Jelly

Custom Viewcontroller animations with just a few lines of code

Jelly provides custom view controller transitions with just a few lines of code. No need to create your own PresentationController or Animator-Objects. A Jelly-Animator will do the heavy lifting for you.

Example 📱

You can use Jelly to build your own Alert-Views or Slidein-Menus using ViewControllers designed by yourself.

To run the example project, clone the repo, and run pod install from the Example directory first.

How to use 🔧

Jelly is super easy to use.

1. Create a JellyPresentation Object
2. Initialize a JellyAnimator using the JellyPresentation Object created in Step 1.
3. Call the prepare(viewController:UIViewController) Function
4. Finally call the native UIViewController presentation function.

override func viewDidLoad() {
    super.viewDidLoad()
    let viewController = self.storyboard.instantiateViewController(withIdentifier: "someViewController")
    let presentation = JellySlideInPresentation()
    self.jellyAnimator = JellyAnimator(presentation:presentation)
    self.jellyAnimator?.prepare(viewController: viewController)
    self.present(viewController, animated: true, completion: nil)
}

DO NOT FORGET TO KEEP A STRONG 💪 REFERENCE

Because the transitioningDelegate of a UIViewController is weak, you need to hold a strong reference to the JellyAnimator inside the UIViewController you are presenting from

class CustomVC : UIViewController {
    var jellyAnimator: JellyAnimator?
    override func viewDidLoad() {
        super.viewDidLoad()
        // Setup your Animator here 
        // ....
        // And assign it
        self.jellyAnimator = createAnimator()
    }
}

That's it. That's lit.

Customize 🖌

Jelly Supports two types of Presentations.

• JellySlideInPresentation
• JellyFadeInPresentation

Both share some propertys and each Property has a default value

• duration: JellyConstants.Duration (default: normal)
  • ultraSlow = 2.0
  • slow = 1.0
  • medium = 0.5
  • normal = 0.35
  • fast = 0.2
  • reallyFast = 0.1
• widthForViewController: JellyConstants.Size (default: fullscreen)
  • If the container is smaller than the provided width Jelly will automatically resize to the containers width
  • if Margin Guards are specified they also will be applied if width is to wide for the container
• heightForViewController: JellyConstants.Size (default: fullscreen)
  • If the container is smaller than the provided height Jelly will automatically resize to the containers width
  • if Margin Guards are specified they also will be applied when height is to high for the container
• horizontalAlignment: JellyConstants.HorizontalAlignment (default: .center)
  • center, left or right
• verticalAlignemt: JellyConstants.VerticalAlignment (default:center)
  • top, bottom, center
• marginGuards: default(UIEdgeInsets.zero)
  • If the width or height is bigger than the container we are working with, marginGuards will kick in and limit the size using the specified margins
• backgroundStyle: JellyConstants.BackgroundStyle (default: dimmed)
  • dimmed, blur(effectStyle), none
• cornerRadius: Double (default: 0)
• presentationCurve: JellyConstants.JellyCurve (default: linear)
  • easeIn, easeOut, easeInEaseOut, linear
• dismissCurve: JellyConstants.JellyCurve (default: linear)
  • easeIn, easeOut, easeInEaseOut, linear

JellySlideInAnimation provides 3 extra Properties

• directionShow: JellyConstants.Direction (default: top)
  • left, top, bottom, right
• directionDismiss: JellyConstants.Direction (default: top)
  • left, top, bottom, right
• jellyness: (default: none)
  • none (damping = 1.0, velocity = 0.0)
  • jelly (damping = 0.7, velocity = 2)
  • jellier (damping = 0.5 , velocity = 3)
  • jelliest (damping = 0.2, velocity = 4)

let customPresentation = JellySlideInPresentation(dismissCurve: .linear,
                                                    presentationCurve: .linear,
                                                         cornerRadius: 15,
                                                      backgroundStyle: .blur(effectStyle: .light),
                                                            jellyness: .jellier,
                                                             duration: .normal,
                                                        directionShow: .top,
                                                     directionDismiss: .top,
                                               widthForViewController: .fullscreen, 
                                              heightForViewController: .custom(value:200) ,
                                                  horizontalAlignment: .center,
                                                    verticalAlignment: .top,
                                                         marginGuards: UIEdgeInsets(top: 0, left: 10, bottom: 0, right: 10))


self.jellyAnimator = JellyAnimator(presentation:customPresentation)
self.jellyAnimator?.prepare(viewController: viewController)
self.present(viewController, animated: true, completion: nil)

Requirements

Your Project at least needs a deployment target that is > iOS 9.0

Installation

Jelly is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod "Jelly"

Mentions

• Mentioned in This Week in Swift by @Dave Verwer - Issue NO. 112
• Mentioned in iOS Dev Weekly by @Natasha the Robot - Issue No. 279

Author

Sebastian Boldt, [email protected]

License

Jelly is available under the MIT license. See the LICENSE file for more info.