StringAttributes

Swift compatible NSAttributedString builder.

Description

The main idea behind the implementation is that in Swift 4 there is a new NSAttributedStringKey which is used for attributed string keys by String API. So we can create a generic extension for [NSAttributedStringKey: Any] dictionary:

extension Dictionary where Key == NSAttributedStringKey, Value == Any {
    var font: UIFont { ... }
    var foregroundColor: UIFont { ... }
    ...
}

Also we define a typealias for attributed dictionary just for convenience:

public typealias StringAttributes = [NSAttributedStringKey: Any]

Usage

Create string attributes separately from a string

let attributes = StringAttributes {
    $0.foregroundColor = .red
    $0.backgroundColor = .white
    $0.link = URL(string: "http://github.com")
})
let string = NSAttributedString(string: "text", attributes: attributes)

Attributize a string using inline builder initialization

let string = "text".with(StringAttributes {
    $0.foregroundColor = .red
    $0.backgroundColor = .white
    $0.link = URL(string: "http://github.com")
})