戻り値の受け取り

CoroutineSample1.cs

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class CoroutineSample1 : MonoBehaviour
{
	IEnumerator Start ()
	{
		Debug.Log ("start");
		var ie1 = download ();
		var coroutine1 = StartCoroutine (ie1);
		var ie2 = download ();
		var coroutine2 = StartCoroutine (ie2);

		//処理を待ち合わせる
		yield return coroutine1;
		yield return coroutine2;
		
		// 戻り値を取得
		float downloadTime1 = (float)ie1.Current;
		float downloadTime2 = (float)ie2.Current;
		
		// 合計をログに出力
		float sum = downloadTime1 + downloadTime2;
		Debug.LogFormat ("finish! same : {0}", sum);
	}

	IEnumerator download ()
	{
		// ランダムな秒数(0.2~1sec)間待つ
		float waitSec = Random.Range (0.2f, 1f);
		yield return new WaitForSeconds (waitSec);

		// 戻り値を返す
		yield return waitSec;
	}
}