Unity3D存储PlayerPrefs 用法

using UnityEngine;
using System.Xml.Serialization;
using System.IO;
public class StateStorage{
public static T LoadData( 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( 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 );
}
}