I am using git with Xcode but when i commit files using Xcode (not command line) after committing and pushing to remote, when i use git status this is the result.
What are Untracked Files. What should i do with them?
And what about Changes not staged for commit part? What are they?
These untracked files are files that have been added to your directory structure (e.g. it would appear that you did a pod install), but you have neither added them to source control nor told git to ignore them. (I would tell git to ignore them, personally.)
But you have to decide whether you want to add the Pods directory to your repo or whether you'd like to ignore them. See https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control. (I personally don't put Pods into source control, just the Podfile and Podfile.lock. There are many opinions on that topic, though.)
Re the .DS_Store, we often have a ~/.gitignore_global that tells it to ignore those, too. Once you tell it to ignore these, they will be removed from the “untracked” files list. See .gitignore all the .DS_Store files in every folder and subfolder.
Re the unstaged .DS_Store it looks like your repo already had that one .DS_Store in the repo. I would suggest removing it from the repo. See How can I Remove .DS_Store files from a Git repository?.
In short, it looks like you have a project with no .gitignore file (or it is missing entries). It also looks like you don’t have a ~/.gitignore_global to ignore .DS_Store files.
For an example of a .gitignore that you might use for Swift projects, see https://github.com/github/gitignore/blob/master/Swift.gitignore (though, like I said, I generally would uncomment the Pods from that particular .gitignore).
