
        float moveVertical = Input.GetAxis ("Vertical");

        Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);

        rb.AddForce (movement * speed);
    }

    void OnTriggerEnter(Collider other) 
    {
        if (other.gameObject.CompareTag ( "Pick up"))
        {
            other.gameObject.SetActive (false);
            count = count + 1;
            SetCountText ();
        }
    }

    void SetCountText ()
    {
        countText.text = "Count: " + count.ToString ();
        if (count >= 12)
        {
            winText.text = "You Win!";
        }
    }
}

*Interestingly, I have just noticed that the type INPUT has the method "GetTouch()". Maybe, I could try to use that method for iPad ? Initially, I was hoping that the generic code in the C# script above that works for Mac could also work for iPad ? Maybe, my assumption was wrong and I need to write a different set of code with "GetTouch()" for iPad ? OK, I am thinking that is the possible solution, and will try that now... *

PS: BTW, I am using the latest Unity (version 5.5.2f1) and latest XCode (8.2.1) as of Feb 2017. The iOS on my iPad is also the latest (version 10.2.1).

Ignacio Alorre Ignacio Alorre · Accepted Answer · 2017-03-01T11:22:07

I have never create anything for iPad in Unity, but with the description you provided I think the problem is not in your script. I would recommend you instead to check if everything is properly linked in the input Manager (Edit->Project Settings->Input)

https://docs.unity3d.com/Manual/class-InputManager.html

I think the problem is the game is not detecting your inputs from the iPad. You can try to add a constant speed in x axis to the ball, and if it moves, you can focus your efforts in Input Manager.

Additionally, check this link: http://wiki.unity3d.com/index.php?title=Basic_iOs_Input_Tutorial

Unity sample project "Roll a Ball" does not work on iPad (Ball does not move)?

2 Answers