How to teach Xcode to include all header files in output of static library project?

Question

I followed a tutorial to create a static library project. Then I dragged in my classes and added them to the target.

When I build & run, it creates a libUtils.a file. Upon reveal in Finder the include folder only contains the header file for the first class that Xcode created automatically when I created the project. All other header files are missing.

I double-checked: All the added class files are part of the project and the inspector shows a target membership checkmark for the target project.

Is this a bug in Xcode or must I register all files I create additionally somewhere else?

Answer 1

Add Headers files

Xcode 10.2.1

Project editor -> select a target -> Build Phases -> + Add a new Build Phase -> New Header Phase

The second step is to add .h files

//Build Phases
Project editor -> select a target -> Build Phases -> Headers -> add files to the **public** zone
//or
//Target Membership
Select `.h` file -> Select File Inspectors Tab -> Target Membership -> Select the target and make it **public**

[Target Membership]