关于Xcode 10 新建 PCH File 步骤

Make new file: ⌘cmd+N

iOS/Mac > Other > PCH File > YourProject-Prefix.pch.

Make sure you display "All" and not "Basic". (Blue buttons)

Project > Build Settings > Search: "Prefix Header".

Under "Apple LLVM 7.0" you will get the Prefix Header key.

Type file directory. e.g: "$(SRCROOT)/$(PROJECT_NAME)/ProjectName-Prefix.pch".

Clean project: ⌘cmd+⇧shift+K

Build project: ⌘cmd+B