如何在導入WWW後單位更改sprite的像素？

Question

我目前做一個關卡編輯器，其中用戶從文件導入瓷磚，目前它的工作原理，不同的是我想每個單位像素每個導入精靈更改爲32

這裏其實是我的代碼：

//Get tiles from file 
     StreamReader reader = new StreamReader(Application.dataPath + "/../Maps/" + mapName + "/Tiles/tiles.txt"); 
     string line = reader.ReadLine(); 

     while (!string.IsNullOrEmpty (line)) { 
      string[] param = line.Split (','); 
      foreach (TileTexture t in tileTextures) { 
       if (t.name == param [0]) { 
        Sprite sprite = Sprite.Create (t.texture, new Rect (0, 0, t.texture.width, t.texture.height), new Vector2 (0, 0)); 
        sprite.pixelsPerUnit = 32;//THIS LINE DOESNT WORK, GIVES READONLY ERROR 
        Tile tile = new Tile (param[0], sprite, new Vector2(float.Parse(param[1]), float.Parse(param[2]))); 
        tile.sprite.texture.filterMode = FilterMode.Point; 
        tiles.Add (tile); 
       } 
      } 

      line = reader.ReadLine(); 
     } 

Answer 1

在功能Sprite.Create()上我們看到，函數簽名是

public static Sprite Create(Texture2D texture, 
          Rect rect, 
          Vector2 pivot, 
          float pixelsPerUnit = 100.0f, 
          uint extrude = 0, 
          SpriteMeshType meshType = SpriteMeshType.Tight, 
          Vector4 border = Vector4.zero); 

我們看到，我們可以通過pixelsPerUnit作爲可選的參數爲函數的ñ。您只能在此處執行此操作，並且以後無法更改，因爲如您所知，字段pixelsPerUnit爲readonly字段（意味着它無法更改）。所以，你只需要在這裏傳遞32f。正確的代碼是

if (t.name == param [0]) { 
       Sprite sprite = Sprite.Create (t.texture, new Rect (0, 0, t.texture.width, t.texture.height), new Vector2 (0, 0), 32f); 
       Tile tile = new Tile (param[0], sprite, new Vector2(float.Parse(param[1]), float.Parse(param[2]))); 
       tile.sprite.texture.filterMode = FilterMode.Point; 
       tiles.Add (tile); 
      }