I have some Xcode example which uses oxygine-sound library and works great. I want to include this library to my project too. But I can't to do it. In the example it looks like this:
but when I drag oxygine-sound.xcodeproj (I have this file downloaded) I get another picture of hierarchy. I can't create src folder inside that project or maybe I don't need to do it, I don't know. My attempt looks like this:
Why the example project hierarchy looks different from my attempt to make the same?
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but when I drag oxygine-sound.xcodeproj (I have this file downloaded) I get another picture of hierarchy. I can't create src folder inside that project or maybe I don't need to do it, I don't know. My attempt looks like this:

Why the example project hierarchy looks different from my attempt to make the same?