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UGUI渐变色如何代码动态更改？
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回复 973
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回复 973
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[AddComponentMenu("UI/Effects/Gradient")]
public class Gradient : BaseMeshEffect
{
[SerializeField]
private Color32 topColor = Color.white;
[SerializeField]
private Color32 bottomColor = Color.black;
public override void ModifyMesh(VertexHelper vh)
{
if (!IsActive())
return;
List<UIVertex> vertices = new List<UIVertex>();
vh.GetUIVertexStream(vertices);
ModifyVertices(vertices);
vh.Clear();
vh.AddUIVertexTriangleStream(vertices);
}
public void ModifyVertices(List<UIVertex> vertices)
{
if (!IsActive() || vertices.Count <= 0)
{
return;
}
for (int i = 0; i < vertices.Count;)
{
float bottomY = vertices[i].position.y;
float topY = bottomY;
float dis = 1f;
for (int k = 1; k < 6; k++)
{
float y = vertices[k + i].position.y;
if (y > topY)
{
topY = y;
}
else if (y < bottomY)
{
bottomY = y;
}
}
dis = topY - bottomY;
for (int k = 0; k < 6; k++)
{
UIVertex vertText = vertices[k + i];
vertText.color = Color32.Lerp(bottomColor, topColor, (vertText.position.y - bottomY) / dis);
vertices[k + i] = vertText;
}
i += 6;
}
}
public void SetColor(Color top, Color bottom)
{
topColor = top;
bottomColor = bottom;
}
}
我在外部通过SetColor函数更改颜色Inspector面板中的颜色更改了，但是UI显示颜色没有更改，我觉得应该再给vertText.color赋值，老师这个应该怎么赋值呢？
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public class Test : MonoBehaviour { public GameObject test; float timer; // Use this for initialization void Start () { } // Update is called once per frame void Update () { timer += Time.deltaTime; if (timer >= 2) { //if (timer >= 2 && timer < 2.02f) //{ // test.gameObject.SetActive(false); // test.GetComponent<Gradient>().SetColor(Color.yellow, Color.white); //} //if (timer >= 2.03f) //{ // test.gameObject.SetActive(true); //} GetComponent<Gradient>().SetColor(Color.yellow, Color.red); } } }我是在外部这样调用的，但是并没有输出，没有进入那个函数，用上这种先隐藏再打开他就会更新显示，老师这是什么原因呢？
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