Programming language: Swift
License: MIT License
Tags: Text    
Latest version: v10.1.0

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Marky Mark

build status codecov Marky Mark is a parser written in Swift that converts markdown into native views. The way it looks it highly customizable and the supported markdown syntax is easy to extend.

[[Screenshot](Readme_Assets/example1-thumb.png)](Readme_Assets/example1.png) [[Screenshot](Readme_Assets/example2-thumb.png)](Readme_Assets/example2.png) [[Screenshot](Readme_Assets/example3-thumb.png)](Readme_Assets/example3.png)


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


  • iOS 8.0+
  • Xcode 8.0+


CocoaPods 1.0.0+ is required to build MarkyMark

To integrate MarkyMark into your Xcode project using CocoaPods, specify it in your Podfile:

pod "markymark"

Alternatively, add MarkyMark to your project using Swift Package Manager using:


Simple usage

View with default styling

let markDownView = MarkDownTextView()
markDownView.text = "# Header\nParagraph"

View with modified styling

Markymark has many styling options, please check the examples in the styling section of this readme. A simple example:

let markDownView = MarkDownTextView()
markDownView.styling.headingStyling.textColorsForLevels = [
    .orange, //H1 (i.e. # Title)
    .black,  //H2, ... (i.e. ## Subtitle, ### Sub subtitle)

markDownView.styling.linkStyling.textColor = .blue
markDownView.styling.paragraphStyling.baseFont = .systemFont(ofSize: 14)
markDownView.text = "# Header\nParagraph"

Supported tags in the Default Flavor

Note: Different tags can be supported by either extending the ContentfulFlavor (default) or by implementing a class that comforms to Flavor and implement the required Rule's

# H1
## H2
### H3
#### H4
##### H5
###### H6

- item
    - item
* item
    * item
+ item
    + item
a. item
b. item
1. item
2. item

~~Strike through~~

![Alternative text](image.png)

[Link text](https://www.example.net)


Customizing default style

Default Styling instance

var styling = DefaultStyling()
Paragraphs (regular text)

Markdown example: Some text

styling.paragraphStyling.baseFont = .systemFont(ofSize: 14)
styling.paragraphStyling.textColor = .black
styling.paragraphStyling.contentInsets = UIEdgeInsets(top:0, left: 0, bottom: 5, right: 0)  
styling.paragraphStyling.lineHeight = 4
styling.paragraphStyling.isBold = false
styling.paragraphStyling.isItalic = false
styling.paragraphStyling.textAlignment = .left

Markdown example: # Title or ## Subtitle etc.

styling.headingStyling.fontsForLevels = [
    UIFont.boldSystemFontOfSize(24), //H1
    UIFont.systemFontOfSize(18),     //H2
    UIFont.systemFontOfSize(16)      //H3, ... (last item will be next levels as well)

styling.headingStyling.colorsForLevels = [
    .red, //H1
    .black, //H2, ... (last item will be next levels as well)

// Margins
styling.headingStyling.contentInsetsForLevels = [
    UIEdgeInsets(top: 5, left: 0, bottom: 15, right: 10), // H1
    UIEdgeInsets(top: 5, left: 0, bottom: 5, right: 10) //H2, ... (last item will be next levels as well)

styling.headingStyling.isBold = false
styling.headingStyling.isItalic = false
styling.headingStyling.isUnderlined = false
styling.headingStyling.textAlignment = .left

Markdown Example [Google](http://www.google.com)

styling.linkStyling.textColor = .black
styling.linkStyling.baseFont = nil // Default: nil. Setting baseFont to nil will inherit font from paragraphStyling

styling.linkStyling.isBold = false
styling.linkStyling.isItalic = false
styling.linkStyling.isUnderlined = true
List styling

Markdown Example:

- List item 1
- List item 2
- Nested List item
// By default a font will be used with the bullet character `•`. Use the follow properties to configure it's size and color:
styling.listStyling.bulletFont = .systemFont(ofSize: 14)
styling.listStyling.bulletColor = .black

// Bullets can also be images for more complex styling. When setting images, bullet font and color won't be used anymore
// Array of images used as bullet for each level of nested list items
styling.listStyling.bulletImages = [
    UIImage(named: "circle"),
    UIImage(named: "emptyCircle"),
    UIImage(named: "line"),
    UIImage(named: "square")

// Size of the images
styling.listStyling.bulletViewSize = CGSize(width: 16, height: 16)

styling.listStyling.baseFont = .systemFont(ofSize: 14)
styling.listStyling.contentInsets = UIEdgeInsets(top: 0, left:  0, bottom: 10, right: 10)

//Amount of space underneath each list item
styling.listStyling.bottomListItemSpacing = 5

// Number of pixels to indent for each nested list level
styling.listStyling.listIdentSpace = 15

styling.listStyling.textColor = .black

Styling is also possible for:


Please check the DefaultStyling class for more information

Advanced usage

Advanced usage is only needed for very specific cases. Making subsets of styling, making different styling combinations, supporting different Markdown rules (syntax) or modifying certain views after that have been generated.

Custom styling objects

struct CustomMarkyMarkStyling: Styling {
    var headerStyling = CustomHeaderStyling()
    var paragraphStyling = ParagraphStyling()
    var linkStyling = ListStyling()

    var itemStylingRules: [ItemStyling] {
        return [headerStyling, paragraphStyling, linkStyling]  

You can implement CustomHeaderStyling by checking how other Styling objects have been implemented, like `HeaderStyling. Make sure your CustomHeaderStyling comforms to all styling rules you'd like your custom styling to support. i.e. comform to TextColorStylingRule to support textStyle of your custom styling.

Each styling rule can be applied to a markDownItem by comforming to ItemStyling and implement the required method like this:

public func isApplicableOn(_ markDownItem: MarkDownItem) -> Bool {
    return markDownItem is HeaderMarkDownItem

This will let the mechanism know it should apply your styling to a HeaderMarkDownItem

You can inject your new styling object by passing it to the constructor of the MarkdownTextView

MarkDownTextView(styling: CustomMarkyMarkStyling())

Adding your own rules

Adding a new rule requires three new classes of based on the following protocol:

  • Rule that can recoginizes the desired markdown syntax
  • MarkDownItem for your new element that will be created by your new rule
  • LayoutBlockBuilder that can convert your MarkDownItem to layout

Add the rule to MarkyMark


Or when using the MarkdownTextView:

markdownTextView.add(rule: MyCustomRule())

Add the block builder to your layout converter


Or when using the MarkdownTextView use either of these options (depending on the configuration view or attributedString):


If needed you can also add a custom styling class to the default styling


Converter hook

The converter has a callback method which is called every time a MarkDownItem is converted to layout.

converter.didConvertElement = {
    markDownItem, view in
    // Do something with markDownItem and / or view here

When using the MarkdownTextView

markDownTextView.onDidConvertMarkDownItemToView = {
    markDownItem, view in


Link behavior

By default Markymark opens URL's using UIApplication.shared.delegate.open(_:open:options). links will only be openened when this method is implemented. Markymark allows changing this behavior by passing a custom URLOpener, an object that conforms to the URLOpener protocol.

let markDownView = MarkDownTextView()
markDownTextView?.urlOpener = MyCustomerURLOpener()

Using Markymark in Extensions

Markymark also supports usage the a Today extension. By default tapping url's is not working, since Extensions don't have access to UIApplication.shared, in order to support links you can pass a different url opener to a MarkyDownTextView. See the Example project for a working example:

markDownTextView?.urlOpener = ExtensionContextURLOpener(extensionContext: self.extensionContext)


M2mobi, [email protected]


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

*Note that all licence references and agreements mentioned in the Marky Mark README section above are relevant to that project's source code only.