如何使用C#访问另一个类(在unity3d中)

这是我的问题：我在c#中有一个播放器类和SwipeDetector类，SwipeDetective类有助于在iPhone上进行识别的垂直滑动触摸。

p.s.我使用的是unity3d，但这是一个与游戏技术相反的编程问题：）

在我的玩家类中，我试图访问SwipeDetector，并找出它是哪一次滑动（向上、向下）。

player.cs:

if(SwipeDetetcor is up){
   print("up");
}

这是SwipeDetector类，它看起来很可怕，但事实并非如此！！

    using UnityEngine;
    using System.Collections;
    public class SwipeDetector : MonoBehaviour {
        // Values to set:
        public float comfortZone = 70.0f;
        public float minSwipeDist = 14.0f;
        public float maxSwipeTime = 0.5f;
        private float startTime;
        private Vector2 startPos;
        private bool couldBeSwipe;
        public enum SwipeDirection {
            None,
            Up,
            Down
        }
        public SwipeDirection lastSwipe = SwipeDetector.SwipeDirection.None;
        public float lastSwipeTime;
        void  Update()
        {
            if (Input.touchCount > 0)
            {
                Touch touch = Input.touches[0];
                switch (touch.phase)
                {
                    case TouchPhase.Began:
                        lastSwipe = SwipeDetector.SwipeDirection.None;
                                            lastSwipeTime = 0;
                        couldBeSwipe = true;
                        startPos = touch.position;
                        startTime = Time.time;
                        break;
                    case TouchPhase.Moved:
                        if (Mathf.Abs(touch.position.x - startPos.x) > comfortZone)
                        {
                            Debug.Log("Not a swipe. Swipe strayed " + (int)Mathf.Abs(touch.position.x - startPos.x) +
                                      "px which is " + (int)(Mathf.Abs(touch.position.x - startPos.x) - comfortZone) +
                                      "px outside the comfort zone.");
                            couldBeSwipe = false;
                        }
                        break;
                    case TouchPhase.Ended:
                        if (couldBeSwipe)
                        {
                            float swipeTime = Time.time - startTime;
                            float swipeDist = (new Vector3(0, touch.position.y, 0) - new Vector3(0, startPos.y, 0)).magnitude;
                            if ((swipeTime < maxSwipeTime) && (swipeDist > minSwipeDist))
                            {
                                // It's a swiiiiiiiiiiiipe!
                                float swipeValue = Mathf.Sign(touch.position.y - startPos.y);
                                // If the swipe direction is positive, it was an upward swipe.
                                // If the swipe direction is negative, it was a downward swipe.
                                if (swipeValue > 0){
                                    lastSwipe = SwipeDetector.SwipeDirection.Up;
                                    print("UPUPUP");
                                }
                                else if (swipeValue < 0)
                                    lastSwipe = SwipeDetector.SwipeDirection.Down;
                                // Set the time the last swipe occured, useful for other scripts to check:
                                lastSwipeTime = Time.time;
                                Debug.Log("Found a swipe!  Direction: " + lastSwipe);
                            }
                        }
                        break;
                }
            }
        }
    }

// Player.cs
public SwipeDetector MySwipeDetector;
void Update() 
{
    if (MySwipeDetector.lastSwipe == SwipeDirection.Up) { .... }
}

// SwipeDetector.cs
private static SwipeDetector _Instance;
public static SwipeDetector Instance { get { return _Instance; } }
void Awake()
{
    if (_Instance!= null) throw new Exception(...);
    _Instance= this;
}

// Player.cs
void Update()
{
    if (SwipeDetector.Instance.lastSwipe == SwipeDirection.Up) { .... }
}

// player.cs
public SwipeDetector swipeDetector;

// you can now use it like this:
if(swipeDetector.lastSwipe == SwipeDetector.SwipeDirection.UP)
{
    // do something
}