Get ready because this may be a prett nooby question.
Lets look at an app like twitter. You can post a tweet and others can view if from their phone. How ? It uploads and retrieves to and from a database.
Say I wanted to create an app like twitter where you can share pictures and it shows up in someone's feed... How would that work?
In xcode, how can I create an app that uploads an app to a database and another user can press a Button to retrieve it. Is there a database API or service?
I'm just kind of stuck on this, I'm not sure what the correct way is. How can I upload data to a database so another user can see it in their app?
I'm not asking for code, just links, simple steps, APIs? I just don't know how it works and can't really find resources because I don't know the right terminology...
Would uploading to core data then syncing Core data with a database (again what database can I use?) be easy and the best way to do it?
Update:
Ok, so you have given me some great answers. php files on web services / servers, could you point me towards a book (on amazon) or something that can guide me through this whole process. I want to start up and work my way through this, I am not sure which is the best way, all these possibilities overwhelm me!
So any big resources that can really help me understand? I dont mind even starting with just uploading a string to a web service backend and retrieving it!
Thanks!