Latest Posts

Refactoring the Forecast View Model

Mastering MVVM with SwiftUI

In this episode, we refactor the ForecastViewModel struct and the ForecastCellViewModel struct. The ForecastViewModel struct drives the ForecastView, the bottom section of the LocationView. Let's get to work.

in Model-View-ViewModel

Refactoring the Current Conditions View Model

Mastering MVVM with SwiftUI

In this episode, we refactor the CurrentConditionsViewModel struct. Remember that the CurrentConditionsViewModel struct drives the CurrentConditionsView, the top section of the LocationView. The changes we need to make are small.

in Model-View-ViewModel

Setting Up A Proxy Server with Swift and Vapor

In yesterday's episode, I wrote about protecting your application's secretes with a proxy server. In today's episode, I show you how to set up a proxy server with Swift and Vapor.

in Vapor

Protecting Secrets with a Proxy Server

Most of the services your application interacts with require authentication. Authentication through a secret, an API key or a client secret, is a commonly used method. Your application includes the secret in the request it sends to the service. That is only possible if your application has access to the secret at runtime.

in Security

Avoiding Code Duplication

Mastering MVVM with SwiftUI

In the previous episode, we used the MeasurementFormatter class to format the raw values the Clear Sky API returns. This is convenient and we use the MeasurementFormatter class several more times in the next few episodes. In this episode, we create an elegant API that wraps around the MeasurementFormatter API to avoid code duplication.

in Model-View-ViewModel

Refactoring the Location Cell View Model

Mastering MVVM with SwiftUI

With the WeatherService protocol in place, we can refactor the view models that need to provide their views with weather data. In this episode, we focus on the LocationCell by refactoring the LocationCellViewModel class.

in Model-View-ViewModel

Injecting Base URL and API Key

Mastering MVVM with SwiftUI

In the previous episode, we hard-coded the base URL and the API key of the Clear Sky API in the WeatherClient class. I'm not a fan of hard-coding configuration details. In this episode, we explore an alternative approach.

in Model-View-ViewModel

Fetching Weather Data

Mastering MVVM with SwiftUI

In this episode, we add the ability to fetch weather data from the Clear Sky API and decode a WeatherData object from the API response. We apply a pattern that should feel familiar by now.

in Model-View-ViewModel

Defining the Weather Data Model

Mastering MVVM with SwiftUI

It is time to focus on one of the core aspects of the weather application we are building, fetching and displaying weather data. Thunderstorm displays placeholder data for the time being. That is something we change in this and the next episodes.

in Model-View-ViewModel

What to Gift Your Programmer Friend?

Being a programmer myself, I know how challenging it can be to find the perfect gift for a fellow coder. Programmers are often quirky with peculiar interests. Finding a gift that speaks to their passions can be, well, challenging. The good news is that there are plenty of options to delight any coder, whether they are a seasoned professional or just starting out.

in Opinion

Decoupling User Defaults

Mastering MVVM with SwiftUI

The user's defaults database acts as the store of the weather application we are building. That is fine, but most objects shouldn't be aware of that implementation detail. The LocationsViewModel and AddLocationViewModel classes are tightly coupled to the UserDefaults class, but that isn't necessary. In this episode, we decouple the LocationsViewModel and AddLocationViewModel classes from the UserDefaults class.

in Model-View-ViewModel

Updating Locations in User Defaults

Mastering MVVM with SwiftUI

In this episode, we revisit the addLocation(with:) method of the AddLocationViewModel class. In that method, the view model stores the location the user selected in the user's defaults database.

in Model-View-ViewModel