App Store

• Search apps just like the Apple App Store
• View app details and screen shots
• View apps by category, popularity, and recent searches

Installation Instructions

• Clone repo and cd into it
• Open AppStore.xcodeproj
• ⌘ + r to run simulator

Note: Backend is cloud functions. Please allow ~5 seconds to wake up.

Features

• Search apps with live suggestions via UISearchController

  • Each keystroke in search bar cancels pending work item
  • Only make request after 250 ms delay
  • Reduces unnecessary requests

• Smooth scrolling via async loading and (in memory) caching of images

• AppDetailViewController features vertical and horizontal scrolling UICollectionViewCells to emulate real App Store

• Dependency injection:

  • Network layer consists of several single responsibility service protocols
  • Controllers depend on these abstractions
  • Production code uses URLSession implementation of these protocols by default

• Implementation details hidden from classes using factories

• Profiled in Instruments

• Frontend has zero dependencies

• Backend is Express cloud functions