Unity3D脚本自动添加tag和Layer

using UnityEditor;

public class LoadTagAndLayer : AssetPostprocessor
{
private static string[] Tags = { "aaaa", "bbbb", "cccc", "dddd" };//所有需要添加的tag值

private static string[] Layers = { "AAAA", "BBBB", "CCCC", "DDDD" };//所有需要添加的layer值

/// <summary>
/// 当所有资源加载完毕后执行
/// </summary>
/// <param name="importedAssets"></param>
/// <param name="deletedAssets"></param>
/// <param name="movedAssets"></param>
/// <param name="movedFromAssetPaths"></param>
static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets, string[] movedAssets, string[] movedFromAssetPaths)
{
foreach (string s in importedAssets)
{
if (s.Equals("Assets/NewBehaviourScript.cs"))
{
foreach (string item in Tags)
{
AddTag(item);//循环加载tag
}

foreach (string item in Layers)
{
AddLayer(item);//循环加载layer
}
return;
}
}
}

/// <summary>
/// 加载层
/// </summary>
/// <param name="layer"></param>
private static void AddLayer(string layer)
{
if (!IsHasLayer(layer))
{
//加载项目设置层以及tag值管理 资源
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
SerializedProperty it = tagManager.GetIterator();//获取层或tag值所有列表信息
while (it.NextVisible(true))//判断向后是否还有信息，如果没有则返回false
{
#if UNITY_5
if (it.name=="layers")
{
//层默认是32个，只能从第8个开始写入自己的层
for (int i = 8; i < it.arraySize; i++)
{
SerializedProperty dataPoint = it.GetArrayElementAtIndex(i);//获取层信息
if (string.IsNullOrEmpty(dataPoint.stringValue))//如果制定层内为空，则可以填写自己的层名称
{
dataPoint.stringValue = layer;//设置名字
tagManager.ApplyModifiedProperties();//保存修改的属性
return;
}
}
}

#else
if (it.name.StartsWith("User Layer"))
{
if (it.type == "string")
{
if (string.IsNullOrEmpty(it.stringValue))
{
it.stringValue = layer;
tagManager.ApplyModifiedProperties();
return;
}
}
}
#endif
}
}
}

/// <summary>
/// 判断是否已经有层
/// </summary>
/// <param name="layer"></param>
/// <returns></returns>
private static bool IsHasLayer(string layer)
{
for (int i = 0; i < UnityEditorInternal.InternalEditorUtility.layers.Length; i++)
{
if (UnityEditorInternal.InternalEditorUtility.layers[i].Contains(layer))
{
return true;
}
}
return false;
}

/// <summary>
/// 添加Tag值
/// </summary>
/// <param name="tag"></param>
private static void AddTag(string tag)
{
if (!IsHasTag(tag))
{
SerializedObject tagManager = new SerializedObject(AssetDatabase.LoadAllAssetsAtPath("ProjectSettings/TagManager.asset")[0]);
SerializedProperty it = tagManager.GetIterator();
while (it.NextVisible(true))
{
if (it.name == "tags")
{
#if UNITY_5
it.arraySize++;
SerializedProperty dataPoint = it.GetArrayElementAtIndex(it.arraySize - 1);
dataPoint.stringValue = tag;
tagManager.ApplyModifiedProperties();
return;
#else
for (int i = 0; i < it.arraySize; i++)
{
SerializedProperty dataPoint = it.GetArrayElementAtIndex(i);
if (string.IsNullOrEmpty(dataPoint.stringValue))
{
dataPoint.stringValue = tag; tagManager.ApplyModifiedProperties();
return;
}
}
#endif
}
}
}
}

/// <summary>
/// 判断是否有tag值
/// </summary>
/// <param name="tag"></param>
/// <returns></returns>
private static bool IsHasTag(string tag)
{
for (int i = 0; i < UnityEditorInternal.InternalEditorUtility.tags.Length; i++)
{
if (UnityEditorInternal.InternalEditorUtility.tags[i].Contains(tag))
{
return true;
}
}
return false;
}
}

适用Unity4-5版本

OnPostprocessAllAssets方法被调用是在资源全部加载完毕之后，所以让动态加载Tag值和Layer需要 同时把此脚本也打包到package中，因此在根目录下 新建一个名称为NewBehaviourScript的C#脚本  则方法就可以执行了。

文章链接：http://www.bihod.com/post-51.html