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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

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UIKit, SwiftUI, and macOS

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

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Showing episodes 385 - 408 of 507 in total
  • #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.

  • #114

    In this episode we add looping background music to the game using AVFoundation and AVAudioPlayer. We then add sound effects using Sprite Kit's SKAction. In order to reduce lag, we preload the audio files so that they play instantaneously. We also implement rate limiting to avoid sound effect overload using SAMRateLimit.

  • #113

    In this episode we continue on building GiggleTouch. This time we improve our random number functions, add a "giggler" node with SKSequence and test on a real device to see what kind of frame rate we get.

  • #112

    In this episode I start recreating an old app for toddlers called Giggletouch. In the video I use SpriteKit to render shapes that are subsequently rotated, scaled, and faded. The shapes are drawn with Sketch and random colors are applied to the shape at runtime.

  • #111

    In this episode we take a look at a couple of new features in Xcode 5.1. The first is creating your own Quick Look representations for custom objects, which can be quite a handy feature for visualizing data (such as images, locations, and paths). The second is a new Autolayout constraint in Interface Builder called "Aspect Ratio" which can further help describe your intent when laying out views with Autolayout.

  • #110

    In this episode we fix the problem of a scroll view blocking touches to a UITableViewCell by forwarding touch events from the scroll view and onto a delegate, which manages the cell's highlighted state properly.

  • #109

    In this episode we add Core Data to our Weight Tracker application, but we lean on a new library called MDMCoreData to set up our Core Data stack for us. Using MDMCoreData we can get a sensible parent/child context set up where the main context is a child of the parent writer context. We also leverage a handy class that dovetails with NSFetchedResultsController to display records in a UITableView.

  • #108

    UIStoryboards can help visualize your screen flow and even describe how to transition between view controllers using segues. In this episode I'll show you how you can take advantage of built-in support to unwind segues to back to where you came from. I'll show the automatic way as well as how to manually unwind a segue.

  • #107

    In this episode I customize UITableViewCell to provide swipe to reveal behavior, similar to Mail.app. We use UIScrollView's delegate methods to ensure that we never land mid-way through the swipe, raise notifications to make sure only one cell is open at a time, and we use a help app called Reveal to assist us in visualizing the view hierarchy.

  • #106

    In this episode I cover how to extend UITableViewCells to provide a swipe action, marking an item as read or unread. Combined with a nifty little progress animation, this adds functionality to your table view cells without requiring extra buttons or action sheets.

  • #105

    In this episode we examine the difference between strong and copy semantics for properties, and why you'd favor copy for types such as NSString and NSArray.

  • #104

    In this episode we tackle how to implement an ever increasing trend in iOS 7 app design: blur. We start by doing it the "easy" way using UIToolbar, then move on to a more custom and flexible approach using our own blurred image.

  • #103

    In this episode we wrap up our refactoring of a complex view controller, this time introducing a model, factoring out a new data source class, and more.

  • #102

    In this episode I take a fairly simple application with a single view controller and examine how we can refactor it into more discrete parts.

  • #101

    In this episode we look at a powerful built-in Foundation class called NSPredicate. With predicates we can easily filter large collections of data based on values contained in the collection.

  • #100

    In our special 100th episode I dive into a fun little class called CAEmitterLayer. Using this class we can create cool particle effects such as fire, water, smoke, clouds, or a fountain of stars.