XNA Content.Load如何实现操作？
我只是好奇它是否在每次调用时实际上将资源加载到内存中，或者如果它查找它，发现它是否已加载，如果未加载，则加载一次并仅保留引用，以便第二次调用它只是获取对它的引用？
I'm just curious if it actually loads the asset into memory every time it's called or if it looks it up, finds if it's loaded and if it isn't loaded it loads it once and just keeps references so the second time it's called it just grabs a reference to it?
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它跟踪已经加载的内容，并且如果之前已经加载过，则简单地返回对同一对象的引用（这是每个 ContentManager）。这适用于所有内容，而不仅仅是纹理。
结果是，只要您需要一些内容，您就可以调用
Load，而不必考虑重复。另一个结果是，您永远不应该Dispose从 ContentManager 加载的内容（使用ContentManager.Unload代替）。如果您想了解更多详细信息，查看此问题并回答。
It keeps track of what has already been loaded, and simply returns a reference to the same object if it has been loaded before (this is per-ContentManager). This applies to all content, not just textures.
The upshot is that you can just call
Loadwhenever you need some Content, without having to think about duplication. The other upshot is that you should neverDisposeof content loaded from ContentManager (useContentManager.Unloadinstead).If you want more detail, take a look at this question and answer.