问题描述
我正在尝试创建一个对象，该对象将负责创建和显示不同的Sprite，因此我想以编程方式直接访问资产/Sprite，而不是将Sprite拖放到该对象下的层次结构中.
I'm trying to create an object that will be responsible of creating and showing different sprites, so I would like to access directly the assets/sprites programmatically instead of drag and drop a sprite in the hierarchy under that object.
有一种方法可以通过编程方式创建一个新的精灵，并分配我在资产文件夹中拥有的内容?
There's a way to programmatically create a new sprite and assign what I have in the assets folder?
我还想拥有一种数据结构，其中在游戏开始时加载了一些图像，一个数组或一个字典或类似的东西，因此我可以根据需要显示的图像的某些情况进行更改.但是，自从我不熟悉Unity以来，令我感到困惑的是如何创建一个Sprite，并使用Assets文件夹以编程方式对Sprite进行引用.
I also would like to have a sort of data structure with a few images loaded at the start of the game, an array or a dictionary or something like that so I can change based on some situation which images I need to show. But what confuses me since I'm new to Unity is how to create a sprite taking the reference to the sprite programmatically using the assets folder.
编辑进度:
我创建了一个这样的精灵数组:
I've created an array of sprites like this:
public Sprite[] mySprites;
在Unity中，我已在数组中手动添加了精灵(我只是将png拖动到了变量数组中)，因此实际上在这个对象中，我有一个组件，该组件中包含了所有包含精灵的数组
in Unity I've added sprites inside the array manually (I just dragged png's inside the variable array) so actually in this Object I have a Component with this array full of sprites
在组件内部，我也这样做了:
inside the component I also have done this:
public SpriteRenderer renderer;
renderer = transform.GetComponent<SpriteRenderer>();
renderer.sprite = (Sprite)mySprites [0];
在运行游戏之前，我没有任何错误，然后未分配精灵，而我得到了:
I got no error until I run the game, then the sprite is NOT assigned and I got this:
在取消引用时PPtr转换失败！Castin从Texture2D到Sprite！"
"PPtr cast failed when dereferencing! Castin from Texture2D to Sprite!"
即使没有强制转换(Sprite)，我仍然遇到此错误，顺便说一句，我不知道他为什么要告诉我有关Texture2D的信息，因为一切都被设置为sprite
I got this error even without casting (Sprite) and btw I don't know why he is telling my about Texture2D since verything is setted as sprite
推荐答案
以编程方式创建Sprite可能有些困难.您可能需要在内存中创建一个Texture，填充数据，然后将该纹理写入磁盘.之后，您应该能够使用C#的文件或Unity的 WWW.LoadFromCacheOrDownload来阅读该文件.
To create a sprite programmatically might be a little too difficult to do. You'd probably need to create a Texture in memory, fill in the data, and then write that texture on the disk. After that, you should be able to read that using C#'s File, or Unity's WWW.LoadFromCacheOrDownload.
以下是动态创建纹理的方法: http://answers.unity3d.com/questions/9919/how-do-i-create-a-texture-dynamically-in-unity.html
Here is how you would create a texture dynamically: http://answers.unity3d.com/questions/9919/how-do-i-create-a-texture-dynamically-in-unity.html
要以编程方式加载您的精灵(虽然不是动态创建的精灵)，它们必须位于名称为Resources的文件夹下(这是一个特殊文件夹).
To load your sprites programmatically (not the ones created dynamically though), they need to be under a folder with the name Resources (which is a special folder).
即假设您有一个名为MySprite.png的精灵，位于名为Sprites的文件夹下，该文件夹位于名为Resources的文件夹下.然后，您将像这样加载它:
I.e. suppose you have a sprite named MySprite.png under a folder named Sprites which is under a folder named Resources. You would then load it like this:
renderer.sprite = Resources.Load<Sprite>("Sprites/MySprite");
(注意如何不包括Resources文件夹和sprite的扩展名)
(notice how you do not include the Resources folder and the extension of the sprite)
您可以在在运行时加载资源文档中找到更多详细信息./p>
You can find more details in the Loading Resources at Runtime documentation.
我进行了一些搜索，并从此论坛帖子，通常是在您拥有一种类型的列表，然后将其更改为另一种类型时发生的. IE.如果mySprites在某个时候是GameObject []，并且您链接了一堆Sprites，然后将其更改为Sprite [].而且，因为它专门说了Texture2D，所以我假设您的Sprites(或其中的一些)的导入设置被设置为Texture而不是Sprite:
I did some searching and found out from this forum post that usually that happens when you had a list of one type and then changed it into another type. I.e. if mySprites was at some point GameObject[] and you linked a bunch of Sprites, and then changed it to Sprite[]. And since it specifically says Texture2D, I'm assuming that the import settings of your Sprites (or some of them) are set to Texture instead of Sprite:
此外，所有MonoBehaviours已经具有一个名为renderer的字段，该字段的类型为渲染器.我建议您重命名该字段以避免混淆，除非您仅以该示例为例.
Also, all MonoBehaviours have already a field named renderer, which is of type Renderer. I would suggest you rename that field to avoid confusion, unless you only used that as an example.
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