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json-swift

A practical JSON parsing library for Swift. It provides a fully typed and validated API surface for working with JSON, including the ability to base64 items with your JSON.

All of the JSON APIs return back of Optional<T>. This allows for easier use for deep indexing.

Also, there is a functional API set for the library as well. For an in-depth overview of that, see: Functional JSON.

Initializing a JSON value

let json : JSON = [
    "stat": "ok",
    "blogs": [
        "blog": [
            [
                "id" : 73,
                "name" : "Bloxus test",
                "needspassword" : true,
                "url" : "http://remote.bloxus.com/"
            ],
            [
                "id" : 74,
                "name" : "Manila Test",
                "needspassword" : false,
                "url" : "http://flickrtest1.userland.com/"
            ]
        ]
    ]
]

Retrieve data from JSON

if let stat = json["stat"].string {
    println("stat = '\(stat)'")
    // prints: stat = 'ok'
}

Retrieve error information from a missing key lookup

let stat = json["stats"]
if let value = stat.string {
    println("stat = '\(value)'")
}
else if let error = stat.error {
    println("code: \(error.code), domain: '\(error.domain)', info: '\(error.userInfo[LocalizedDescriptionKey]!)'")
    // prints: code: 6, domain: 'com.kiadsoftware.json.error', info: 'There is no value stored with key: 'stats'.'
}

Iterate over the contents of an array

if let blogs = json["blogs"]["blog"].array {
    for blog in blogs {
        println("blog: \(blog)")
    }
}

See JSValueTests.Usage.swift for more usage samples.

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A basic library for working with JSON in Swift.

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  • Swift 99.5%
  • Objective-C 0.5%