Foundation.framework是否屬於CoreService層或CocoaTouch層？

Question

可可（觸摸）文件here說：

Cocoa Touch, which includes Foundation and UIKit frameworks, is used for developing applications that run on iOS. 

但核心服務層文件here說：

The Core Services layer contains fundamental system services for apps. Key among these services are the Core Foundation and Foundation frameworks, which define the basic types that all apps use. This layer also contains individual technologies to support features such as location, iCloud, social media, and networking." 

因此，這層Foundation.framework是屬於。

Answer 1

可可（Touch）是層疊疊的全方位保護傘。可可（觸摸）應用層是該堆棧中的特定層，有時簡稱爲應用層。

Core Foundation框架和Foundation框架都是Core Services層的一部分。

正如您所提到的，here是關於這個主題的Apple Documentation。