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When working with networking code, most APIs send back optional types (usually an error and one or two other types such as a response and data), but there is no compile-time guarantee that all of these will ...

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In this screencast, you will learn how to use @IBDesignable and @IBInspectable to render and configure your custom views in Interface Builder at design-time.

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In this screencast, we’ll show you how to set up a StackView inside a ScrollView, this will help you to create views that have to show list of related data without use table views or collection views.

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In this screencast, you'll get your feet wet in accessibility and learn how to move around a website using only your keyboard with VoiceOver enabled.

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As of Android P, the FingerprintManager is deprecated in favor of the BiometricPrompt API. In this screencast, we’ll quickly review a previous FingerprintManager implementation and then dive into setting up...

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Generational Analysis with the Allocations Instrument can be used to track down memory growth issues. We're going to be tracking down a memory management issue that caught us here at Big Nerd Ranch by surpr...

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Throwing errors and completion handlers have pros and cons, and can’t be used in all situations. Here we examine some strategies for writing elegant async error-handling code with closures and associated-val...

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In this screencast, you'll earn how to document your Swift code using Xcode’s Markup support, and Jazzy to create an informative API.

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Generics allows for easy code reuse helping you write less code with fewer mistakes. In this video, we’ll learn how and when to use generics in your Swift apps by illustrating examples of problems that gener...

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In this screencast, we will explore how to use Xcode’s Configuration Settings Files - or xcconfig files - and improve our ability to tame the complexity of managing project settings.

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Whether you’ve never written a unit test, or are just looking for a way to add unit tests to some existing troublesome code, this video will walk you through the fundamentals of unit testing on iOS with real...

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When you have a complex view controller view, sometimes it is helpful to break up the view into manageable chunks. In this video we will show how you can use container views to simplify the construction of c...