实现Unity对Dictionary的序列化

unity doc: http://docs.unity3d.com/ScriptReference/ISerializationCallbackReceiver.OnBeforeSerialize.html

 1 using UnityEngine;
 2 using System.Collections.Generic;
 3
 4 /// Usage:
 5 ///
 6 /// [System.Serializable]
 7 /// class MyDictionary : SerializableDictionary<int, GameObject> {}
 8 /// public MyDictionary dic;
 9 ///
10 [System.Serializable]
11 public class SerializableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, ISerializationCallbackReceiver
12 {
13     // We save the keys and values in two lists because Unity does understand those.
14     [SerializeField]
15     private List<TKey> _keys;
16     [SerializeField]
17     private List<TValue> _values;
18
19     // Before the serialization we fill these lists
20     public void OnBeforeSerialize()
21     {
22         _keys = new List<TKey>(this.Count);
23         _values = new List<TValue>(this.Count);
24         foreach (var kvp in this)
25         {
26             _keys.Add(kvp.Key);
27             _values.Add(kvp.Value);
28         }
29     }
30
31     // After the serialization we create the dictionary from the two lists
32     public void OnAfterDeserialize()
33     {
34         this.Clear();
35         int count = Mathf.Min(_keys.Count, _values.Count);
36         for (int i = 0; i < count; ++i)
37         {
38             this.Add(_keys[i], _values[i]);
39         }
40     }
41 }