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Building a Weather Application From Scratch

Creating a View Model

by Bart Jacobs | Jun 19, 2018 | Swift

Swift 4 Xcode 9 iOS 11

Building a Weather Application From Scratch

1	Introduction
2	Setting Up the Project
3	View Controller Containment
4	Fetching Weather Data
5	Removing Object Literals
6	Creating a View Model
7	Parsing the JSON Response
8	Handling Errors and Notifying the User
9	Adding Flexibility With Protocols
10	Creating the Day and Week View Models
11	Creating the User Interface of the Day View Controller
12	Organizing Fonts and Colors
13	Implementing the Day View Model
14	Writing Unit Tests for the Day View Model
15	Implementing the Week View Model
16	Writing Unit Tests for the Week View Model

The root view controller is currently in charge of fetching weather data from the Dark Sky API. Having a view controller that performs network requests isn't uncommon if the project adopts the Model-View-Controller pattern. The current implementation of the RootViewController class isn't complicated, but that can change as the project grows and evolves. It can eventually lead to a fat and overweight view controller. That's something we absolutely want to avoid.

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