unity3d 状态存储 PlayerPrefs高级用法

using UnityEngine;using System.Xml.Serialization;using System.IO;public class StateStorage{  public static T LoadData<T>( string key ){  if ( PlayerPrefs.HasKey( key ) ) {     XmlSerializer serializer = new XmlSerializer( typeof( T ) );   StringReader sr = new StringReader( PlayerPrefs.GetString( key ) );   return ( T )serializer.Deserialize( sr );  }else{   return default(T);  } }   public static void SaveData<T>( string key, T source ){  XmlSerializer serializer = new XmlSerializer( typeof( T ) );  StringWriter sw = new StringWriter();  serializer.Serialize( sw, source );  PlayerPrefs.SetString( key, sw.ToString() ); }  public static void ClearData( string key ){  PlayerPrefs.DeleteKey( key ); } }