Unity: Mobile Touch ControlsMoving a Character from Left to Right

Preface

While working on my latest game, I found it very difficult to find a tutorial that explained how to make a character move by tapping either the left or right side of the screen. My first strategy was to create two buttons, but then I discovered there is no press and hold function with native Unity buttons. So instead I had to build buttons to give you a visual reference (press down effect) and then I use the screens width as a way to detect finger position. Overall it ended up being very simple to do and I share that with you in this video.

Full Video Walkthrough


Source Code

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

public class Movement : MonoBehaviour {
	//variables
	public float moveSpeed = 300;
	public GameObject character;

	private Rigidbody2D characterBody;
	private float ScreenWidth;


	// Use this for initialization
	void Start () {
		ScreenWidth = Screen.width;
		characterBody = character.GetComponent<Rigidbody2D>();
	}
	
	// Update is called once per frame
	void Update () {
		int i = 0;
		//loop over every touch found
		while (i < Input.touchCount) {
			if (Input.GetTouch (i).position.x > ScreenWidth / 2) {
				//move right
				RunCharacter (1.0f);
			}
			if (Input.GetTouch (i).position.x < ScreenWidth / 2) {
				//move left
				RunCharacter (-1.0f);
			}
			++i;
		}
	}
	void FixedUpdate(){
		#if UNITY_EDITOR
		RunCharacter(Input.GetAxis("Horizontal"));
		#endif
	}

	private void RunCharacter(float horizontalInput){
		//move player
		characterBody.AddForce(new Vector2(horizontalInput * moveSpeed * Time.deltaTime, 0));

	}
}

Feedback is appreciated

As always if you have a better way of doing it, please let me and this community know in the comments.

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