Unity中，保存在OnInspectorGUI中改變的值

using UnityEngine;
using System.Collections;
using UnityEditor;

[CustomEditor( typeof( MessageLog ) )]
public class MessageLogEditor : Editor {
    public override void OnInspectorGUI() {
        MessageLog msgLog = (MessageLog)target;

        msgLog.IsLogC2SMessage = EditorGUILayout.Toggle( "Print C2S message", msgLog.IsLogC2SMessage );
        msgLog.IsLogS2CMessage = EditorGUILayout.Toggle( "Print S2C message", msgLog.IsLogS2CMessage );

　　　　 // 保存上面Toggle設置值
        if ( GUI.changed ) {
            EditorUtility.SetDirty( target );
        }
    }
}