Game & Web Design

▌首先建立一個腳本，加入下列程式碼

using UnityEngine;
using System.Collections;

//增加觸碰操作功能，控制攝影機運動
public class Touch : MonoBehaviour
{

	//紀錄手指觸碰位置
	Vector2 m_screenPos = new Vector2 ();

	void Start ()
	{
		//允許多點觸碰
		Input.multiTouchEnabled = true;
	}
	
	
	void Update ()
	{
		//判斷平台
		#if !UNITY_EDITOR && (UNITY_IOS || UNITY_ANDROID)

		MobileInput ();

		#else

		DeskopInput();

		#endif
	}
}

1. 我們在 Update 中判斷平台是在"電腦"還是"手機"，平台相關可以參考這個 官方Documentation
2. 分別加入MobileInput 和 DeskopInput 兩個方法處理畫面控制

 ▌在DeskopInput 增加程式碼

void DeskopInput ()
{
	//紀錄滑鼠左鍵的移動距離
	float mx = Input.GetAxis ("Mouse X");
	float my = Input.GetAxis ("Mouse Y");

	float speed=6.0f;

	if (mx != 0 || my != 0) {

		//滑鼠左鍵
		if (Input.GetMouseButton (0)) {

                //移動攝影機位置
			Camera.main.transform.Translate (new Vector3 (-mx * Time.deltaTime*speed, -my * Time.deltaTime*speed, 0));
		}
	}
}

1.  獲得X軸與Y軸的位置，並控制攝影機位置

▌在MobileInput 增加程式碼

void MobileInput ()
{
	if (Input.touchCount <= 0)
		return;

		//1個手指觸碰螢幕
		if (Input.touchCount == 1) {

			//開始觸碰
			if (Input.touches [0].phase == TouchPhase.Began) {

				//紀錄觸碰位置
				m_screenPos = Input.touches [0].position;

				//手指移動
			} else if (Input.touches [0].phase == TouchPhase.Moved) {

				//移動攝影機
				Camera.main.transform.Translate (new Vector3 (-Input.touches [0].deltaPosition.x * Time.deltaTime, -Input.touches [0].deltaPosition.y * Time.deltaTime, 0));
			}
		

		//手指離開螢幕
		if (Input.touches [0].phase == TouchPhase.Ended && Input.touches [0].phase == TouchPhase.Canceled) {

			Vector2 pos = Input.touches [0].position;

			//手指水平移動
			if (Mathf.Abs (m_screenPos.x - pos.x) > Mathf.Abs (m_screenPos.y - pos.y)) {
				if (m_screenPos.x > pos.x) {
					//手指向左滑動
				} else {
					//手指向右滑動
				}
			} else {
				if (m_screenPos.y > pos.y) {
					//手指向下滑動
				} else {
					//手指向上滑動
				}
			}
		}

            //攝影機縮放，如果1個手指以上觸碰螢幕
	} else if (Input.touchCount > 1) {

		//記錄兩個手指位置
		Vector2 finger1 = new Vector2 ();
		Vector2 finger2 = new Vector2 ();

		//記錄兩個手指移動距離
		Vector2 move1 = new Vector2 ();
		Vector2 move2 = new Vector2 ();

		//是否是小於2點觸碰
		for (int i=0; i<2; i++) {

			UnityEngine.Touch touch = UnityEngine.Input.touches [i];

			if (touch.phase == TouchPhase.Ended)
				break;

			if (touch.phase == TouchPhase.Moved) {
				//每次都重置
				float move = 0;

				//觸碰一點
				if (i == 0) {
					finger1 = touch.position;
					move1 = touch.deltaPosition;
					//另一點
				} else {
					finger2 = touch.position;
					move2 = touch.deltaPosition;

					//取最大X
					if (finger1.x > finger2.x) {
						move = move1.x;
					} else {
						move = move2.x;
					}

					//取最大Y，並與取出的X累加
					if (finger1.y > finger2.y) {
						move += move1.y;
					} else {
						move += move2.y;
					}

					//當兩指距離越遠，Z位置加的越多，相反之
					Camera.main.transform.Translate (0, 0, move * Time.deltaTime);
				}
			}
		}//end for
	}//end else if 
}//end void

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