在Unity5中使用C#脚本实现UI的下滑、变色、渐隐渐现效果

一、首先，我们先创建一个Text
    依次选择Component→UI→Text创建一个Text，创建完成后如下：

二、创建完成后，在Project面板点击Create→C# Script，本例命名为InAndFade 
三、编写代码之前，为了确保能够调用到Text类，所以要先手动引入命名空间

using UnityEngine.UI;

 四、完整代码如下

 public class InAndFade : MonoBehaviour
 {
     //渐隐渐现
     public bool Show = true;
     public bool Fade = false;
     public float duration = 2.5f;
     public float timeFromStart = 0f;    //从场景加载开始经过这些时间后再发生
     //向下滑动
     public bool isSlide = true; //是否从上往下滑动
     public float offset = -1.0f;    //偏差为10
     //变色
     public bool isChangeColor = true;
     //等待
     private bool wait = true;
     void Start()
     {
         if (Show && Fade)
         {
             Fade = false;
         }
         else if (!Show && !Fade)
         {
             Show = true;
         }
     }
     IEnumerator Wait()
     {
         yield return new WaitForSeconds(timeFromStart);
     }
     void Update()
     {
         #region 变色代码
         if (isChangeColor)
         {
             Color nowColor = gameObject.GetComponent<Text>().color;
             if (nowColor.r !=  && nowColor.g !=  && nowColor.b != )
             {
                 nowColor.r--;
                 nowColor.g += 2.8f;
                 nowColor.b += 0.9f;
             }
             gameObject.GetComponent<Text>().color = nowColor;
             if (nowColor.g >=  && nowColor.g <= )
             {
                 nowColor.g--;
             }
         }
         #endregion
         #region 滑动代码
         if (isSlide)
         {
             Vector3 initialPos = gameObject.GetComponent<Transform>().position;
             float posProportion = Time.time / duration;
             Vector3 nowPos = new Vector3(initialPos.x, Mathf.Lerp(initialPos.y + offset, initialPos.y, posProportion), initialPos.z);
             gameObject.transform.position = nowPos;
         }
         #endregion
         #region 渐隐渐现代码
         if (wait)
         {
             StartCoroutine(Wait());
         }
         if (Fade)
         {
             if (Time.time > duration)
             {
                 Destroy(gameObject);
             }
             Color newColor = gameObject.GetComponent<Text>().color;
             float proportion = Time.time / duration;
             newColor.a = Mathf.Lerp(, , proportion);
             gameObject.GetComponent<Text>().color = newColor;
         }
         if (Show)
         {
             Color newColor = gameObject.GetComponent<Text>().color;
             float proportion = Time.time / duration;
             newColor.a = Mathf.Lerp(, , proportion);
             gameObject.GetComponent<Text>().color = newColor;
         }
         #endregion
     }
 }