Simple Image Gallery App iOS - Local Gallery Image Selection

I need a simple iOS image gallery app capable of 1. sending and receiving images from a server via POST/GET request 2. saving image files in Core Data (++ if allowing simple manipulating like resizing, rotating and cropping) 3. allowing login with username and password This is for a course project. The use case is as follows: - the user is required to log in using username and password combination - the user selects two images (image A and Image B) from Photos. - the system automatically resizes them (e.g. to 512-by-512 pixels) and saves them locally in Core Data - the user can then select to merge them (the merging process actually happens in the cloud), so the system just needs to send the resized images (resized Image A and resized Image B) to API - a server sends back the merged image data (base64) - the system saves the merged image locally - the user can view all previously selected and received images in its Gallery (resized Image A, resized Image B, merged image, resized Image A (1), resized Image B (1), merged image (1), ... )