PhotoGalleryCropping.swift

//
//  PhotoGalleryCropping.swift
//
//  Created by Vincent Narbot on 7/23/15.
//  Copyright (c) 2015 Vincent Narbot. All rights reserved.
//

import Foundation
import UIKit

class PhotoGalleryCropping : NSObject {

    func cropToSquare(image: UIImage) -> UIImage {
        var positionX: CGFloat = 0.0
        var positionY: CGFloat = 0.0
        var width: CGFloat = image.size.width
        var height: CGFloat = image.size.height

        if width > height {
            //Landscape
            positionX = -((height - width) / 2.0)
            width = height
        } 
        else if width < height {
            //Portrait
            positionY = ((height - width) / 2.0)
            height = width
        }
        else{
            //Already Square
        }
        
        var cropSquare = CGRectMake(positionX, positionY, width, height)
        var imageRef = CGImageCreateWithImageInRect(image.CGImage, cropSquare)
        return UIImage(CGImage: imageRef, scale: UIScreen.mainScreen().scale, orientation: image.imageOrientation)!
    }

}