Unity Prefab API 整理（一）

最近写些工具，发现unity2017 和unity 2018 对于prefab的API是不一样的，再记录下

 

一、获取Prefab类型：　

   unity2017

 PrefabType type = PrefabUtility.GetPrefabType(orginObj);
  这里的PrefabType 的类型有3种：
     //
    // 摘要:
    //     The type of a prefab object as returned by PrefabUtility.GetPrefabType.
    public enum PrefabType
    {
        //
        // 摘要:
        //     The object is not a prefab nor an instance of a prefab.
        None = 0,
        //
        // 摘要:
        //     The object is a user created prefab asset.
        Prefab = 1,
        //
        // 摘要:
        //     The object is an imported 3D model asset.
        ModelPrefab = 2,
        //
        // 摘要:
        //     The object is an instance of a user created prefab.
        PrefabInstance = 3,
        //
        // 摘要:
        //     The object is an instance of an imported 3D model.
        ModelPrefabInstance = 4,
        //
        // 摘要:
        //     The object was an instance of a prefab, but the original prefab could not be
        //     found.
        MissingPrefabInstance = 5,
        //
        // 摘要:
        //     The object is an instance of a user created prefab, but the connection is broken.
        DisconnectedPrefabInstance = 6,
        //
        // 摘要:
        //     The object is an instance of an imported 3D model, but the connection is broken.
        DisconnectedModelPrefabInstance = 7
    }

若改资源为Prefab类型，则类型为Prefab.PrefabInstance

Unity2018

 

 PrefabAssetType type = PrefabUtility.GetPrefabAssetType(orginObj);

  //
    // 摘要:
    //     Enum indicating the type of Prefab Asset, such as Regular, Model and Variant.
    public enum PrefabAssetType
    {
        //
        // 摘要:
        //     The object being queried is not part of a Prefab at all.
        NotAPrefab = 0,
        //
        // 摘要:
        //     The object being queried is part of a regular Prefab.
        Regular = 1,
        //
        // 摘要:
        //     The object being queried is part of a Model Prefab.
        Model = 2,
        //
        // 摘要:
        //     The object being queried is part of a Prefab Variant.
        Variant = 3,
        //
        // 摘要:
        //     The object being queried is part of a Prefab instance, but because the asset
        //     it missing the actual type of Prefab can’t be determined.
        MissingAsset = 4
    }

 

默认PrefabType 为PrefabAssetType.Regular

二、获取场景中选中的Prefab路径

unity2017：

   这里需要注意的是：直接用AssetDatabase.GetAssetPath(object)  是获取不到prefab在Project 中的路径的，需要做层转换，

　　

//TODO: 为什么要这么做？是因为在Scene你有可能选择的是Prefab下面的某个节点，需要先做层转换
var scenePrefab = PrefabUtility.GetPrefabParent(orginObj) as GameObject;
 //获取Prefab路径
 string path = AssetDatabase.GetAssetPath(scenePrefab);

//当前选中Prefab里面的节点时，想要返回Prefab 根节点

GameObject scenePrefabRoot = PrefabUtility.FindPrefabRoot(orginObj);

 

unity2018：

 这里有直接的API可以直接获取，所以相对简单些

 string prefabPath = PrefabUtility.GetPrefabAssetPathOfNearestInstanceRoot(orginObj);

这里需要注意的是，无论选择的是scene 中prefab的哪个节点，这里都可以返回该Prefab 在Project 中的路径

 

结论：由此可以看出来，在unity2018 中Prefab的操作起来更方便些，另外untiy2018 还提供下，Scene下预览prefab功能，其实这块也是可以用代码控制的，这部分内容将在Unity Prefab API 整理（二） 说明。。。。