How can a make on click jump small but if a person hold button jump higher. is for mobile.

How can a make on click jump small but if a person hold button jump higher. im making a 2d platform game for android. I want to make my player jump if user click the button but if he holds the button jump higher.

Ah man what a massive pain that was! Spent an hour downloading all the Android SDK stuff then another hour trying to get my PC to recognise my phone! Apparently a known issue with some Samsung phones, in the end I just went back to my laptop!

Anyway it looks like Touch.deltaTime was a bad call, it acts real strange so I went back to the more dependable Time.deltaTime, this script works though…

public class ButtonMovement : MonoBehaviour {

	public Rigidbody2D playerRigidbody;
	private float jumpHeight = 2f;
	private Touch touch;
	private bool isGrounded;
	//public Text myText;

	private float myTouchDT = 0f;

	// Use this for initialization
	void Start () {
		//myText.text = "Started";
	}

	// Update is called once per frame
	void Update () {
		if (Input.touchCount > 0) {
			touch = Input.GetTouch(0);
			myTouchDT = myTouchDT + Time.deltaTime;
			//myText.text = myTouchDT.ToString();
		}

		if (touch.phase == TouchPhase.Ended && myTouchDT > 0f && isGrounded) {
			if (myTouchDT < 1.0f) {
				playerRigidbody.AddForce (Vector2.up * jumpHeight, ForceMode2D.Impulse);
				//myText.text = ("Samll = " + myTouchDT.ToString());
		
			} else if (myTouchDT >= 1.0f) {
				playerRigidbody.AddForce (Vector2.up * jumpHeight * 6, ForceMode2D.Impulse);
				//myText.text = ("Big = " + myTouchDT.ToString());
			}
			myTouchDT = 0f;
		}
	}

	void OnCollisionEnter2D(Collision2D col)
	{
		if (col.gameObject.name == "ground")
			isGrounded = true;
	}

	void OnCollisionExit2D(Collision2D col)
	{
		if (col.gameObject.name == "ground")
			isGrounded = false;
	}
}

You can ignore the Text stuff I just used it for debugging on the actual phone.

EDIT - forgot to say your ground needs to be called ground for the collision detection to work properly.