先上效果

 

Shader

Shader "Unlit/Transparent Colored Flow Texture"{	Properties	{		_MainTex ("Base (RGB), Alpha (A)", 2D) = "black" {}		_FlashTex("Flash (RGB), Alpha (A)", 2D) = "white" {}		_FlashColor("Flash Color", Color) = (1,1,1,0)		_Interval("Interval", Float) = 5        	}		SubShader	{		LOD 200		Tags		{			"Queue" = "Transparent"			"IgnoreProjector" = "True"			"RenderType" = "Transparent"		}				Pass		{			Cull Off			Lighting Off			ZWrite Off			Fog { Mode Off }			Offset -1, -1			Blend SrcAlpha OneMinusSrcAlpha			CGPROGRAM			#pragma vertex vert			#pragma fragment frag						#include "UnityCG.cginc"			sampler2D _MainTex;			float4 _MainTex_ST;			sampler2D _FlashTex;			float4 _FlashColor;			float _Interval;						struct appdata_t			{				float4 vertex : POSITION;				float2 texcoord : TEXCOORD0;				fixed4 color : COLOR;			};				struct v2f			{				float4 vertex : SV_POSITION;				half2 texcoord : TEXCOORD0;				half2 texcoord1 : TEXCOORD1;				fixed4 color : COLOR;			};				v2f o;			float mymod(float x, float y)			{			  return x - y * floor(x/y);			}			v2f vert (appdata_t v)			{				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);				o.texcoord = v.texcoord;				o.texcoord1 = o.texcoord;				o.texcoord1.x += mymod(-_Time.w, _Interval) - 1.0f;				o.color = v.color;				return o;			}							fixed4 frag (v2f IN) : COLOR			{				float4 col = tex2D(_MainTex, IN.texcoord) * IN.color;				                            	float4 flashCol = tex2D(_FlashTex,IN.texcoord1)*_FlashColor;				col.rgb = col.rgb + flashCol.rgb * flashCol.w;				                return col;			}			ENDCG		}	}	SubShader	{		LOD 100		Tags		{			"Queue" = "Transparent"			"IgnoreProjector" = "True"			"RenderType" = "Transparent"		}				Pass		{			Cull Off			Lighting Off			ZWrite Off			Fog { Mode Off }			Offset -1, -1			ColorMask RGB			Blend SrcAlpha OneMinusSrcAlpha			ColorMaterial AmbientAndDiffuse						SetTexture [_MainTex]			{				Combine Texture * Primary			}		}	}}

　　

　　

　　

脚本

using UnityEngine;using System.Collections;/*-------------------------------------------------------------------Copyright 2015 Minty Game LTD. All Rights Reserved.Maintained by  bailu -------------------------------------------------------------------bailu				2016-01-26 14:45:52			带流光的UITexture*/[ExecuteInEditMode][RequireComponent(typeof(UITexture))]public class UIFlowTexture : MonoBehaviour {	//流光颜色	[SerializeField]	private Texture FlowTexture = null;	//流光时间间隔	[SerializeField]	private float Interval = 5f;	//流光颜色	[SerializeField]	private Color FlowColor = Color.white;	//被流光的UITexture	private UITexture mUITexture;	void Awake()	{		mUITexture = gameObject.GetComponent
     
      ();	}	// Use this for initialization	void Start () 	{		ResourceManager.PrepareResource
      
       (Resource.Dir.Material + "UITexture_Flow.mat", material =>		{			mUITexture.material = new Material(material);			RefreshMaterialProperty();		});	}	[ContextMenu("Refresh Material Property")]	public void RefreshMaterialProperty()	{		var mat = mUITexture.material;		if(null==mat)		{			return;		}		if(null!=FlowTexture)		{			mat.SetTexture("_FlashTex", FlowTexture);		}		mat.SetFloat("_Interval", Interval);		mUITexture.MarkAsChanged();	}}
      
     

　　

 

搞法：

1、创建个材质命名成UITexture_Flow.mat，把上面的shader拖拽进去。

2、创建GameObject，挂上UITexture(不用修改的材质，原因是我代码里会去修改他的材质。为什么总是new 新的材质，原因是每个UITexture都要自己流动自己的)

3、然后再挂上UITextureFlow，设置流光的参数

注意：如果你放ScrollView下发现裁剪不正确，那就按照NGUI的shader规则，增加XXX 1.shader，XXX 2.shader。