The difference between Xcode folder and group (yellow folder)

Folder: Blue folders

Group: Yellow Folder

Folder can only be used as a resource, the entire reference into the project (the contents of folders will be copied directly to bundle package), can not compile the code, that is, the file is referenced in folder form, can not be placed in the Complie sources list.

Group participates in compilation. Generally only in your project is the form of folders, but in the local directory is still scattered in the form of the same, unless you are in the form of a group from the outside reference.

The difference between Xcode folder and group (yellow folder)