Interactive Dismiss ViewController - ios

Question

I have a storyboard like that :
Article View is presented from segue and animation :
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
// Get the new view controller using segue.destinationViewController.
// Pass the selected object to the new view controller.
if segue.identifier == "showArticleFromArticles" {
let ViewToShow = segue.destinationViewController as! ArticleView
ViewToShow.articleToShow = ArticleToShow2
ViewToShow.transitioningDelegate = self
}
}
My animation :
class TransitionManager: NSObject, UIViewControllerAnimatedTransitioning, UIViewControllerInteractiveTransitioning, UIViewControllerTransitioningDelegate, UIViewControllerContextTransitioning {
weak var transitionContext: UIViewControllerContextTransitioning?
var sourceViewController: UIViewController! {
didSet {
print("set")
print(sourceViewController)
enterPanGesture = UIScreenEdgePanGestureRecognizer()
enterPanGesture.addTarget(self, action:"panned:")
enterPanGesture.edges = UIRectEdge.Left
let newSource = sourceViewController as! ArticleView
newSource.WebView.addGestureRecognizer(enterPanGesture)
}
}
let duration = 1.0
var presenting = true
var originFrame = CGRectNull
private var didStartedTransition = false
private var animated = false
private var interactive = false
private var AnimationStyle = UIModalPresentationStyle(rawValue: 1)
private var didFinishedTransition = false
private var percentTransition: CGFloat = 0.0
private var enterPanGesture: UIScreenEdgePanGestureRecognizer!
func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
// get reference to our fromView, toView and the container view that we should perform the transition in
let container = transitionContext.containerView()
let fromView = transitionContext.viewForKey(UITransitionContextFromViewKey)!
let toView = transitionContext.viewForKey(UITransitionContextToViewKey)!
// set up from 2D transforms that we'll use in the animation
let offScreenRight = CGAffineTransformMakeTranslation(container!.frame.width, 0)
let offScreenLeft = CGAffineTransformMakeTranslation(container!.frame.width, 0)
// start the toView to the right of the screen
toView.transform = offScreenRight
// add the both views to our view controller
container!.addSubview(toView)
container!.addSubview(fromView)
// get the duration of the animation
// DON'T just type '0.5s' -- the reason why won't make sense until the next post
// but for now it's important to just follow this approach
let duration = self.transitionDuration(transitionContext)
// perform the animation!
// for this example, just slid both fromView and toView to the left at the same time
// meaning fromView is pushed off the screen and toView slides into view
// we also use the block animation usingSpringWithDamping for a little bounce
UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.8, options: UIViewAnimationOptions.TransitionFlipFromRight, animations: {
fromView.transform = offScreenLeft
toView.transform = CGAffineTransformIdentity
}, completion: { finished in
// tell our transitionContext object that we've finished animating
transitionContext.completeTransition(true)
})
}
func transitionDuration(transitionContext: UIViewControllerContextTransitioning?) -> NSTimeInterval {
return duration
}
func startInteractiveTransition(transitionContext: UIViewControllerContextTransitioning) {
interactive = true
// get reference to our fromView, toView and the container view that we should perform the transition in
let container = transitionContext.containerView()
let fromView = transitionContext.viewForKey(UITransitionContextFromViewKey)!
let toView = transitionContext.viewForKey(UITransitionContextToViewKey)!
// set up from 2D transforms that we'll use in the animation
let offScreenRight = CGAffineTransformMakeTranslation(container!.frame.width, 0)
let offScreenLeft = CGAffineTransformMakeTranslation(container!.frame.width, 0)
// start the toView to the right of the screen
toView.transform = offScreenRight
// add the both views to our view controller
container!.addSubview(toView)
container!.addSubview(fromView)
// get the duration of the animation
// DON'T just type '0.5s' -- the reason why won't make sense until the next post
// but for now it's important to just follow this approach
let duration = self.transitionDuration(transitionContext)
// perform the animation!
// for this example, just slid both fromView and toView to the left at the same time
// meaning fromView is pushed off the screen and toView slides into view
// we also use the block animation usingSpringWithDamping for a little bounce
UIView.animateWithDuration(duration, delay: 0.0, usingSpringWithDamping: 0.5, initialSpringVelocity: 0.8, options: UIViewAnimationOptions.TransitionFlipFromRight, animations: {
fromView.transform = offScreenLeft
toView.transform = CGAffineTransformIdentity
}, completion: { finished in
// tell our transitionContext object that we've finished animating
transitionContext.completeTransition(true)
})
}
func containerView() -> UIView? {
return sourceViewController?.view
}
func viewControllerForKey(key: String) -> UIViewController? {
return sourceViewController?.storyboard!.instantiateViewControllerWithIdentifier(key)
}
func viewForKey(key: String) -> UIView? {
return sourceViewController?.storyboard!.instantiateViewControllerWithIdentifier(key).view
}
func initialFrameForViewController(vc: UIViewController) -> CGRect {
return vc.view.frame
}
func finalFrameForViewController(vc: UIViewController) -> CGRect {
return vc.view.frame
}
func isAnimated() -> Bool {
return animated
}
func isInteractive() -> Bool {
return interactive
}
func presentationStyle() -> UIModalPresentationStyle {
return AnimationStyle!
}
func completeTransition(didComplete: Bool) {
didFinishedTransition = didComplete
}
func updateInteractiveTransition(percentComplete: CGFloat) {
percentTransition = percentComplete
}
func finishInteractiveTransition() {
completeTransition(true)
}
func cancelInteractiveTransition() {
completeTransition(true)
}
func transitionWasCancelled() -> Bool {
return didFinishedTransition
}
func targetTransform() -> CGAffineTransform {
return CGAffineTransform()
}
func panned(pan: UIPanGestureRecognizer) {
//print(pan.translationInView(sourceViewController!.view))
switch pan.state {
case .Began:
animated = true
didStartedTransition = true
didFinishedTransition = false
sourceViewController?.dismissViewControllerAnimated(true, completion: nil)
if transitionContext != nil {
startInteractiveTransition(transitionContext!)
}
break
case .Changed:
percentTransition = CGFloat(pan.translationInView(sourceViewController!.view).x / sourceViewController!.view.frame.width)
print(percentTransition)
updateInteractiveTransition(percentTransition)
break
case .Ended, .Failed, .Cancelled:
animated = false
didStartedTransition = false
didFinishedTransition = true
finishInteractiveTransition()
break
case .Possible:
break
}
}
}
From Article View, I call dismiss view like that :
#IBAction func Quit(sender: UIBarButtonItem) {
self.dismissViewControllerAnimated(true, completion: nil)
}
and :
func animationControllerForDismissedController(dismissed: UIViewController) -> UIViewControllerAnimatedTransitioning? {
transition.presenting = false
return transition
}
And i add the PanGesture like that :
let transition = TransitionManager()
self.transition.sourceViewController = self
But Pan Gesture just dismiss the view, and Interactive is not available
Because i call :
self.dismissViewControllerAnimated(true, completion: nil)
during UIPanGestureRecognizer.began
How can I do this ?
I am using Xcode 7, Swift 2, iOS 9
Thanks !

Answer 1

I found the solution :
i should just use
startInteractiveTransition
to instantiate some things
and use :
func updateInteractiveTransition(percentComplete: CGFloat) {
if self.reverse {
print(percentComplete)
self.tovc.view.frame.origin.x = (self.fromvc.view.frame.maxX * (percentComplete)) - self.fromvc.view.frame.maxX
}
}
to custom my transition.

Answer 2

Easy to use, Just inherent Your UIViewController with InteractiveViewController and you are done
InteractiveViewController
call method showInteractive() from your controller to show as Interactive.