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[iOS] Swift 实现 OpenGraph 协议语义解析器类库

What is this?

OG is an OpenGraph parser in Swift.

What's OpenGraph?

You know the smart previews of websites that appear on Facebook or Twitter? OpenGraph is the spec's used to help make that happen.

What's in this?

Included is an Xcode Workspace containing an Xcodeproj for a dynamic library and an Xcode Playground to experiment with.

What do I need to use this?

Requirements include iOS 8, Mac OS X 10.9, tvOS 9.0 or watchOS 2.0 and Swift 2.2 (included with Xcode 7.3.x).

What do I do to start using this?

To start using OG, you can add it to your project by:

UsingCarthage and adding github "zadr/OG" ~> 1.1.1 to your Cartfile .
Using CocoaPods by adding pod 'OG', '~1.1.1 to your Podfile .
Adding the current repository as a git submodule , adding OG.xcodeproj into your xcodeproj , and adding OG.framework as an embedded binary to the Target of your project.

What if I need help or want to help?

If you need any help, or find a bug, pleaseopen an issue! If you'd like to fix a bug or make any other contribution, feel free to open an issue,make a pull request, orupdate the wiki with anything that you found helpful.

What does using this look like?

There are two steps to take:

1. Parse <meta> tags out of html, keeping track of any relevant OpenGraph meta tags. To help with this, OG provides a barebones parser:

let parser = Parser() let metaTagTracker = MetaTagTracker() parser.onFind = { (tag, values) in     if !metaTagTracker.track(tag, values: values) {         print("refusing to track non-meta tag /(tag) with values /(values)")     } }  let success = parser.parse(html)

2. Turn a dictionary of attributes into an OpenGraph metadata object:

if success, let tag = Metadata.from(metaTagTracker.metadata) {     print(tag) }

What do I do after that?

Probably, put a preview of the website on screen. To help with this, every OpenGraph Metadata object has a title , an imageUrl , and a url of what to open upon tap or click.

原文 https://github.com/zadr/OG

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