? icon after file names in Xcode

Question

In Xcode, sometimes there is a ?, an A, or an M in a box to the right of the name of a file. What are the meanings of these icons? Will they have some influence on how the project compiles and runs on the simulator or device?

Answer 1

I had the same doubt and after lots of searching I got the answer at this link under "Keep Track of Your Files’ SCM Status" section:

M = Locally modified

U = Updated in repository

A = Locally added

D = Locally deleted

I = Ignored

R = Replaced in the repository

– = The contents of the folder have mixed status; display the contents to see individual status

? = Not under source control

Answer 2

These are version control status labels. M means the file is modified, A means it has been added, and ? means your version control system doesn't know about it yet.