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https://github.com/JoniVR/VerticalCardSwiper

A marriage between the Shazam Discover UI and Tinder, built with UICollectionView in Swift.
https://github.com/JoniVR/VerticalCardSwiper

animation cards collectionview discover help-wanted ios shazam shazam-discover-ui swift swipe tinder tinder-style tinder-ui uicollectionview uikit

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A marriage between the Shazam Discover UI and Tinder, built with UICollectionView in Swift.

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README 

        
 VerticalCardSwiper 





    A marriage between the Shazam Discover UI and Tinder, built with UICollectionView in Swift.










    

    

        build status

    

    

    

        cocoapods version

    

    

    

        Carthage compatible

    

    

    

        GitHub

    

    

    

        platform

    

    

        swift5.0

    







  



  example




## Project goal and information

The goal of this project is to recreate the Discover UI in Shazam (which I think is a great, fun way to display content) in combination with a Tinder style of swiping cards to the left/right.

The idea behind this is that in some cases, you don't want to swipe away cards, but keep them available for later on. This implementation allows for that. And it's a fun way to interact with content.



It's built with a `UICollectionView` and a custom flowLayout.



## Requirements

* iOS 9.0+

* Swift 5



## Installation



### CocoaPods

To install with [CocoaPods](https://cocoapods.org), simply add the following line to your Podfile:

```ruby

pod 'VerticalCardSwiper'

```



### Carthage

To install with [Carthage](https://github.com/Carthage/Carthage), simply add the following line to your Podfile:

```ruby

github "JoniVR/VerticalCardSwiper"

```



## Example

To try out `VerticalCardSwiper`



```ruby

pod try VerticalCardSwiper

```



or open the project and run the Example.



## Usage

`VerticalCardSwiper` behaves a lot like a standard `UICollectionView`. 

To use it inside your `UIViewController`:



```swift

import VerticalCardSwiper



class ExampleViewController: UIViewController, VerticalCardSwiperDatasource {

    

    private var cardSwiper: VerticalCardSwiper!

    

    override func viewDidLoad() {

        super.viewDidLoad()

        

        cardSwiper = VerticalCardSwiper(frame: self.view.bounds)

        view.addSubview(cardSwiper)

        

        cardSwiper.datasource = self

        

        // register cardcell for storyboard use

        cardSwiper.register(nib: UINib(nibName: "ExampleCell", bundle: nil), forCellWithReuseIdentifier: "ExampleCell")

    }

    

    func cardForItemAt(verticalCardSwiperView: VerticalCardSwiperView, cardForItemAt index: Int) -> CardCell {

        

        if let cardCell = verticalCardSwiperView.dequeueReusableCell(withReuseIdentifier: "ExampleCell", for: index) as? ExampleCardCell {

            return cardCell

        }

        return CardCell()

    }

    

    func numberOfCards(verticalCardSwiperView: VerticalCardSwiperView) -> Int {

        return 100

    }

}

```



#### Properties

```swift

/// Indicates if side swiping on cards is enabled. Set to false if you don't want side swiping. Default is `true`.

@IBInspectable public var isSideSwipingEnabled: Bool = true

/// Allows you to enable/disable the stacking effect. Default is `true` (enabled).

@IBInspectable public var isStackingEnabled: Bool = true

/// The transform animation that is shown on the top card when scrolling through the cards. Default is 0.05.

@IBInspectable public var firstItemTransform: CGFloat = 0.05

/// The inset (spacing) at the top for the cards. Default is 40.

@IBInspectable public var topInset: CGFloat = 40

/// The inset (spacing) at each side of the cards. Default is 20.

@IBInspectable public var sideInset: CGFloat = 20

/// Sets how much of the next card should be visible. Default is 50.

@IBInspectable public var visibleNextCardHeight: CGFloat = 50

/// Vertical spacing between the focussed card and the bottom (next) card. Default is 40.

@IBInspectable public var cardSpacing: CGFloat = 40

/// Allows you to set the view to Stack at the Top or at the Bottom. Default is true.

@IBInspectable public var isStackOnBottom: Bool = true

/// Sets how many cards of the stack are visible in the background

@IBInspectable public var stackedCardsCount: Int = 1

/** 

 Returns an array of indexes (as Int) that are currently visible in the `VerticalCardSwiperView`.

 This includes cards that are stacked (behind the focussed card).

*/

public var indexesForVisibleCards: [Int]

```



#### Other

##### Just like with a regular `UICollectionView`, you can reload the data by calling

```swift

cardSwiper.reloadData()

```



##### Get the current focussed card index

```swift

cardSwiper.focussedCardIndex

```



##### Scroll to a specifc card by calling

```swift

cardSwiper.scrollToCard(at: Int, animated: Bool) -> Bool

```



##### Get a card at a specified index

```swift

cardSwiper.cardForItem(at: Int) -> CardCell?

```



##### Swipe a card away programatically

```swift

cardSwiper.swipeCardAwayProgrammatically(at: Int, to: SwipeDirection, withDuration: TimeInterval = 0.3) -> Bool

```



##### Moving/Deleting/Inserting cards at runtime

Make sure to update your datasource first, otherwise an error will occur.

```swift

cardSwiper.moveCard(at: Int, to: Int)

cardSwiper.deleteCards(at: [Int])

cardSwiper.insertCards(at: [Int])

```



### Delegation

To handle swipe gestures, implement the `VerticalCardSwiperDelegate`.



```swift

class ViewController: UIViewController, VerticalCardSwiperDelegate {



    override func viewDidLoad() {

        super.viewDidLoad()



        cardSwiper.delegate = self

    }

    

    func willSwipeCardAway(card: CardCell, index: Int, swipeDirection: SwipeDirection) {

    

        // called right before the card animates off the screen (optional).

    }



    func didSwipeCardAway(card: CardCell, index: Int, swipeDirection: SwipeDirection) {



        // handle swipe gestures (optional).

    }

    

    func didCancelSwipe(card: CardCell, index: Int) {

        

        // Called when a card swipe is cancelled (when the threshold wasn't reached)

    }

    

    func sizeForItem(verticalCardSwiperView: VerticalCardSwiperView, index: Int) -> CGSize {

    

        // Allows you to return custom card sizes (optional).

        return CGSize(width: verticalCardSwiperView.frame.width * 0.75, height: verticalCardSwiperView.frame.height * 0.75)

    }

    

    func didScroll(verticalCardSwiperView: VerticalCardSwiperView) {

    

        // Tells the delegate when the user scrolls through the cards (optional).

    }

    

    func didEndScroll(verticalCardSwiperView: VerticalCardSwiperView) {

    

        // Tells the delegate when scrolling through the cards came to an end (optional).

    }

    

    func didDragCard(card: CardCell, index: Int, swipeDirection: SwipeDirection) {

    

        // Called when the user starts dragging a card to the side (optional).

    }

    

    func didTapCard(verticalCardSwiperView: VerticalCardSwiperView, index: Int) {

    

        // Tells the delegate when the user taps a card (optional).

    }

    

    func didHoldCard(verticalCardSwiperView: VerticalCardSwiperView, index: Int, state: UIGestureRecognizer.State) {

    

        // Tells the delegate when the user holds a card (optional).

    }

}

```



### Customization

Subclass the `CardCell` to customize the cards.

```swift

class ExampleCardCell: CardCell {



}

```



## Key Features

- [x] Shazam Discover UI with paging

- [x] Tinder-style swiping

- [x] Option to disable side swiping

- [x] Set custom number of stacked cards

- [x] Code documentation in README.md file

- [x] Cocoapods support

- [x] Carthage support

- [x] SPM support

- [ ] Diff support



## Author

Joni Van Roost, [email protected]



## License

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



## More

Feel free to submit a pull request, open an issue or fork this project. Any help is always appreciated.

A big thank you to all the [contributors](https://github.com/JoniVR/VerticalCardSwiper/graphs/contributors)!