Implementing ZBar Barcode scanner Swift 2.0

Implement ZBar in Swift.md

Took inspiration from https://gist.github.com/wszdwp/205dcccbf096c21f6288

You can refer to this as an updated verion of https://gist.github.com/wszdwp/205dcccbf096c21f6288

Podfile

use_frameworks!

pod 'ZBarSDK'

ScanViewController.swift

protocol ScanViewControllerDelegate: NSObjectProtocol {
    func scanViewController(scanViewController: ScanViewController, didFindBarcode barcode: String)
}

extension ZBarSymbolSet: SequenceType {
    public func generate() -> NSFastGenerator {
        return NSFastGenerator(self)
    }
}

class ScanViewController: ZBarReaderViewController, ZBarReaderDelegate {

    weak var delegate: ScanViewControllerDelegate?

    override func viewDidLoad() {
        super.viewDidLoad()

        self.readerDelegate = self
        self.supportedOrientationsMask = 0
        self.readerView.zoom = 1.0
        self.modalInPopover = false
        self.showsZBarControls = false

        self.scanner.setSymbology(ZBAR_UPCA, config: ZBAR_CFG_ENABLE, to: 1)
    }


    // MARK: - ZBarReaderDelegate

    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        let results: NSFastEnumeration = info[ZBarReaderControllerResults] as! NSFastEnumeration
        var symbolFound : ZBarSymbol?
        for symbol in results as! ZBarSymbolSet {
            symbolFound = symbol as? ZBarSymbol
            break
        }

        delegate?.scanViewController(self, didFindBarcode: String(symbolFound!.data))
    }

}