Unity-制作一个截图工具

工作中经常会遇到需要截图给项目经理或者设计人员的需求。平时用惯了微信就会顺手用Alt+A进行截图了，但是在Unity编辑器中Game窗口最大化也不会铺满全屏，我们也无法截取到满意的尺寸。Unity Package Manager中提供了一个插件“Recoder”，这个插件功能强大可以截图、录制GIF和录制视频，我不想每次都安装这个插件于是就自己做一个简易的截图工具，把这个工具附加在框架中，这样可以很方便的进行调用了。

在scripts文件夹中新建一个“Editor”文件夹，然后在‘Editor’文件中新建一个‘ScreenCaptureEditor’脚本。粘贴下面的代码，等编译完成后从工具栏可以打开截图工具了。

using System.IO;
using UnityEditor;
using UnityEngine;

public class ScreenCaptureEditor : EditorWindow
{
    private static string directory = "Screenshots/Capture/";
    private static string latestScreenshotPath = "";
    private bool initDone = false;

    private GUIStyle BigText;

    void InitStyles()
    {
        initDone = true;
        BigText = new GUIStyle(GUI.skin.label)
        {
            fontSize = 20,
            fontStyle = FontStyle.Bold,
            alignment = TextAnchor.MiddleCenter,
            normal = new GUIStyleState() { textColor=Color.green}
        };
    }

    private void OnGUI()
    {
        if (!initDone)
        {
            InitStyles();
        }

        GUILayout.Label("游戏窗口截图", BigText);
        if (GUILayout.Button("截图"))
        {
            TakeScreenshot(1);
        }
        GUILayout.Label("分辨率: " + GetResolution(1));

        if (GUILayout.Button("双倍分辨率截图"))
        {
            TakeScreenshot(2);
        }
        GUILayout.Label("分辨率: " + GetResolution(2));

        if (GUILayout.Button("打开目录"))
        {
            ShowFolder();
        }
        GUILayout.Label("保存目录: " + directory);
    }

    [MenuItem("Tools/截图")]
    public static void ShowWindow()
    {
        var window = GetWindowWithRect<ScreenCaptureEditor>(new Rect(0, 0, 180, 250));
        window.titleContent = new GUIContent("截图工具");
        window.Focus();
        window.Repaint();
    }

    private static void ShowFolder()
    {
        if (File.Exists(latestScreenshotPath))
        {
            EditorUtility.RevealInFinder(latestScreenshotPath);
            return;
        }
        Directory.CreateDirectory(directory);
        EditorUtility.RevealInFinder(directory);
    }

    private static void TakeScreenshot(int super)
    {
        Directory.CreateDirectory(directory);
        var currentTime = System.DateTime.Now;
        var filename = currentTime.ToString().Replace('/', '-').Replace(':', '_') + ".png";
        var path = directory + filename;
        ScreenCapture.CaptureScreenshot(path,super);
        latestScreenshotPath = path;
        Debug.Log($"Screenshot saved: <b>{path}</b> with resolution <b>{GetResolution(super)}</b>");
    }

    private static string GetResolution(int super)
    {
        Vector2 size = UnityEditor.Handles.GetMainGameViewSize();
        Vector2Int sizeInt = new Vector2Int((int)size.x, (int)size.y);
        return $"{sizeInt.x*super}x{sizeInt.y*super}";
    }

}