Unity UGUI 修改好了RectTransform的值但是重启工程后RectTransform会自己变化，如何解决呢
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最近Unity做了一个工程，用了很多Ugui的panel、button之类的，但是有一部分panel和button发生了一个比较奇怪的事情：将RectTransform中的Offset的几个值都设成0，当次启用都没关系，但是保存，关掉工程再重新打开，offset全都变了，怎么才能保持不变呢？不想每次启动工程都重新调整这些按钮和panel的参数。图一为调整保存后，图二就是重新开启工程，就变这样了。。。
因为.meta文件有保存场景信息 ，再次保存会发生冲突，改变位置！
[UGUI]修改顶点
参考链接：
https://blog.csdn.net/jk823394954/article/details/53870779
说明：unity版本5.3，新建一个Image，挂上以下的脚本
一.图形绘制
1.绘制三角形
1 using UnityEngine; 2 using UnityEngine.UI; 3 4 public class TestMesh : BaseMeshEffect { 5 6 public override void ModifyMesh(VertexHelper vh) 7 { 8 vh.Clear(); 9 vh.AddVert(new Vector3(0, 0), Color.red, Vector2.zero); 10 vh.AddVert(new Vector3(0, 100), Color.green, Vector2.zero); 11 vh.AddVert(new Vector3(100, 100), Color.black, Vector2.zero); 12 vh.AddTriangle(0, 1, 2); 13 } 14 }
2.绘制正方形(绘制两个三角形)
1 using UnityEngine; 2 using UnityEngine.UI; 3 4 public class TestMesh : BaseMeshEffect { 5 6 public override void ModifyMesh(VertexHelper vh) 7 { 8 vh.Clear(); 9 vh.AddVert(new Vector3(0, 0), Color.red, Vector2.zero); 10 vh.AddVert(new Vector3(0, 100), Color.green, Vector2.zero); 11 vh.AddVert(new Vector3(100, 100), Color.black, Vector2.zero); 12 vh.AddVert(new Vector3(100, 0), Color.blue, Vector2.zero); 13 vh.AddTriangle(0, 1, 2); 14 vh.AddTriangle(2, 3, 0); 15 } 16 }
3.绘制正方形(绘制一个正方形)
1 using UnityEngine; 2 using UnityEngine.UI; 3 4 public class TestMesh : BaseMeshEffect { 5 6 public override void ModifyMesh(VertexHelper vh) 7 { 8 vh.Clear(); 9 UIVertex[] verts = new UIVertex[4]; 10 11 verts[0].position = new Vector3(0, 0); 12 verts[0].color = Color.red; 13 verts[0].uv0 = Vector2.zero; 14 15 verts[1].position = new Vector3(0, 100); 16 verts[1].color = Color.green; 17 verts[1].uv0 = Vector2.zero; 18 19 verts[2].position = new Vector3(100, 100); 20 verts[2].color = Color.black; 21 verts[2].uv0 = Vector2.zero; 22 23 verts[3].position = new Vector3(100, 0); 24 verts[3].color = Color.blue; 25 verts[3].uv0 = Vector2.zero; 26 27 vh.AddUIVertexQuad(verts); 28 } 29 }
二.相关api
1 using UnityEngine; 2 using UnityEngine.UI; 3 4 public class TestMesh : BaseMeshEffect { 5 6 public override void ModifyMesh(VertexHelper vh) 7 { 8 vh.Clear(); 9 vh.AddVert(new Vector3(0, 0), Color.red, Vector2.zero); 10 vh.AddVert(new Vector3(0, 100), Color.green, Vector2.zero); 11 vh.AddVert(new Vector3(100, 100), Color.black, Vector2.zero); 12 vh.AddVert(new Vector3(100, 0), Color.blue, Vector2.zero); 13 vh.AddTriangle(0, 1, 2); 14 vh.AddTriangle(2, 3, 0); 15 16 //顶点有4个，索引有6个 17 Debug.Log(vh.currentIndexCount); 18 Debug.Log(vh.currentVertCount); 19 20 //PopulateUIVertex，返回顶点数据。当前取值范围：0-3 21 UIVertex vertex = new UIVertex(); 22 vh.PopulateUIVertex(ref vertex, 0); 23 Debug.Log(vertex.color); 24 vh.PopulateUIVertex(ref vertex, 3); 25 Debug.Log(vertex.color); 26 27 //SetUIVertex，设置顶点数据 28 vertex.color = Color.yellow; 29 vh.SetUIVertex(vertex, 3); 30 } 31 }
输出：
Stream流批量操作：
1.AddUIVertexStream，批量添加顶点
1 using System.Collections.Generic; 2 using UnityEngine; 3 using UnityEngine.UI; 4 5 public class TestMesh : BaseMeshEffect { 6 7 public override void ModifyMesh(VertexHelper vh) 8 { 9 vh.Clear(); 10 List<UIVertex> verts = new List<UIVertex>(); 11 12 UIVertex vert0 = new UIVertex(); 13 vert0.position = new Vector3(0, 0); 14 vert0.color = Color.red; 15 vert0.uv0 = Vector2.zero; 16 verts.Add(vert0); 17 18 UIVertex vert1 = new UIVertex(); 19 vert1.position = new Vector3(0, 100); 20 vert1.color = Color.green; 21 vert1.uv0 = Vector2.zero; 22 verts.Add(vert1); 23 24 UIVertex vert2 = new UIVertex(); 25 vert2.position = new Vector3(100, 100); 26 vert2.color = Color.black; 27 vert2.uv0 = Vector2.zero; 28 verts.Add(vert2); 29 30 UIVertex vert3 = new UIVertex(); 31 vert3.position = new Vector3(100, 0); 32 vert3.color = Color.blue; 33 vert3.uv0 = Vector2.zero; 34 verts.Add(vert3); 35 36 List<int> indices = new List<int>() { 0, 1, 2, 2, 3, 0 }; 37 vh.AddUIVertexStream(verts, indices); 38 } 39 }
2.AddUIVertexTriangleStream，批量添加三角形顶点，长度必须是3的倍数
1 using System.Collections.Generic; 2 using UnityEngine; 3 using UnityEngine.UI; 4 5 public class TestMesh : BaseMeshEffect { 6 7 public override void ModifyMesh(VertexHelper vh) 8 { 9 vh.Clear(); 10 List<UIVertex> verts = new List<UIVertex>(); 11 12 UIVertex vert0 = new UIVertex(); 13 vert0.position = new Vector3(0, 0); 14 vert0.color = Color.red; 15 vert0.uv0 = Vector2.zero; 16 verts.Add(vert0); 17 18 UIVertex vert1 = new UIVertex(); 19 vert1.position = new Vector3(0, 100); 20 vert1.color = Color.green; 21 vert1.uv0 = Vector2.zero; 22 verts.Add(vert1); 23 24 UIVertex vert2 = new UIVertex(); 25 vert2.position = new Vector3(100, 100); 26 vert2.color = Color.black; 27 vert2.uv0 = Vector2.zero; 28 verts.Add(vert2); 29 30 vh.AddUIVertexTriangleStream(verts); 31 } 32 }
3.GetUIVertexStream，获取所有顶点数据
1 using System.Collections.Generic; 2 using UnityEngine; 3 using UnityEngine.UI; 4 5 public class TestMesh : BaseMeshEffect { 6 7 public override void ModifyMesh(VertexHelper vh) 8 { 9 vh.Clear(); 10 11 vh.AddVert(new Vector3(0, 0), Color.red, Vector2.zero); 12 vh.AddVert(new Vector3(0, 100), Color.green, Vector2.zero); 13 vh.AddVert(new Vector3(100, 100), Color.black, Vector2.zero); 14 vh.AddTriangle(0, 1, 2); 15 16 List<UIVertex> stream = new List<UIVertex>(); 17 vh.GetUIVertexStream(stream); 18 foreach (UIVertex v in stream) 19 { 20 Debug.Log(v.color); 21 } 22 } 23 }
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