Swift JSON Parse

swift-json-parse.swift

import Foundation

// This can go in its own separate swift file - just keeping it here for reference..
struct MyModel {
    let name: String
    let email: String

    static func create( name: String, email: String ) -> MyModel {
        return MyModel( name: name, email: email )
    }
}


class MyCollection {
    var data: Array<MyModel> = []

    class func fetch() -> MyCollection {
        var collection: Array<MyModel> = []

        let path = NSBundle.mainBundle().pathForResource( "myfile", ofType: "json" )
        if( path != nil ) {
            
            let jsonData = NSData.dataWithContentsOfFile( path!, options: .DataReadingMappedIfSafe, error: nil )
            if( jsonData != nil ) {
                
                let jsonObject : AnyObject! = NSJSONSerialization.JSONObjectWithData( jsonData!, options: NSJSONReadingOptions.MutableContainers, error: nil)
                
                if let jsonArray = jsonObject as? NSArray{

                    // Example of iterating through the JSON array we get from the response.
                    jsonArray.enumerateObjectsUsingBlock({ model, index, stop in
                        let name = model["name"] as String
                        let email = model["email"] as String
			let modelStruct = MyModel.create( name, email: email )

                        collection.append( modelStruct )
                    });
                }
            }
        }

        let instance = MyCollection()
        instance.data = collection;

        return instance;
    }
}

Simple example of parsing a JSON string using swift

Assumes there is a file in the app bundle with the name of myfile.json having contents like the below:

[
    {
           "name": "John Doe",
           "email": "john.doe@example.com"
    },
    {
           "name": "Billy Bob",
           "email": "billy.bob@yeehaw.com"
    }
]

Example Usage with a UIViewController having a CollectionView:

import UIKit

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {

    @IBOutlet weak var collectionView: UICollectionView!

    struct CollectionViewSettings {
        static let identifier = "myCell"
    }

    var Items: MyCollection = {
        return MyCollection.fetch()
    }()

    var cellCount = 0;

    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return Items.data.count
    }

    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        var cell = collectionView.dequeueReusableCellWithReuseIdentifier( CollectionViewSettings.identifier, forIndexPath: indexPath) as MyCollectionViewCell
        cell.loadWithItems( Items.data[indexPath.row] )

        return cell
    }
}