Top-notch video tutorials for Swift developers

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The Working Group

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Bite-sized videos on iOS development.

The iOS landscape is large and changes often. With short, bite-sized videos released on a steady schedule, NSScreencast helps keep you continually up to date.

Up to date with Xcode 15 and iOS 17

We cover the latest and greatest to get you up to speed quickly.

UIKit, SwiftUI, SwiftData, and macOS

In our catalog you'll find a wide variety of topics and UI frameworks.

Swift Language

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  • Authenticating users and protecting routes


    Build a Vapor Backend

    In this episode we will explore how to use AsyncRequestAuthenticator types, such as AsyncBasicAuthenticator and AsyncBearerAuthenticator. We’ll see how to compose these to support multiple authentication strategies and how to protect certain routes to require authenticated users.

  • Create a User with a validated & hashed password


    Build a Vapor Backend

    This episode will introduce a new model for a User that will contain validations to ensure the email address format is correct (using a built-in regular expression) and that the password length is good and secure. We'll also ensure to hash the password with bcrypt before storing it in the database. Finally we'll make a custom Response model for our User so that we don't reveal internal fields to clients.

  • Creating Songs with a Custom Payload Struct


    Build a Vapor Backend

    In this episode, we create a form to create songs from our API by implementing a create route. We use a payload struct to normalize and validate user input for song title and artist name. We also ensure that duplicate artists are not created by using a custom comparison method. Finally, we create the artist and song in the database and return the newly created song. We also configure the JSON output to use snake case instead of camelcase for our default encoder and decoder for our Vapor app.

  • Routing and Controllers


    Build a Vapor Backend

    In this episode, we explore Vapor routing more deeply. We set up a route to fetch a band by its slug, handling async operations and errors. After testing, we refactor with a findBySlug method for reusability. We add a route to fetch songs for a band and discuss avoiding inefficient querying. To organize the code, we create BandsController and SongsController to group routes.

  • Create Fluent Models with Parent/Child Relationships


    Build a Vapor Backend

    Now that we have our database setup, we can create our models. We'll start by examining the Model and Content protocols, then implement the necessary properties decorated with Fluent's property wrappers to denote primary keys, fields, and foreign keys.

  • Understanding Fluent Migrations


    Build a Vapor Backend

    In order to evolve a persistent store over time you have to migrate the data. Fluent, the Vapor Framework that offers ORM support for popular databases, has a solution for this. In this episode we will understand how to write migrations, how to revert them and how to evolve your schema over time without losing data.

  • Building a Docker Image for Vapor and Postgres


    Build a Vapor Backend

    Docker is a common choice for running services locally for development as well as server deployment. Vapor comes by default with a working Docker setup, so in this video we will explore how this all works. We'll also explore how to configure the database with Environment variables.

  • Migrating between versions of your model


    Leveraging SwiftData for Persistence

    In this episode we cover migrating our Swift Data models between incompatible versions using custom and lightweight migration.

  • Querying data with the @Query Macro


    Leveraging SwiftData for Persistence

    In this episode we will provide a searchable interface using the @Query and #Predicate macros. We'll discuss how to use localizedStandardCompare instead of lowercase and other limitations of predicates. We'll also implement a solution for adding dynamic data to the query.

  • Editing Relationships with SwiftData


    Leveraging SwiftData for Persistence

    In this episode we'll create a form to add and edit songs for a given artist. This will lean on the technique we used last time with a small workaround required.

  • Building forms to create and edit models with SwiftData


    Leveraging SwiftData for Persistence

    We learn how to build a form in SwiftData. We cover how to use the .sheet modifier to present a new view for creating or editing artist records. We also cover creating the state for the form, presenting the sheet, and creating the form itself. We also implement a scratch model context to ensure that our changes can be discarded if the user taps the Cancel button.

  • Inserting and Deleting records with the ModelContext


    Leveraging SwiftData for Persistence

    This episode discusses how to work with the ModelContext in a SwiftUI app to insert and delete data. The ModelContext can be accessed through the ModelContainer, which is set up in the environment automatically. The @Query macro is used to retrieve artists from the database and iterate over them. We also implement swipe to delete using the onDelete modifier.

  • The @Model Macro


    Leveraging SwiftData for Persistence

    In this episode we will take a look at the new @Model macro, which we can use to decorate our model classes that we want to persist with SwiftData.

  • SwiftData - The Basics


    Leveraging SwiftData for Persistence

    SwiftData is a replacement for CoreData, built entirely for Swift. It leverages the underpinnings of Core Data, but is much simpler to work with. In this video we will cover the first 3 main types you'll need to understand: ModelConfiguration, ModelContainer, and ModelContext.

  • Date formatted() - a Hidden Gem


    With many great features announced each year, it's easy for smaller changes to go without as much fanfare. In this episode we'll take a look at a new way to format dates using the .formatted() API. It's easy to use, expressive, and best of all we don't need to worry about caching formatters anymore!

  • A Look at the New Swift Testing Framework


    In this episode we take a look at the newly announced Swift Testing framework that is currently in preview. This leverages Swift Macros to make tests much more friendly to write, gives you much richer diagnostic information when tests fail, and is generally a welcome improvement over using XCTest. Keep in mind this is a preview at the time of recording and will require a snapshot toolchain of Swift.

  • Implementing a Command Design with Combine


    macOS Mastodon Client

    Last time we left off where keyboard shortcuts weren't quite working the way we wanted. In this episode we take the time to explore the various options we tried and why they don't work. We address this by implementing a key handling system in AppKit and publishing these as commands to SwiftUI using a Combine subject. This wraps up our series on Building a Mastodon client for macOS!

  • Image Gallery Navigation


    macOS Mastodon Client

    In this episode we page between images in a post using some custom navigation buttons. When doing this we encounter an issue with implementing keyboard shortcuts for these buttons where a SwiftUI helper just doesn't work. For the fix we'll have to wait for the next episode.

  • Image Zoom Gesture & Keyboard Shortcuts


    macOS Mastodon Client

    In this episode we handle zooming into images using a gesture on the trackpad or with ⌘+/- on the keyboard.

  • Aligning and Zooming Images


    macOS Mastodon Client

    When tapping on an image, we want to open a new window with that image, but have it expand from the position in the gallery on the post. To do so, we have to do some window manipulation using NSPanel and some frame calculations.

  • Understanding and Fixing Hit Testing Issues


    macOS Mastodon Client

    In this episode we explore a little hit testing problem we have with our custom layout solution. We implement some techniques to help visualize and explain the problem and then ultimately fix it.

  • Opening Windows | macOS Coordinate System


    macOS Mastodon Client

    In this episode we dive a little deeper into how Windows can be opened using SwiftUI, then see how we can drop down to AppKit to customize it further. We'll learn about style masks and the different behaviors we have for positioning the window. Finally we use this knowledge to open a window with a selected image from a post.

  • Laying Out Images


    macOS Mastodon Client

    In this episode we show the post's images, using a custom layout algorithm to position multiple images in the space available for a post. Also, new icon!

  • Auto Login and Sidebar with Translucency


    macOS Mastodon Client

    We add the ability for the app to remember that a user was logged in, auto log them in w/ the saved credentials. We also add a sidebar to display the user's avatar, including a translucency effect that was not obvious at first glance how to implement. Finally we add auto-paging to the app so that the app will continuously fetch the next page when you reach the bottom.