CODEWITHSUNDEEP
c#androidunity-game-enginemulti-touch
Babak Gohardani
Babak Gohardani

Reputation: 156

unity touch control with UI image

I have a written a multi-touch system that works correctly with objects that have collider2d (use them as buttons) and I can move the player in my Android phone.

But when I use an image from the UI canvas system and add this code to the image, it doesn't detect anything.

Here is my code:

using UnityEngine;
using System.Collections;

public class Jump : MonoBehaviour {

    public float jumpForce;
    private GameObject hero; 

    void Start () {
        hero = GameObject.Find("hero"); 
    }

    void Update () {

        if (Input.touchCount > 0)
        {
            Touch[] myTouches = Input.touches;
            for(int i = 0; i < Input.touchCount; i++)
            {
                if(Input.GetTouch(i).phase == TouchPhase.Began)
                {
                    CheckTouch(Input.GetTouch(i).position, "began");
                }
                else if (Input.GetTouch(i).phase == TouchPhase.Ended)
                {
                    CheckTouch(Input.GetTouch(i).position, "ended");
                }
            }
            
        }
    }

    void CheckTouch (Vector3 pos, string phase)
    {
        
        Vector3 wp = Camera.main.ScreenToWorldPoint (pos);
        Vector2 touchPos = new Vector2 (wp.x, wp.y);
        
        Collider2D hit = Physics2D.OverlapPoint(touchPos);

        if(hit.gameObject.name == "JumpButton" && hit && phase == "began")
        {
            hero.rigidbody2D.AddForce(new Vector2(0f, jumpForce));  //Add jump force to hero
            audio.Play ();
        }
    }
}

Upvotes: 0

Views: 3069

Answers (2)

Max Yankov
Max Yankov

Reputation: 13327

You don't have to work with touches yourself anymore. Just implement IPointerClickHandler interface and make sure you have EventSystem and an appropriate raycaster present in the scene.

Upvotes: 1

joreldraw
joreldraw

Reputation: 1736

For Graphics items in canvas you need to use GraphicRaycaster instead of Physics2D using UnityEngine.UI

Upvotes: 2

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