Texture Fadein Fadeout using Coroutine - Unity3d

Code for making fadein, fadeout in Unity3d C#,

Fadein,

IEnumerator FadeIn(GameObject gameObj)
 {
  for (float f = 0f; f <= 1; f += 0.01f)
  {
   Color c = gameObj.renderer.material.color;
   c.a = f;
   gameObj.renderer.material.color = c;
   yield return new WaitForSeconds(.01f);
  }

  yield return null;
 }

Fadeout, 

IEnumerator FadeOut(GameObject gameObj)
 {
  for (float f = 1f; f >= 0; f -= 0.01f)
  {
   Color c = gameObj.renderer.material.color;
   c.a = f;
   gameObj.renderer.material.color = c;
   yield return new WaitForSeconds(.01f);
  }

  yield return null;
 }

Pre Requisites: Object you are passing  as argument must have shader which has color property in it.

FadeInFadeOut using NGUI UISprite and Coroutine,

 public UIAtlas RunTimeAtlas;

IEnumerator ColorFadeInFadeOut() 

{

UISprite newSprite = NGUITools.AddWidget<UISprite>(GameObject.Find("Story"));

newSprite.depth = 6;

newSprite.gameObject.name = "FadeInFadeOut";

newSprite.atlas = RunTimeAtlas;

newSprite.spriteName = "White120";

newSprite.SetDimensions (Screen.width * 3, Screen.height * 3);

TweenAlpha ta1 = newSprite.gameObject.AddComponent<TweenAlpha> ();

ta1.from = 0.0f;

ta1.to = 1.0f;

yield return new WaitForSeconds(1.10f);

TweenAlpha ta2 = newSprite.gameObject.AddComponent<TweenAlpha> ();

ta2.from = 1.0f;

ta2.to = 0.0f;

yield return new WaitForSeconds(1.0f);

NGUITools.Destroy(newSprite.gameObject);

}

Pre Requisites: Atlas reference must be assigned to RunTimeAtlas in Unity Inspector having white texture in it. Texture of other color can also be used for fade in and fade out effect.