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 looks like this

now what i want to implement is to show questions view controller while swiping up the users screen from bottom.

I am new to Ios, so help me in achieving this.

edit:

the problem is while swiping up only it should start showing the other view controller. if i swiped till middle of the screen with my finger still touching the screen, then it should show 2 view controllers.can I achieve this using push/pop like this

Answer 1

You can achieve this using Auto-layout and Swipe Gesture. Tricky part is setting constraints to your view. Add a negative of height constant constraint to your view so that it does not show in view.

@IBOutlet weak var yourViewBottomConstraint: NSLayoutConstraint! //Create IBOutlet of bottom Contraint to YourView

let swipeUp = UISwipeGestureRecognizer() // Swipe Up gesture recognizer
let swipeDown = UISwipeGestureRecognizer() // Swipe Down gesture recognizer OR You can use single Swipe Gesture

Than in your viewDidLoad()

Override func viewDidLoad() {
// Swipe Gesture
        swipeUp.direction = UISwipeGestureRecognizerDirection.up
        swipeUp.addTarget(self, action: "swipedViewUp")
        drawerButton.addGestureRecognizer(swipeUp) // Or assign to view

        swipeDown.direction = UISwipeGestureRecognizerDirection.down
        swipeDown.addTarget(self, action: "swipedViewDown")
        drawerButton.addGestureRecognizer(swipeDown) // Or assign to view
}

And methods to swipe view

 // Toggle Swipe Action for imagesContainer
func swipedViewUp(){

    self.yourViewBottomConstraint.constant = +90 // Or set whatever value

    print("Swiped Up")
}

func swipedViewDown(){

    self.yourViewBottomConstraint.constant = -90 // Or Set whatever value


    print("Swiped Down")
}