serializeProperty経由で書き込む時の注意

CustomInspector.cs

using UnityEngine;
using UnityEditor;
[CustomEditor( typeof( XXX ) )]
[CanEditMultipleObjects]
public class XXXInspector : Editor {
	SerializedProperty xxx;// public float xxx{private get{return this.__xxx;}set{this.__xxx = value;}} [SerializeField] float __xxx;
	SerializedProperty yyy;// [SerializeField]private float yyy;
	SerializedProperty zzz;// [SerializeField]private Transform zzz; // reference type.

	public void OnEnable(){
		this.xxx = serializedObject.FindProperty( "xxx" ) ;
		this.yyy = serializedObject.FindProperty( "yyy" ) ;
		this.zzz = serializedObject.FindProperty( "zzz" ) ;
	}


	public override void OnInspectorGUI(){
		serializedObject.Update();
		var script = target as XXX;

		# region property of xxx

		if( this.xxx == null ){
			Debug.LogError( "xxx is null");
		}else{
			// スクリプトのsetter経由で値を渡す。普通に動く。
			script.xxx = EditorGUILayout.Slider( "xxx", this.xxx.floatValue, 0.0001f, 1f ) ;
		}
		# endregion

		# region property of yyy

		if( speed == null ){
			Debug.LogError("yyy is null");
		}else{
			// こやつが曲者。動かないスライダになる。
			this.yyy.floatValue = EditorGUILayout.Slider( "yyy", this.yyy.floatValue, 0.001f, 1f ) ;
		}
		# endregion

		# region property of zzz
		if( this.zzz == null ){
			Debug.LogError("zzz is null");
		}else{
			this.zzz.objectReferenceValue = EditorGUILayout.ObjectField( "zzz", this.zzz.objectReferenceValue, typeof( Transform ), true );
		}
		# endregion

		if( GUILayout.Button( "Hoge!" ) && Application.isPlaying ){
			script.Hoge();
		}

		// これがないとyyyは動かない。xxxとzzzは動く。
		serializedObject.ApplyModifiedProperties();

	}

}