iosswiftuiviewuiviewanimationtransition

Swift - Present a UIView (not a ViewController)

I have two UIViewControllers and I would like to .present the gray UIView like you would usually present a ViewController (appearing bottom up and user can slide down to dismiss).

Screenshots for a better understanding:

enter image description here enter image description here

The bottomBar is a ContainerView and should not change by switching between the VC's, only the gray UIView which you can see in the 2nd picture.

I know I could just .present ViewControllerB without an animation and then just let the UIView appear from out of the screen. But if I do it like this the user is not able to drag down the UIView to dismiss it.

This is how I present ViewControllerB ("wishlistViewController) at the moment. 

let wishlistViewController = self.storyboard?.instantiateViewController(withIdentifier: "WishlistVC") as! WishlistViewController

        wishlistViewController.modalPresentationStyle = UIModalPresentationStyle.overCurrentContext

        self.navigationController?.present(wishlistViewController, animated: false)
}

Main Problem is that my UIView is not fullscreen. Otherwise I could just .present ViewControllerB. However, with my design the background image would be animated by .presenting or .dismissing as well and I do not want that.

There is probably a very easy solution for this but I couldn't find on presenting ONLY a UIView. Grateful for any tips :)

Solution

  • Well, there are two answers I can think of:

    1) If you want, you could just animate it in from the bottom using UIView.animate() on a y-position constraint it has, or on its layer's y-position attribute. You could then attach a UISwipeGestureRecognizer to it so that if you swipe down on it, it will animate back down.

    2) Make your views that you'd like to present viewControllers and have them be presented with a custom modal animation. This sounds like more work than you wanna do though. Here's a cool tutorial on youtube that walks you through how to create a custom animation transition between 2 view controllers: https://www.youtube.com/watch?v=B9sH_VxPPo4

    However, as far as I know, those .dismiss and .present methods are only meant for view controllers. Hopefully one of the two options I gave were helpful!