WordPress自定义帖子格式？

Question

Is it possible to add custom post formats in WordPress?

The default ones cover most use cases for me, but there are 2 additional types I'd like to add ("file" and "slideshow").

So how can I add those two additional formats?

Answer 1

No, that cannot be done. The Post Formats were never intended to be extended or added to. Please see the following from Post Formats on the WordPress Codex (emphasis mine):

The Post Formats feature provides a standardized list of formats that are available to all themes that support the feature. Themes are not required to support every format on the list. New formats cannot be introduced by themes or even plugins. The standardization of this list provides both compatibility between numerous themes and an avenue for external blogging tools to access this feature in a consistent fashion.