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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 12 and iOS 14

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

UIKit, SwiftUI, and macOS

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

Swift Language

Increase your knowledge of the Swift language and take advantage of new Swift language features as they are developed.

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Showing episodes 361 - 384 of 498 in total
  • #138

    Finally iOS 8 and Xcode 6 are available and out of NDA and we can cover them on NSScreencast. There are tons of new features to cover, so today I'm just going to pick one: IBDesignable. With IBDesignable you can live preview your custom views so you don't have to stare at empty gray boxes in Interface Builder anymore. Interface Builder just got way more useful!

  • #137

    In this episode we explore the powerful UIKit Dynamics that was introduced with iOS 7. With Dynamics you can simulate real world interactions between your views. We'll go over the basics of collision, gravity, rigid bounds, and leave off with an example of why you shouldn't use it to make games.

  • #136

    In this episode we'll attempt to create the board for the game Connect Four. We'll leverage what we've learned about auto layout and create the connect four board constraints, then we'll draw the view. We have to draw it filled with a bunch of holes, so that we can see objects passing behind it. Using Core Graphics and clipping paths we can accomplish this effect.

  • #135

    What good is a static layout? When specifying layout using constraints, we still need to provide transitions and other animations in our interfaces. We can do this quite easily by just animating between different sets of constraints.

  • #134

    In this episode we explore Apple's Visual Format Language for building Auto Layout Constraints. While a bit strange at first glance, the Visual Format Language can really convey a lot of layout information in just a few characters in comparison to the manual building of NSLayoutConstraints can be.

  • #133

    In this episode we take a look at how to set up auto layout constraints in code, rather than with Interface Builder / Storyboards. Whether you prefer to work in code or storyboards to lay you user interfaces, often times setting things up in code is required. You'll see how to use NSLayoutConstraint to fully specify a layout, and hopefully understand a bit more about how auto layout works.

  • #132

    Realm is a new project that aims to replace Core Data and even SQLite for mobile app persistent storage needs. While an ambitious goal, I like seeing alternatives in this area, as Core Data is not always my favorite framework. In this episode we'll add Realm to a project and store a few rudimentary objects. We'll also see a quick way to query the data in the "realm".

  • #131

    In this episode we wrap up our JSON parsing exploration in Swift by extending the decoding to work with arrays. Doing so cleans up the extraction code significantly.

  • #130

    In this episode we attempt to write a more idiomatic JSON Parsing framework leveraging Swift. To accomplish this we'll lean heavily on Swift's powerful enum features and apply a couple of custom operators to clean up syntax and reduce redundant code.

  • #129

    Parsing JSON (which provides no contracts or type guarantees) can be difficult and tedious in Swift. Many of the problems you are forced to deal with were easier to ignore in Objective-C, but that doesn't mean they weren't present. In this episode we'll take a look at a very manual approach to mapping from a JSON response to a Swift type.

  • #128

    In this episode we take a look at the NSURLSession API from a Swift perspective. We create a class to fetch JSON from an API, and along the way see lazy properties and type aliases.

  • #127

    One of Swift's powerful features is the ability to define custom operators. In this episode we take a look at two examples of custom operators, one for easy regular expression matching, and another for computing the dot product between two vectors.

  • #126

    Continuing on with our Swift exploration, we focus this time on Swift classes. We talk about initializers, inheritance, protocols, type inspection, and more.

  • #125

    In this episode we take a first look at Apple's brand new programming language Swift.

  • #124

    In this episode we delve into the wonderful Objective-C runtime in order to replace method implementations with our own. Using this technique we can add or change behavior to existing classes, which can be extremely useful for Aspect Oriented Programming (logging/benchmarking), or analytics.

  • #123

    In this episode I take a look at a lightweight network library called STHTTPRequst. Specifically I like two features it provides: easy curl logging of outgoing requests, and a test response queue for performing unit tests against canned responses. Whether or not you want to use this library, there are some good things to learn here.

  • #122

    In this episode I cover Facebook's new, shiny animation framework called Pop. With it we explore spring & decay animations that can make your apps feel more alive.

  • #121

    In this episode we continue with our mantle example, this time binding the code to the UI. This involves mapping back to our mantle model for display on the cell, as well as responding to changes using the NSFetchedResultsControllerDelegate protocol.

  • #120

    In this episode we cover a different feature of Mantle, which allows us to serialize our models into Core Data entities. This episode continues where we left off in Episode 116.

  • #119

    In this episode I cover the x-callback-url draft standard, which is an attempt to formalize a way that applications can exchange data back & forth. Using this technique you can have an application expose functionality available to another application. We'll cover parsing URLs to extract out query parameters and how to respond to callbacks in your application.

  • #118

    In this episode we talk about adding support for 1Password when creating your login forms. This is an easy technique that can add a nice touch to your applications if you need to support user login.

  • #117

    In this episode I cover how you can expose your app's functionality through URL schemes. Inter-app communication is something that iOS is somewhat lacking in, but URL schemes can enable some handy integration scenarios.

  • #116

    In this episode we go over a handy little model framework called Mantle. With Mantle we can easily get support for NSCoding, NSCopying, and JSON serialization for our model objects.

  • #115

    In this episode I walk through the process of submitting GiggleTouch to the App Store. Starting with setting the app up to take posed screenshots, requesting certificates, provisioning profiles, and more.