导入的FBX动画无法添加keyframe、curves、events显示read-only解决方案

在导入FBX动画后，如果想添加动画事件，则打开Animation，添加事件即可，但是直接编辑导入的Animation clips是不行的，显示read-only，这里有两种解决方法。
1、选中要操作的Animation clip，Ctrl+D复制一份出来，直接使用复制出来的这份即可。
2、可以使用插件来方便操作，以下代码修改自Unity论坛，加工完善了一下下，使用方法：选中要操作的Animation clip，单击Assets/Transfer Clips Curves to Copy选项即可。

using UnityEditor;using UnityEngine;using System.IO;using System.Collections;public class CurvesTransferer{    const string duplicatePostfix = "_copy";    const string animationFolder = "Animations";    static void CopyClip(string importedPath, string copyPath)    {        AnimationClip src = AssetDatabase.LoadAssetAtPath(importedPath, typeof(AnimationClip)) as AnimationClip;        AnimationClip newClip = new AnimationClip();        newClip.name = src.name + duplicatePostfix;        AssetDatabase.CreateAsset(newClip, copyPath);        AssetDatabase.Refresh();    }    [MenuItem("Assets/Transfer Clips Curves to Copy")]    static void CopyCurvesToDuplicate()    {        // Get selected AnimationClip        Object[] imported = Selection.GetFiltered(typeof(AnimationClip), SelectionMode.Unfiltered);        if (imported.Length == 0)        {            Debug.LogWarning("Either no objects were selected or the objects selected were not AnimationClips.");            return;        }        //If necessary, create the animations folder.        if (Directory.Exists("Assets/" + animationFolder) == false)        {            AssetDatabase.CreateFolder("Assets", animationFolder);        }        foreach (AnimationClip clip in imported)        {            string importedPath = AssetDatabase.GetAssetPath(clip);            Debug.Log("OriginalPath: " + importedPath);            //If the animation came from an FBX, then use the FBX name as a subfolder to contain the animations.            string copyPath;            if (importedPath.Contains(".fbx") || importedPath.Contains(".FBX"))            {                //With subfolder.                string folder = importedPath.Substring(importedPath.LastIndexOf("/") + 1, importedPath.LastIndexOf(".") - importedPath.LastIndexOf("/") - 1);                if (!Directory.Exists("Assets/Animations/" + folder))                {                    AssetDatabase.CreateFolder("Assets/Animations", folder);                }                copyPath = "Assets/Animations/" + folder + "/" + clip.name + duplicatePostfix + ".anim";            }            else            {                //No Subfolder                copyPath = "Assets/Animations/" + clip.name + duplicatePostfix + ".anim";            }            Debug.Log("CopyPath: " + copyPath);            CopyClip(importedPath, copyPath);            AnimationClip copy = AssetDatabase.LoadAssetAtPath(copyPath, typeof(AnimationClip)) as AnimationClip;            if (copy == null)            {                Debug.Log("No copy found at " + copyPath);                return;            }            // Copy curves from imported to copy            AnimationClipCurveData[] curveDatas = AnimationUtility.GetAllCurves(clip, true);            for (int i = 0; i < curveDatas.Length; i++)            {                AnimationUtility.SetEditorCurve(                    clip,                     EditorCurveBinding.FloatCurve(curveDatas[i].path, curveDatas[i].type, curveDatas[i].propertyName),                     curveDatas[i].curve                    );             //   AnimationUtility.SetEditorCurve(            //	copy,            //	curveDatas[i].path,            //	curveDatas[i].type,            //	curveDatas[i].propertyName,            //	curveDatas[i].curve           // );            }            Debug.Log("Copying curves into " + copy.name + " is done");        }    }}

补充：
第二种用脚本复制的方法，在某些情况下使用复制出来的Animation clip 时会报警告，不能使用，原因不明，不过根据警告信息也能猜个12345；还有一点，脚本复制出来的Animation clip 在Inspector中只有一个可调节的地方，但是手动复制的Animation clip 中基本原有的可调节项都在，可能脚本复制丢失一些信息，最好还是手动Ctrl+D吧，警告信息如下：

Animation clip 'chongfeng_copy' is not retargetable. Animation clips used within the Animator Controller need to have Muscle Definition set up in the Asset Importer InspectorUnityEditor.DockArea:OnGUI()