新建了一個帶mask的prefab，加上代碼只需要將圖片prefab、按鈕prefab和所想添加的圖片

拖進去會自動生成按鈕，滑動速度可以隨意調time，滑動效果用itween實現的，所以需要加上itween插件

效果如下：（圖片是我最愛的馬路小天使（ˉ﹃ˉ））

附上代碼

 1 using UnityEngine;
 2 using System.Collections.Generic;
 3 using UnityEngine.UI;
 4 
 5 public class Mask : MonoBehaviour {
 6 
 7     public List<Sprite> sprite = new
 
 List<Sprite>();
 8     List<GameObject> image=new List<GameObject >();
 9     public GameObject pic;
10     public Button but;
11     public float time;
12     float width, height;
13     int num;
14     void Start () 
15     {
16         num = sprite.Count;
17          width = this
 
.gameObject.GetComponent<RectTransform>().rect.width;
18          height = this.gameObject.GetComponent<RectTransform>().rect.height;
19          pic.transform.GetComponent<RectTransform>().sizeDelta=new Vector2(width,height);
20          for (int i = 0; i < num; i++)
21          {
 
22              
23              GameObject p = Instantiate(pic,new Vector3(transform.position.x+i*width,transform.position.y,0),transform.rotation)as GameObject;
24              p.transform.parent = this.gameObject.transform;
25              image.Add (p) ;
26              p.GetComponent<Image>().sprite = sprite[i];
27              Button b = Instantiate(but, new Vector3(transform.position.x- ( 25 * num - 15) / 2+25*i, transform.position.y - height/2 + 15, 0), transform.rotation) as Button;
28              b.transform.parent = GameObject.FindWithTag("Button").transform;
29              System.Object obj = (System.Object)i;
30              b.onClick.AddListener(delegate(){this.MoveToPic((int)obj);});
31          }
32         
33 
34     }
35     void OnGUI()
36     {
37         if (GUI.Button(new Rect(transform.position.x + 20 + width / 2, Screen.height - transform.position.y - 15, 30, 30), ">"))
38         {
39             if (image[0].transform.position.x < transform.position.x-3)
40             {
41                 Move(1);
42             }
43         }
44         if (GUI.Button(new Rect(transform.position.x -width/2-50,Screen.height- transform.position.y-15 , 30, 30), "<"))
45         {
46             if (image[num - 1].transform.position.x > transform.position.x+3)
47             {
48                 Move(-1);
49             }
50         }
51     }
52     public void Move(int dir)
53     {
54         for (int i = 0; i <num; i++)
55         {
56             iTween.MoveAdd(image[i], iTween.Hash("x", width * dir, "time", time));
57         }
58     }
59     public void MoveToPic(int i)
60     {
61         
62         float offset = transform.position.x - image[i].transform.position.x;
63         for (int j = 0; j < num; j++)
64         {
65             iTween.MoveAdd(image[j], iTween.Hash("x", offset, "time", time));
66         }
67     }
68 
69      
70 }

unity3d實現廣告滑動效果