swift : show another view controller on swipe up in first view controller

Question

Hi I checked many questions regarding swiping in SO but have doubts .

In my app I have two pages 1. user view controller 2. question view controller

user page l

Answer 1

First you'll have to add a UIPanGestureRecognizer to your "questions bar" so you can pan it to show the questions view.

To handle multiple view controllers, you can use a container view controller:

var pendingViewController: UIViewController? {
    didSet {
        if let pending = pendingViewController {
            addChildViewController(pending)
            pending.didMoveToParentViewController(self)

            pending.view.frame.origin.y = UIScreen.mainScreen().bounds.height

            view.addSubview(pending.view)
        }
    }
}

var currentViewController: UIViewController? { didSet { pendingViewController = nil } }

func showQuestions(recognizer: UIPanGestureRecognizer) {
    if recognizer.state == .Began {
        let controller = QuestionViewController() // create instance of your question view controller
        pendingViewController = controller
    }

    if recognizer.state == .Changed {
        let translation = recognizer.translationInView(view)

        // Insert code here to move whatever you want to move together with the question view controller view

        pendingViewController.view.center.y += translation.y
        recognizer.setTranslation(CGPointZero, inView: view)
    }

    if recognizer.state == .Ended {
        // Animate the view to it's location
    }
}

Something like this. This is all typed manually so there might be some mistakes.