unity中全屏背景图缩放

 1 using UnityEngine;
 2 using System.Collections;
 3
 4 public class BgPicScript : MonoBehaviour {
 5
 6     // Use this for initialization
 7     public UITexture bg;
 8     void Start () {
 9
10         Debug.Log("device宽高: " + Screen.width + "_" + Screen.height);
11
12         UIRoot root = GameObject.FindObjectOfType<UIRoot>();
13
14         if (root != null)
15         {
16             //终极大杀器 整体资源缩放比例
17             float s = (float)root.activeHeight / Screen.height;
18             int height =  Mathf.CeilToInt(Screen.height * s);
19             int width = Mathf.CeilToInt(Screen.width * s);
20
21             Debug.Log("按设计分辨率屏幕width = " + width + "_height = " + height);
22
23             Debug.Log("背景图片的设计分辨率bgWIdth:" + bg.width + "_bgHeight:" + bg.height);
24
25             float bgRatio = (float) bg.width / bg.height;
26             float manualRatio = (float)width / height;
27
28
29             if (bgRatio < manualRatio) //遇到按照屏幕高度缩放水平两边出现黑边的情况,要按照宽度来缩放背景图片
30             {
31                 //bg.width = width;
32                 //bg.height = Mathf.CeilToInt(width / );
33
34                 float targetScale = (float)width / bg.width;
35                 bg.transform.localScale = new Vector3(targetScale,targetScale, 1);
36             }
37         }
38
39
40     }
41
42     // Update is called once per frame
43     void Update () {
44
45     }
46 }
47
48
49
50 using UnityEngine;
51 using System.Collections;
52
53 public class UIRootScript : MonoBehaviour {
54
55     // Use this for initialization
56     void Start () {
57         AdaptiveUI();
58     }
59
60     // Update is called once per frame
61     void Update () {
62
63     }
64
65     static private void AdaptiveUI()
66     {
67         int ManualWidth = 1024;
68         int ManualHeight = 768;
69         UIRoot uiRoot = GameObject.FindObjectOfType<UIRoot>();
70         if (uiRoot != null)
71         {
72             if (System.Convert.ToSingle(Screen.height) / Screen.width > System.Convert.ToSingle(ManualHeight) / ManualWidth)
73                 uiRoot.manualHeight = Mathf.RoundToInt(System.Convert.ToSingle(ManualWidth) / Screen.width * Screen.height);
74             else
75                 uiRoot.manualHeight = ManualHeight;
76         }
77         Debug.Log("uiRoot Height:" + uiRoot.manualHeight);
78     }
79 }