【Unity】タグが付いたオブジェクト数を数える

TagScript.cs

using UnityEngine;
using System.Collections;

public class TagScript : MonoBehaviour {

	GameObject[] tagObjects;

	float timer = 0.0f;
	float interval = 2.0f;

	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
		timer += Time.deltaTime;
		if(timer > interval){
			Check("HogeTag");
			timer = 0;
		}
	}

	//シーン上のBlockタグが付いたオブジェクトを数える
	void Check(string tagname){
		tagObjects = GameObject.FindGameObjectsWithTag(tagname);
		Debug.Log(tagObjects.Length); //tagObjects.Lengthはオブジェクトの数
		if(tagObjects.Length == 0){
			Debug.Log(tagname + "タグがついたオブジェクトはありません");
		}
	}
}