Snapchat-like swipe navigation between views in Xcode 6 and Swift)

The short version is to use a container view controller with a scrollview inside the controller. You then create separate view controllers for each screen you want in the application, and make those view controllers' parent the container view controller.

A github repo with sample code can be found, here.

You need a pageviewcontroller. This was originally for showing tutorials and stuff but you can put view controllers in there as well. There are tons of tutorials out there and essentially you have to apply a little bit of logic to tell the program what view controller to show it next.

This is a pretty advanced example, but it might be of help to you:

https://github.com/cwRichardKim/RKSwipeBetweenViewControllers

I'm not fond of the version given by lbrendanl because it does not use constraints. We can not custom it like we want. Here is the same version but with constraints :

scrollView is an IBOutlet pined to the controller with 4 constraints with a constant to 0 at each sides to the controller's view.

contentView is also an IBOutlet added as subview of scrollView pined to the scrollView with 4 constraints with a constant to 0 at each sides. It also has an equal height constraint and a width equal constraint. The width equal constraint is removed at runtime and only serves to calm down IB. This view represents the contentView of the scrollView.

UPDATE iOS 9

 func setupDetailViewControllers() {    var previousController: UIViewController?    for controller in self.controllers {        addChildViewController(controller)        addControllerInContentView(controller, previousController: previousController)        controller.didMoveToParentViewController(self)        previousController = controller    }}func addControllerInContentView(controller: UIViewController, previousController: UIViewController?) {    contentView.addSubview(controller.view)    controller.view.translatesAutoresizingMaskIntoConstraints = false    // top    controller.view.topAnchor.constraintEqualToAnchor(contentView.topAnchor).active = true    // bottom    controller.view.bottomAnchor.constraintEqualToAnchor(contentView.bottomAnchor).active = true    // trailing    trailingContentViewConstraint?.active = false    trailingContentViewConstraint = controller.view.trailingAnchor.constraintEqualToAnchor(contentView.trailingAnchor)    trailingContentViewConstraint?.active = true    // leading    let leadingAnchor = previousController?.view.trailingAnchor ?? contentView.leadingAnchor    controller.view.leadingAnchor.constraintEqualToAnchor(leadingAnchor).active = true    // width    controller.view.widthAnchor.constraintEqualToAnchor(scrollView.widthAnchor).active = true}

PREVIOUS ANSWER

    class ContainerViewController: UIViewController {    @IBOutlet var scrollView: UIScrollView!    @IBOutlet var contentView: UIView!    // A strong reference to the width contraint of the contentView    var contentViewConstraint: NSLayoutConstraint!    // A computed version of this reference    var computedContentViewConstraint: NSLayoutConstraint {        return NSLayoutConstraint(item: contentView, attribute: NSLayoutAttribute.Width, relatedBy: NSLayoutRelation.Equal, toItem: scrollView, attribute: .Width, multiplier: CGFloat(controllers.count + 1), constant: 0)    }    // The list of controllers currently present in the scrollView    var controllers = [UIViewController]()    override func viewDidLoad() {        super.viewDidLoad()        initScrollView()    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()    }    func initScrollView(){        contentView.setTranslatesAutoresizingMaskIntoConstraints(false)        contentViewConstraint = computedContentViewConstraint        view.addConstraint(contentViewConstraint)        // Adding all the controllers you want in the scrollView        let controller1 = storyboard!.instantiateViewControllerWithIdentifier("AStoryboardID") as! AnUIControllerViewSubclass        addToScrollViewNewController(controller)        let controller2 = storyboard!.instantiateViewControllerWithIdentifier("AnotherStoryboardID") as! AnotherUIControllerViewSubclass        addToScrollViewNewController(controller2)    }    // The main method, adds the controller in the scrollView at the left of the previous controller added    func addToScrollViewNewController(controller: UIViewController) {        self.addChildViewController(controller)        contentView.addSubview(controller.view)        controller.view.setTranslatesAutoresizingMaskIntoConstraints(false)        // Setting all the constraints         let bottomConstraint = NSLayoutConstraint(item: contentView, attribute: .Bottom, relatedBy: .Equal, toItem: controller.view, attribute: .Bottom, multiplier: 1.0, constant: 0)        let topConstraint = NSLayoutConstraint(item: contentView, attribute: .Top, relatedBy: .Equal, toItem: controller.view, attribute: .Top, multiplier: 1.0, constant: 0)        let widthConstraint = NSLayoutConstraint(item: controller.view, attribute: .Width, relatedBy: .Equal, toItem: scrollView, attribute: .Width, multiplier: 1.0, constant: 0)        var trailingConstraint: NSLayoutConstraint!        if controllers.isEmpty {            // Since it's the first one, the trailing constraint is from the controller view to the contentView            trailingConstraint = NSLayoutConstraint(item: contentView, attribute: .Trailing, relatedBy: .Equal, toItem: controller.view, attribute: .Trailing, multiplier: 1.0, constant: 0)        }        else {            trailingConstraint = NSLayoutConstraint(item: controllers.last!.view, attribute: .Leading, relatedBy: .Equal, toItem: controller.view, attribute: .Trailing, multiplier: 1.0, constant: 0)        }        // Setting the new width constraint of the contentView        view.removeConstraint(contentViewConstraint)        contentViewConstraint = computedContentViewConstraint        // Adding all the constraints to the view hierarchy        view.addConstraint(contentViewConstraint)        contentView.addConstraints([bottomConstraint, topConstraint, trailingConstraint])        scrollView.addConstraints([widthConstraint])        controller.didMoveToParentViewController(self)        // Finally adding the controller in the list of controllers        controllers.append(controller)    }  }

I've used the lbrendanl's version in the past. Now I prefer this one. Let me know what you think of it.