ImagePicker.swift

// ImagePicker encapsulates UIImagePickerViewController functioality providing a convenient
// closure interface for responding to user interactions
import UIKit
import MobileCoreServices

class ImagePicker : NSObject, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
    var didFinishPickingMediaWithInfo:((info:[String:AnyObject]) -> ())?
    var didCancelPickingMedia:(() -> ())?
    
    let imagePicker = UIImagePickerController()
    
    override init() {
        super.init()
        // Set some defaults. These can be overriden by access the
        // imagePicker member variable.
        imagePicker.sourceType = .Camera
        imagePicker.showsCameraControls = true
        imagePicker.allowsEditing = true
        imagePicker.mediaTypes = [kUTTypeImage as String]
        imagePicker.delegate = self
    }
    
    func presentFromViewController(viewController:UIViewController) {
        viewController.presentViewController(imagePicker, animated: true, completion: nil)
    }
    
    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
        self.didFinishPickingMediaWithInfo?(info: info)
    }
    
    func imagePickerControllerDidCancel(picker: UIImagePickerController) {
        self.didCancelPickingMedia?()
    }
}