最近造了個輪子可以批量替換prefab里的prefab竹挡，歡迎大家測試～https://bitbucket.org/xuanyusong/prefab-replace
最近在做UI部分中遇到了這樣的問題再芋，就是Prefab里面預(yù)制了Prefab独令∠孺遥可是在Unity里面一旦Prefab預(yù)制了Prefab那么內(nèi)部的Prefab就失去關(guān)聯(lián)汰蜘。導(dǎo)致與如果要改內(nèi)部的Prefab需要把所有引用的地方全部改一遍晴弃。今天在逛國外網(wǎng)站看到了一個老外的思路宛瞄，原文在這里http://framebunker.com/blog/poor-mans-nested-prefabs/
下面直接上代碼
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
using UnityEditor.Callbacks;
#endif
using System.Collections.Generic;
[ExecuteInEditMode]
public class PrefabInstance : MonoBehaviour
{
public GameObject prefab;
#if UNITY_EDITOR
// Struct of all components. Used for edit-time visualization and gizmo drawing
public struct Thingy {
public Mesh mesh;
public Matrix4x4 matrix;
public List<Material> materials;
}
[System.NonSerializedAttribute] public List<Thingy> things = new List<Thingy> ();
void OnValidate () {
things.Clear();
if (enabled)
Rebuild (prefab, Matrix4x4.identity);
}
void OnEnable () {
things.Clear();
if (enabled)
Rebuild (prefab, Matrix4x4.identity);
}
void Rebuild (GameObject source, Matrix4x4 inMatrix) {
if (!source)
return;
Matrix4x4 baseMat = inMatrix * Matrix4x4.TRS (-source.transform.position, Quaternion.identity, Vector3.one);
foreach (MeshRenderer mr in source.GetComponentsInChildren(typeof (Renderer), true))
{
things.Add(new Thingy () {
mesh = mr.GetComponent<MeshFilter>().sharedMesh,
matrix = baseMat * mr.transform.localToWorldMatrix,
materials = new List<Material> (mr.sharedMaterials)
});
}
foreach (PrefabInstance pi in source.GetComponentsInChildren(typeof (PrefabInstance), true))
{
if (pi.enabled && pi.gameObject.activeSelf)
Rebuild (pi.prefab, baseMat * pi.transform.localToWorldMatrix);
}
}
// Editor-time-only update: Draw the meshes so we can see the objects in the scene view
void Update () {
if (EditorApplication.isPlaying)
return;
Matrix4x4 mat = transform.localToWorldMatrix;
foreach (Thingy t in things)
for (int i = 0; i < t.materials.Count; i++)
Graphics.DrawMesh (t.mesh, mat * t.matrix, t.materials[i], gameObject.layer, null, i);
}
// Picking logic: Since we don't have gizmos.drawmesh, draw a bounding cube around each thingy
void OnDrawGizmos () { DrawGizmos (new Color (0,0,0,0)); }
void OnDrawGizmosSelected () { DrawGizmos (new Color (0,0,1,.2f)); }
void DrawGizmos (Color col) {
if (EditorApplication.isPlaying)
return;
Gizmos.color = col;
Matrix4x4 mat = transform.localToWorldMatrix;
foreach (Thingy t in things)
{
Gizmos.matrix = mat * t.matrix;
Gizmos.DrawCube(t.mesh.bounds.center, t.mesh.bounds.size);
}
}
// Baking stuff: Copy in all the referenced objects into the scene on play or build
[PostProcessScene(-2)]
public static void OnPostprocessScene() {
foreach (PrefabInstance pi in UnityEngine.Object.FindObjectsOfType (typeof (PrefabInstance)))
???? BakeInstance (pi);
}
public static void BakeInstance (PrefabInstance pi) {
if(!pi.prefab || !pi.enabled)
return;
pi.enabled = false;
GameObject go = PrefabUtility.InstantiatePrefab(pi.prefab) as GameObject;
Quaternion rot = go.transform.localRotation;
Vector3 scale = go.transform.localScale;
go.transform.parent = pi.transform;
go.transform.localPosition = Vector3.zero;
go.transform.localScale = scale;
go.transform.localRotation = rot;
pi.prefab = null;
foreach (PrefabInstance childPi in go.GetComponentsInChildren<PrefabInstance>())
BakeInstance (childPi);
}
#endif
}
用法比較簡單，比如我有兩個Prefab爱咬，inside嵌入在Big里面尺借。如下圖所示，把PrefabInstance腳本掛在Big上精拟，然后把inside拖入下方燎斩。
OK 無論怎么修改inside這個Prefab，當(dāng)實例化Big的時候都能得到最新修改的Inside這個Prefab蜂绎。
持續(xù)思考：
界面預(yù)覽問題栅表，就是我在布界面的時候，我需要把子集Prefab界面控件拖進(jìn)來預(yù)覽效果师枣。如果用上述思路UI的Prefab就必須通過腳本自動生成怪瓶。一份是預(yù)覽用的也就是不需要腳本的，一份是只帶腳本運(yùn)行時動態(tài)生成的践美。在處理自動生成UIPrefab的時候可以利用tag 比如像這種需要內(nèi)嵌的Prefab標(biāo)記一個特殊的tag洗贰，在Editor下完成Prefab的導(dǎo)出。另外布界面的時候不需要綁定腳本陨倡，而上述腳本的綁定也應(yīng)該由Editor導(dǎo)出Prefab的時候完成敛滋。
總之一切布界面的時候只操作Prefab不操作腳本。
最近造了個輪子可以批量替換prefab里的prefab兴革，歡迎大家測試～https://bitbucket.org/xuanyusong/prefab-replace
如果有更好的方法歡迎各位朋友在下面給我留言绎晃，謝謝。
本文固定鏈接:?https://www.xuanyusong.com/archives/3042
轉(zhuǎn)載請注明:?雨松MOMO?2014年07月31日?于?雨松MOMO程序研究院?發(fā)表
