DDHCustomTransition

Helper classes to make basic view controller transitions easier

Installation

Add CustomTransition.swift to your project.

Usage

1. Create an instance of NavigationControllerDelegate and set to the delegate property of an UINavigationController.
2. Make the view controllers participating in the transition conforming to the TransitionInfoProtocol protocol.
3. There is no step three.

TransitionInfoProtocol

The TransitionInfoProtocol defines two required and one optional methods:

// Return the views which shoud be animated in the transition
func viewsToAnimate()->[UIView]
// Return a copy of the view which is passed in. The passed in view is one of the views to animate
func copyForView(subView:UIView)->UIView
/* Optionally return the frames for the views which should be
animated. This is needed sometimes because for example
with custom container view contrllers the transitioning code
can't figure out where on screen the view is actually visible
when loaded. */
optionalfunc frameForView(subView:UIView)->CGRect

Let's say you want to animate a image view from the first view controller to the position of the second view controller (see the gif and the demo project). In the first view controller the protocol conformance could look like this:

import UIKit
classViewController:UIViewController,TransitionInfoProtocol{@IBOutlet weak varimageView:UIImageView!@IBOutlet weak varlabel:UILabel!func viewsToAnimate()->[UIView]{return[imageView, label]}func copyForView(subView:UIView)->UIView{if subView == imageView {letimageViewCopy=UIImageView(image: imageView.image)
imageViewCopy.contentMode = imageView.contentMode
imageViewCopy.clipsToBounds =truereturn imageViewCopy
}elseif subView == label {letlabelCopy=UILabel()
labelCopy.text = label.text
labelCopy.font = label.font
labelCopy.backgroundColor = view.backgroundColor
return labelCopy
}returnUIView()}}

In the second view controller it could look like this:

import UIKit
classDetailViewController:UIViewController,TransitionInfoProtocol{@IBOutlet weak varimageView:UIImageView!@IBOutlet weak varlabel:UILabel!func viewsToAnimate()->[UIView]{return[imageView, label]}func copyForView(subView:UIView)->UIView{if subView == imageView {letimageViewCopy=UIImageView(image: imageView.image)
imageViewCopy.contentMode = imageView.contentMode
imageViewCopy.clipsToBounds =truereturn imageViewCopy
}elseif subView == label {letlabelCopy=UILabel()
labelCopy.text = label.text
labelCopy.font = label.font
labelCopy.backgroundColor = label.backgroundColor
return labelCopy
}returnUIView()}}

Author

Dominik Hauser

App.net: @dasdom

Twitter: @dasdom

swiftandpainless.com

Licence

MIT