Unity开发过程中如何正确的拿到Screen的width和height

首先明确两个概念:

Screen.currentResolution - 指的是设备分辨率，比如:电脑上指的就是电脑的屏幕分辨率，手机上指的就是手机的屏幕分辨率。

Screen.width,Screen.height - 指的是使用该值的窗口的宽高，比如:在Scene窗口使用指的就是Scene窗口的宽高，在Game窗口使用，即运行编辑器时使用，指的就是Game窗口的宽高，在自定义的Window使用指的就是自定义的Window的宽高。

定义如下窗口，用来测试上述结论:

代码:

 1 using UnityEngine;
 2 using UnityEditor;
 3 
 4 
 5 public class CustomWindow : EditorWindow
 6 {
 7     static CustomWindow mWin;
 8 
 9     [MenuItem("自定义窗口/MyWin")]
10     static void ShowWin()
11     {
12         mWin = GetWindow<CustomWindow>();
13         mWin.titleContent = new GUIContent("MyWin");
14         mWin.minSize = new Vector2(400, 200);
15     }
16 
17     void OnGUI()
18     {
19         if (GUILayout.Button("ShowInfo", GUILayout.Width(200), GUILayout.Height(50)))
20         {
21             Debug.Log("Screen.width = " + Screen.width + "  Screen.height = " + Screen.height + " | currentResolution = " + Screen.currentResolution);
22         }
23     }
24 }

打印结果:

在游戏开发过程中，我们更多关注的是Game视图下的屏幕宽高。假如，我们想在自定的Window中获取Game视图的屏幕宽高，该如何做呢？

下面是NGUI-3.9.4中提供的获取Game视图屏幕宽高的方法:

 1 static int mSizeFrame = -1;
 2 static System.Reflection.MethodInfo s_GetSizeOfMainGameView;
 3 static Vector2 mGameSize = Vector2.one;
 4 
 5 /// <summary>
 6 /// Size of the game view cannot be retrieved from Screen.width and Screen.height when the game view is hidden.
 7 /// </summary>
 8 
 9 static public Vector2 screenSize
10 {
11     get
12     {
13         int frame = Time.frameCount;
14 
15         if (mSizeFrame != frame || !Application.isPlaying)
16         {
17             mSizeFrame = frame;
18 
19             if (s_GetSizeOfMainGameView == null)
20             {
21                 System.Type type = System.Type.GetType("UnityEditor.GameView,UnityEditor");
22                 s_GetSizeOfMainGameView = type.GetMethod("GetSizeOfMainGameView",
23                     System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static);
24             }
25             mGameSize = (Vector2)s_GetSizeOfMainGameView.Invoke(null, null);
26         }
27         return mGameSize;
28     }
29 }

对于移动设备，个人理解Screen.width,Screen.height和Screen.currentResolution值是一样的(并未实际验证)。为了安全起见，个人建议，编辑器下和移动设备上最好用Screen.width,Screen.height统一起来。NGUI也是这个思路:

 1 #if UNITY_EDITOR
 2 static int mSizeFrame = -1;
 3 static System.Reflection.MethodInfo s_GetSizeOfMainGameView;
 4 static Vector2 mGameSize = Vector2.one;
 5 
 6 /// <summary>
 7 /// Size of the game view cannot be retrieved from Screen.width and Screen.height when the game view is hidden.
 8 /// </summary>
 9 
10 static public Vector2 screenSize
11 {
12     get
13     {
14         int frame = Time.frameCount;
15 
16         if (mSizeFrame != frame || !Application.isPlaying)
17         {
18             mSizeFrame = frame;
19 
20             if (s_GetSizeOfMainGameView == null)
21             {
22                 System.Type type = System.Type.GetType("UnityEditor.GameView,UnityEditor");
23                 s_GetSizeOfMainGameView = type.GetMethod("GetSizeOfMainGameView",
24                     System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Static);
25             }
26             mGameSize = (Vector2)s_GetSizeOfMainGameView.Invoke(null, null);
27         }
28         return mGameSize;
29     }
30 }
31 #else
32     /// <summary>
33     /// Size of the game view cannot be retrieved from Screen.width and Screen.height when the game view is hidden.
34     /// </summary>
35 
36     static public Vector2 screenSize { get { return new Vector2(Screen.width, Screen.height); } }
37 #endif

 

这里再提供一个折叠屏手机展开或者闭合后屏幕适配的一个思路:

Update中检测Screen的size是否发生变化，如果发生变化就去刷新一下锚定设置。

代码:

 1 using UnityEngine;
 2 
 3 public class CheckScreen : MonoBehaviour
 4 {
 5     int screenWidth, screenHeight;
 6     void Start()
 7     {
 8         screenWidth = Screen.width;
 9         screenHeight = Screen.height;
10     }
11 
12 
13     void Update()
14     {
15         if (screenWidth != Screen.width || screenHeight != Screen.height)
16         {
17             screenWidth = Screen.width;
18             screenHeight = Screen.height;
19             OnScreenChange();
20         }
21     }
22 
23     void OnScreenChange()
24     {
25         //发送消息-处理适配之 前 的一些操作
26         //UI适配
27         //3D适配
28         //其他...
29         //发送消息-处理适配之 后 的一些操作
30     }
31 }

 

posted @ 2022-01-25 13:26  小·糊涂仙  阅读(7928)  评论(0)  编辑  收藏  举报