startCoroutine("func",1.0f)可以用stopCoroutine("func")来停。
startCoroutine(func(1.0f))不能用stopCoroutine("func")来停。
参考：
http://forum.unity3d.com/threads/stopcoroutine-not-working.32609/
http://answers.unity3d.com/questions/891122/how-to-stop-coroutine-with-parameters.html
unity, StartCoroutine and StopCoroutine
原文：http://www.cnblogs.com/wantnon/p/5155266.html