https://protobuf.dev/reference/objective-c/Recent content in Objective-C Reference on Protocol Buffers DocumentationHugoenhttps://protobuf.dev/reference/objective-c/objective-c-generated/Mon, 01 Jan 0001 00:00:00 +0000https://protobuf.dev/reference/objective-c/objective-c-generated/Any differences between proto2, proto3, and Editions generated code are highlighted. You should read the proto2 language guide and/or proto3 language guide and/or the Editions guide before reading this document. Compiler invocation The protocol buffer compiler produces Objective-C output when invoked with the --objc_out= command-line flag. The parameter to the --objc_out= option is the directory where you want the compiler to write your Objective-C output. The compiler creates a header file and an implementation file for each .