unity editor模式下获取当前gameview视图的分辨率

使用这个脚本的最后其实都要下面这个方法

  public static Vector2 GetScreenResolution()
    {
        Vector2 gameViewSize;
        //使用宏编译主要是为了打包的时候不会报错
#if UNITY_EDITOR
        gameViewSize = GameViewSize();
#else
        gameViewSize = new Vector2(Screen.currentResolution.width,
            Screen.currentResolution.height) ;
#endif

        return gameViewSize;
    }

根据反射

using UnityEngine;


public class GetGameViewSize : MonoBehaviour
{
    private void OnEnable()
    {
        GameViewSize();
    }

#if UNITY_EDITOR
    private Vector2 GameViewSize()
    {
        var mouseOverWindow = UnityEditor.EditorWindow.mouseOverWindow;
        System.Reflection.Assembly assembly = typeof(UnityEditor.EditorWindow).Assembly;
        System.Type type = assembly.GetType("UnityEditor.PlayModeView");

        Vector2 size = (Vector2) type.GetMethod(
            "GetMainPlayModeViewTargetSize",
            System.Reflection.BindingFlags.NonPublic |
            System.Reflection.BindingFlags.Static
        ).Invoke(mouseOverWindow, null);

        return size;
    }

#endif
}

这个代码经过测试能在编辑器运行，试过几次都能正确输出Game视图的尺寸。

屏幕尺寸是1920*1080，则最大化Game视图的时候尺寸和这个基本一致。

根据UI

最后在有canvas的情况下，想了个方法获得屏幕的分辨率

#if UNITY_EDITOR
int canvasDisplay = RootCanvasTransform.GetComponent().targetDisplay;
            float editorWidth = Display.displays[canvasDisplay].renderingWidth;
            float editorHeight = Display.displays[canvasDisplay].renderingHeight;
#else        

RootCanvasTransform指定那个display才能获得对应的GameView窗口 这个做法在做多屏应用的时候 应该也能获得所需canvas对应的display的分辨率 所以一个全屏扩展图片的做法是

#if UNITY_EDITOR

        int canvasDisplay = RootCanvasTransform.GetComponent().targetDisplay;
        float screenWidth = Display.displays[canvasDisplay].renderingWidth;
        float screenHeight = Display.displays[canvasDisplay].renderingHeight;
#else
        float screenWidth = Screen.currentResolution.width;
        float screenHeight = Screen.currentResolution.height;
#endif
        
        
        ...
        hangerRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, screenWidth);
        hangerRectTransform.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, screenHeight);
        ...