iOS | Atomic Spin

Developer Tools

Switching Child View Controllers in iOS with Auto Layout

How to switch between two child view controllers hosted in a component view that is constrained with auto layout.

Developer Tools

The Easy Way to Switch Container Views in iOS

This is a simple way you can switch between two iOS container views.

iOS / OS X

Continuous Validation for Mobile User Interfaces in iOS

We can automate testing so that our iOS user interface looks the way we expect by taking a screenshot of every view and composing them into a document.

Developer Tools

Adding an iOS Container View in Xcode

An iOS container view allows you to create a reusable component that all of your view controllers can share.

Mobile Apps

expect()ing the Unexpected

While components may work in isolation, subtle assumptions in their designs can lead to surprising failures in combination.

Objective-C

Serialize Asynchronous Operations with ReactiveCocoa

An example of how to use ReactiveCocoa's map and concat operators to serialize a sequence of asynchronous operations.

iOS / OS X

How to Constrain a Square View with Auto Layout in iOS

Constraining a square view in both portrait and landscape with Auto Layout in iOS.

iOS / OS X

Turn Any iOS Task into a Background Task with ReactiveCocoa’s RACSignal

An example of how ReactiveCocoa can be used to turn any task into a background task using a RACSignal that calls endBackgroundTask: when disposed of.

iOS / OS X

Fixing UI Elements that Float Away

The bug appeared when testing on iOS 7 but not iOS 8, which suggested the root cause might be a floating point error with the constraint layout library.

Developer Tools

Specifying the Destination of an Unwind Segue Programmatically

How to programmatically determine the destination of an iOS Unwind Segue by overriding canPerformUnwindSegueAction.

Objective-C

ReactiveCocoa Concepts for Asynchronous Libraries

Using ReactiveCocoa to create an interface to an asynchronous iOS framework or library.

Developer Tools

Custom Animation for an Unwind Segue

What do you do if you want a custom animation for your unwind segue in Xcode?