骨架数据中定义的所有附件都放在皮肤中。不在Spine编辑器皮肤中的附件将在运行时显示在名称为默认的皮肤中，皮肤中的名称与附件名称相同。当Skeleton getAttachment需要按名称查找附件时，会先在骨架的当前皮肤中查找，然后在SkeletonData的默认皮肤中查找。

All attachments defined in the skeleton data are placed in a skin. Attachments that were not in a skin in the Spine editor will appear at runtime in a skin named default, where the name in the skin is the same as the attachment's name. When Skeleton getAttachment needs to find an attachment by name, it first looks in the skeleton's current skin. If the attachment is not found, then it looks in the SkeletonData's default skin.