CCSpriteBatchNode使用限制

CCSpriteBatchNode islike a batch node: if it contains children, it will draw them in 1single OpenGL call (often known as "batch draw").

A CCSpriteBatchNode canreference one and only one texture (one image file, one textureatlas). Only the CCSprites that are contained in
that texture canbe added to the CCSpriteBatchNode.All CCSprites added to a CCSpriteBatchNode aredrawn
in one OpenGL ES draw call. If the CCSprites are not added toa CCSpriteBatchNode thenan OpenGL ES draw call will be needed for each one,
which is lessefficient.

Limitations:

The onlyobject that is accepted as child (or grandchild, grand-grandchild,etc...) is CCSprite or
anysubclass of CCSprite. eg: particles, labelsand layer can't be added to a CCSpriteBatchNode.
Either all its children areAliased or Antialiased. It can't be a mix. This is because "alias"is a property of the texture, and all the sprites share the sametexture.