Haring is a customizable and extensible Markdown parser for iOS. It supports many of the standard Markdown elements through the use of Regular Expressions. It also allows customization of font and color attributes for all the Markdown elements.

Haring was forked from Ivan Bruel's MarkdownKit which appears to be no longer maintained.

Haring is named after PopArt artist Keith Haring.

Haring is available through CocoaPods. CocoaPods is a dependency manager that automates and simplifies the process of using 3rd-party libraries like Haring in your projects. You can install CocoaPods with the following command:

gem install cocoapods

To integrate Haring into your Xcode project using CocoaPods, simply add the following line to your Podfile:

pod "Haring"

Afterwards, run the following command:

pod install

Haring is available through Carthage. Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage via Homebrew with the following command:

brew update
brew install carthage

To integrate Haring into your Xcode project using Carthage, simply add the following line to your Cartfile:

github "davidlari/Haring"

Afterwards, run the following command:

carthage update

*italic* or _italics_
**bold** or __bold__

# Header 1
## Header 2
### Header 3
#### Header 4
##### Header 5
###### Header 6

> Quote

* List
- List
+ List

`code` or ```code```
[Links](http://github.com/davidlari/Haring/)

In order to use Haring to transform Markdown into NSAttributedString, all you have to do is create an instance of MarkdownParser and call the parse(_) function.

let markdownParser = MarkdownParser()
let markdown = "I support a *lot* of custom Markdown **Elements**, even `code`!"
label.attributedText = markdownParser.parse(markdown)

let markdownParser = MarkdownParser(font: UIFont.systemFontOfSize(18))
markdownParser.automaticLinkDetectionEnabled = false
markdownParser.bold.color = UIColor.redColor()
markdownParser.italic.font = UIFont.italicSystemFontOfSize(300)
markdownParser.header.fontIncrease = 4

To add new Markdown elements all you have to do is implement the MarkdownElement protocol (or descendants) and add it to the MarkdownParser.

import Haring

class MarkdownSubreddit: MarkdownLink {

  private static let regex = "(^|\\s|\\W)(/?r/(\\w+)/?)"

  override var regex: String {
    return MarkdownSubreddit.regex
  }

  override func match(match: NSTextCheckingResult,
                             attributedString: NSMutableAttributedString) {
    let subredditName = attributedString.attributedSubstringFromRange(match.rangeAtIndex(3)).string
    let linkURLString = "http://reddit.com/r/\(subredditName)"
    formatText(attributedString, range: match.range, link: linkURLString)
    addAttributes(attributedString, range: match.range, link: linkURLString)
  }

}

let markdownParser = MarkdownParser(customElements: [MarkdownSubreddit()])
let markdown = "**/r/iosprogramming** can be *markdown* as well!"
label.attributedText = markdownParser.parse(markdown)

To run the example project, clone the repo, and run pod install from the Example directory first.

Haring was derived mostly from MarkdownKit by Ivan Bruel. It was created due to the apparent abandonment of MarkdownKit.

MarkdownKit was heavily inspired by TSMarkdownParser and also SwiftyMarkdown.

Special thanks to Michael Brown for helping out with the UTF-16 Escaping/Unescaping.

Haring is available under the MIT license. See the LICENSE file for more info.