OldButGold

Overview
Product Spec
Wireframes
Schema

Overview

Description

An iOS app which allows UCSD students to sell their used items or buy used items from others.

App Evaluation

[Evaluation of your app across the following attributes]

Category: Shopping, Utilities, Lifestyle
Mobile: Mobility is important because students may want to access the trading market on their iphone.
Story: Allow users post about things they want to sell and scroll through and search for items they want.
Market: UCSD students who need to sell or buy used items.
Habit: User can get the habit of checking the app on their phone whenever they want to buy something.
Scope: This app will target at UCSD students for now. In the future, it may be expanded to more campuses.

Product Spec

1. User Stories (Required and Optional)

Required Must-have Stories

Make a post
Provide a title for the post
Provide a description for the post
Provide a image for the post
Provide a price for the post
Prove contact infomartion
Show the posts in the home feed using tableView and scroll bar
allow pull to refresh
Search for the posts

Optional Nice-to-have Stories

2. Screen Archetypes

Home Screen
- User can scroll and see all the item title on this screen.
- User can search an item using keyword.
- User can navigate to Post screen to post their item to sell.
- User can navigate to Item screen to check the detail of an item.
- User can pull to refresh the feeds.
Post Screen
- User can provide a title for the item.
- User can provide an image for the item.
- User can provide a description for the item.
- User can provide a price for the item.
- User can post the item to the feeds.
- User can navigate back to Home screen.
Item Screen
- User can see the description of the item selected.
- User can see the image of the item selected.
- User can navigate back to Home screen.

3. Navigation

Flow Navigation (Screen to Screen)

Home screen
- Post screen
- Item screen
Post screen
- Home screen
Item screen
- Home screen

Wireframes

[BONUS] Digital Wireframes & Mockups

[BONUS] Interactive Prototype

https://marvelapp.com/4711cbd/screen/55948944

Schema

Models

Object: Post

Property	Type	Description
title	String	The title of the item
objectId	String	unique ID for the user's post
author	Pointer to user	The user that posted the item
image	File	The image that describes the post
description	String	The description for the item

Object: User

Property	Type	Description
userId	String	unique ID for the user
userName	String	name of the user
profilePic	File	Avatar

Networking

Home Feed Screen

(Read/GET) Query all the item's titles from the database.

let userID = Auth.auth().currentUser?.uid
ref.child("users").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
// Get user value
let value = snapshot.value as? NSDictionary
let username = value?["username"] as? String ?? ""
let user = User(username: username)

// ...
}) { (error) in
  print(error.localizedDescription)
}

Item Screen

(Read/GET) Query the detail about the item selected.

 let userID = Auth.auth().currentUser?.uid
ref.child("users").child(userID!).observeSingleEvent(of: .value, with: { (snapshot) in
  // Get user value
  let value = snapshot.value as? NSDictionary
  let username = value?["username"] as? String ?? ""
  let user = User(username: username)

  // ...
  }) { (error) in
    print(error.localizedDescription)
}

Post Screen

(Create/POST) Post the new item as an author.

ref.child("users").child(user.uid).setValue(["username": username]) {
  (error:Error?, ref:DatabaseReference) in
  if let error = error {
    print("Data could not be saved: \(error).")
  } else {
    print("Data saved successfully!")
  }
}

ioslimitedincorporation/OldButGold