把該指令碼掛載到需要顏色漸變的ugui的text物體上。

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
[AddComponentMenu("UI/Effect/Gradient")]
public class Gradient : BaseMeshEffect
{
    [SerializeField]
    private Color32 leftColor = Color.black;
    [SerializeField]
    private Color32 rightColor = Color.black;
	

    public override void ModifyMesh(VertexHelper vh)
    {
        if (!IsActive())
        {
            return;
        }

        var vertextList = new List<UIVertex>();
        vh.GetUIVertexStream(vertextList);
        int count = vertextList.Count;

        ApplyGradient(vertextList,0,count);
        vh.Clear();
        vh.AddUIVertexTriangleStream(vertextList);
        
    }

    private void ApplyGradient(List<UIVertex> vertexList, int start, int end)
    {
        float leftX = 0;
        float RightX = 0;
        print(end);

        for (int i = 0; i < end; i++)
        {
            float x = vertexList[i].position.x;

            if (x > RightX)
            {
                RightX = x;
            }
            else if (x < leftX)
            {
                leftX = x;
            }
        }

        float uiElementWeight = RightX - leftX;

        for (int i = 0; i < end; i++)
        {
            UIVertex uiVertex = vertexList[i];
            uiVertex.color = Color32.Lerp(leftColor,rightColor,(uiVertex.position.x-leftX)/uiElementWeight);
            vertexList[i] = uiVertex;
        }
    }
}