常用自制脚本（一）：透明度统一修改

using UnityEngine;
using System.Collections;
using UnityEngine.UI;
/// <summary>
/// User interface alpha ctrl.
/// 统一控制图片的透明度
/// </summary>
public class UIAlphaCtrl : MonoBehaviour {
        Image[] images;
        Text[] texts;
        Color[] c_Images;
        Color[] c_Texts;

	void Awake () {
                GetChildren ();  
	}
        void GetChildren(){                
                images = GetComponentsInChildren<Image>();
                texts = GetComponentsInChildren<Text> ();
                c_Images = new Color[images.Length];
                c_Texts = new Color[texts.Length];
                for (int i = 0; i < images.Length; i++) {
                        c_Images [i] = images [i].color;
                }
                for (int i = 0; i < texts.Length; i++) {
                        c_Texts [i] = texts [i].color;
                }
        }
        public void ChangeAlpha(float alpha){                
                for (int i = 0; i < images.Length; i++) {
                        c_Images [i].a = alpha;
                        images [i].color = c_Images [i];
                }
                for (int i = 0; i < texts.Length; i++) {
                        c_Texts [i].a =alpha;
                        texts [i].color = c_Texts [i];
                }
        }
}

　注意：

　　将目标UI归纳到一个对象下，并绑该脚本