ios - 预加载 SKTextures/SKTextureAtlas 困惑

Question

我已经阅读了此处关于此主题的所有帖子，但似乎都没有回答我的问题。

我的问题是 SKTexture/SKTextureAtlas 何时加载到内存中？

从我读到的内容来看，您需要对使用 [SKTexture preloadTextures: withCompletionHandler:] 这样它就不会随 ARC 一起释放，这对我来说很有意义，因为当没有人保留它时，该对象将在方法结束时被释放。我不明白的是，带有保留它的强指针的 SKTexture 是如何不加载到内存中的，这不会使 [SKTexture preloadTextures: withCompletionHandler:] 变得多余和不必要，因为纹理已经加载到内存中了。我显然遗漏了一些东西，所以任何见解都会很棒。

干杯!

Answer 1

SKTexture Class Reference解释如下:

The texture data is loaded when:

The size method on the texture object is called.

Another method is called that requires the texture’s size, such as creating a new SKSpriteNode object that uses the texture object.

One of the preload methods is called (See Preloading the Texture Data.)

The texture data is prepared for rendering when:

A sprite or particle that uses the texture is part of a node tree that is being rendered.

Once the SKTexture object is ready for rendering, it stays ready until all strong references to the texture object are removed.