Protocols

Protocol extending UIScrollViewDelegate to adjust the scrolling of a given view to mimic a parallax motion between the two views.

Default implementations are given for parallaxScrollViewDidScroll(_:) on all adopters, and for configureParallaxScrollInset(_:) for UIViewControllers.

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public protocol ParallaxScrollable: UIScrollViewDelegate

Definition of an object for adding KVO and NSNotificationCenter obeservations to pure Swift classes.

NSObjects implement a method called methodSignatureForSelector: which converts from strings to methods. Pure Swift classes do not have this method so cannot inherently perform KVO or observe NSNotificationCenter posts. Rather than making a Swift class inherit from NSObject, which introuduces unnecessary features, an Observer can be retained which performs an arbitrary block on copmletion.

Two default implementations are provided, NotificationObserver and ObjectObserver for NSNotificationCenter observing and keypath observing respectively.

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public protocol Observer

Protocol to be adopted by a class that gives easy loading of UIViewControllers from multiple UIStoryboards.

Two enum types are specified that should be used to identify each UIViewController and the Storyboard from which it can be loaded. The app specific adopter should then implement:

• storyboardIdentifierForViewControllerIdentifier(_:)

typically using a switch statement, to ensure exhaustive coverage of all UIViewControllers declared at compile time. There is a defualt implementation for

• instantiateViewControllerForIdentifier(_:bundle:).

that should not need to be overriden.

There are defualt implementations for

• storyboardNameForIdentifier(_:)
• viewControllerNameForIdentifier(_:)

where the enum types are backed by strings. These return the enum rawValues in those implementations.

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public protocol StoryboardLoader

Protocol defining the requirements of an object to provide a ‘User Friendly’ string, such as ‘Your device is not connected to the internet.’ not 'NSURLError -1001’.

Extensions are given for:

• NSURLError
• CLError

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public protocol UserFacing