Hello Transition

//
//  HelloTransition.swift
//  The Top Fives
//
//  Created by Alvin Varghese on 9/13/15.
//  Copyright (c) 2015 I dream Code. All rights reserved.
//

import UIKit
import Foundation

let kToManageReourceVC = "TO_SFSAFARI"
let kToSettingsVC = "TO_HOME"

@objc class HelloTransition : NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerTransitioningDelegate {
    
    var delegate : HelloTransition!
    var transitionTo : String = ""
    
    func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
        return 0.99
    }
    
    func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
        let sourceVC = transitionContext.viewControllerForKey(UITransitionContextFromViewControllerKey)
        let destinationVC = transitionContext.viewControllerForKey(UITransitionContextToViewControllerKey)
        let container : UIView = transitionContext.containerView()!
        let sourceRECT = transitionContext.initialFrameForViewController(sourceVC!)
        
        if self.transitionTo == kToManageReourceVC {
            destinationVC?.view.frame = CGRectMake((sourceVC?.view.frame.size.width)!, 0, sourceRECT.size.width, sourceRECT.size.height)
            container.addSubview((destinationVC?.view)!)
            UIView.animateWithDuration(0.30, animations: {
                sourceVC?.view.frame = CGRectMake(-sourceRECT.size.width, 0, sourceRECT.size.width, sourceRECT.size.height)
                destinationVC?.view.frame = CGRectMake(0, 0, sourceRECT.size.width, sourceRECT.size.height)
                }) { _ in
                    transitionContext.completeTransition(true)
            }
        }
        else  {
            
            destinationVC?.view.frame = CGRectMake(0, 0, sourceRECT.size.width, sourceRECT.size.height)
            UIView.animateWithDuration(0.30, animations: {
                sourceVC?.view.frame = CGRectMake(sourceRECT.size.width *  2, 0, sourceRECT.size.width, sourceRECT.size.height)
                }) { _ in
                    
                    transitionContext.completeTransition(true)
            }
        }
    }

    func animationEnded(transitionCompleted: Bool) {
    }

    func animationControllerForPresentedController(presented: UIViewController, presentingController presenting: UIViewController, sourceController source: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        return self
    }
    
    func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
        self.transitionTo = kToSettingsVC
        return self
    }
}