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9:29
What Is the Main Thread
Swift and Cocoa Essentials
Even though threading and concurrency are more advanced concepts, you need to understand the basics regardless of your level of experience. The devices we develop applications for are powered by multicore processors and it's important to take advantage of that power.
in Fundamentals
12:02
Threads, Queues, and Concurrency
Swift and Cocoa Essentials
It can be challenging or even overwhelming to prepare for a job interview or project meeting. The number of subjects you need to be familiar with as a developer is staggering. Mastering the fundamentals of the platform you're developing software for should always be a key focus area. That is why a significant portion of the content published on Cocoacasts focuses on the fundamentals of Swift and Cocoa development.
in Fundamentals
15:55
Implementing the Day View Model
Building a Weather Application From Scratch
Everything's in place to populate the day view controller. Open DayViewModel.swift. Press the Option key and select DayViewController.swift to open it in the Assistant Editor on the right. Implementing the DayViewModel struct is surprisingly straightforward. We first need to inspect the DayViewController class and figure out what type of data the view model needs to provide to populate its user interface.
in Swift
6:45
Organizing Fonts and Colors
Building a Weather Application From Scratch
The user interface of the day view controller is ready to be populated with weather data. Before we populate the user interface, I'd like to clean up the implementation of the DayViewController class. As I mentioned earlier in this series, object literals are very often an opportunity for improvement. In this episode, I show you how we can improve the implementation of the DayViewController class.
in Swift
12:52
Creating the User Interface of the Day View Controller
Building a Weather Application From Scratch
It's time to create the user interface of the day view controller, the topmost child view controller of the root view controller. In this series, I show you several techniques for building user interfaces. Each of these techniques has its pros and cons. To create the user interface of the DayViewController class, we take advantage of Auto Layout and storyboards. This approach is ideal for building static user interfaces.
in Swift
7:33
Creating the Day and Week View Models
Building a Weather Application From Scratch
Before we can populate the day and week view controllers, we need to create a view model for each view controller. The view models transform the weather data into values the view controllers can present to the user. This is straightforward if you've watched the previous episodes. There are a few details that are worth pointing out, though.
in Swift
14:11
Adding Flexibility With Protocols
Building a Weather Application From Scratch
At the end of the previous episode, I mentioned that I'm not quite happy yet with the implementation of the RootViewModel class. It passes an instance of the DarkSkyResponse struct to the RootViewController class via a completion handler. The RootViewController class still knows too much about the weather data and its origin.
in Swift
14:28
Handling Errors and Notifying the User
Building a Weather Application From Scratch
In the previous episode, we parsed the JSON response of the Dark Sky API. It's time to integrate the DarkSkyResponse struct into the Rainstorm project. Remember that we didn't handle any errors in the playground. That's also something we tackle in this episode.
in Swift
13:56
Parsing the JSON Response
Building a Weather Application From Scratch
In the early days of Swift, working with JSON was clunky and inelegant. Most developers relied on third party libraries that simplified this tedious task. The Swift team was aware of this gap in the Swift standard library and, after focusing on the foundation of the language first, they introduced the Codable protocol in Swift 4. The Codable protocol is a powerful solution that makes working with JSON quick, easy, and intuitive.
in Swift
13:09
Creating a View Model
Building a Weather Application From Scratch
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.
in Swift
7:54
Removing Object Literals
Building a Weather Application From Scratch
Project hygiene is very important in my opinion and it immediately shows you what type of developer you're working with. The Xcode theme I usually use for development highlights string literals in bright red, showing me when a string literal has made its way into the codebase.
in Swift
5:59
Fetching Weather Data
Building a Weather Application From Scratch
In the previous episode, we laid the foundation of Rainstorm's user interface. Before we continue building the user interface, I'd like to know what the weather data the application will use to populate its user interface looks like. In this episode, we fetch weather data from Dark Sky. The Dark Sky API is very easy to use. Create a Dark Sky developer account if you'd like to follow along. It's free and it only takes a minute.
in Swift