Material.HasProperty 是否有属性

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public void Awake() {
		if (renderer.material.HasProperty("_Color"))
			renderer.material.SetColor("_Color", Color.red);

	}
}

// Attach this to a gameObject that has a renderer.
//把它附加在有renderer组件的游戏物体（gameobject）上

if(renderer.material.HasProperty("_Color"))
	renderer.material.SetColor("_Color", Color.red );