I'm new to xcode and am curious where to begin. Within the app I'm developing I want there to be a function that allows users that are part of sub-groups to upload image files to a collective gallery, but only one at a time. I.E User 1 is prompted that it is their turn to upload, User 2 can't upload an image until User 1 has successfully uploaded theirs... Any ideas on where to start, with this seemingly simple idea?
Xcode: How do I write in turn-based image uploads?
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