I cloned the project in the attempt to include the stack effect for the vertical collection as in Shazam. I managed to do so except the fact that sometimes the stack displays two cards behind, sometimes three. Did you came across this problem when trying to implement this effect ? I think the problem is the third cell (which should be displayed in the background always when the indexPath is greater or equal to 2) sometimes gets deallocated, sometimes it doesn't. Do you have any guess on this ?

Thank you.

Checklist

• [x] I've tested my changes.
• [x] I've read the Contribution Guidelines.
• [x] I've updated the documentation if necessary.
• [x] I've added additional Tests where/if it makes sense.

Motivation and Context

Needed this feature for a own project an saw the help wanted on this feature in the issue tab

closes #40

tried it with different values from 1 to 10 cards on every possible device size

Description

removed this part to enable top stacking cards. if cvMinY > cardMinY + cardHeight + minimumLineSpacing + collectionView.contentInset.top { cvMinY = 0 }

• added bool to set if the stacking should be on top or at the bottom

• added int for the amout of cards shown in the background.

• defining an newRect so cards in the background won't be removed from the collectionView

let y = collectionView.bounds.minY - cellHeight * CGFloat(topStackCount) let newRect = CGRect(x: 0, y: y < 0 ? 0 : y, width: collectionView.bounds.maxX, height: collectionView.bounds.maxY) let items = NSArray(array: super.layoutAttributesForElements(in: newRect)!, copyItems: true)

i am very open for improvements because this is kind of a quick shot.

Hello, thanks for sharing this library. Exactly what I was looking for. I found one problem which I can't explain its behaviour and where is it coming from. I need to use the index of the visible cell to save it as a progress, so next time the user loads the collection view with the specific theme, it can scroll to index where it was left last time.

It's straight forward implementation, but the issue is, for whatever reason, the count always ignores index "3" and it goes like this: 1, 2, 2, 4, 5, .... even swiping backwards ...5, 4, 2, 2, 1

Home.swift:

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
        let visibleIndexPath = collectionView.indexPathsForVisibleItems
        let lastCardIndex = visibleIndexPath[0].row + 1
        print("visible index: \(lastCardIndex)")
    }

Where do I look within the code to tackle this?

Also, the very last card has an offset on Y axe. I couldn't figure out where to disable it. I'd like to animate the last card the same way and keep it in centre of the view as the other cards. The idea is to:

• display "Done" statement
• assign same BG colour as a view, so it looks it disappeared into it after the scroll animation finishes
• disable user interaction with bool

Thank you for your suggestions

Kind regards

A.

Is there a way to hide a previous card after scrolling up. I have tried to implement isPreviousCardVisible: Bool = false both in code and in IB, but previous card is always visible

Thanks!

I have problems adding the library to my podfile

• [x] I updated VerticalCardSwiper to the latest version.
• [x] I read the Contribution Guidelines.
• [x] I read the documentation.
• [x] I searched for existing GitHub issues.

Issue Description

I enter pod 'VerticalCardSwiper', '0.1.0-beta6' in my podfile and it gives me an error [!] Unable to find a specification for VerticalCardSwiper (= 0.1.0-beta6)

Environment

• iOS Version: [12.1]
• Device(s): [mac mini]
• Xcode Version: [10.1]

Bottom stacking won't work anymore with 2.3.0. I had to downgrade after wasting 3 hours not knowing what is going on. If someone else encounters this issue it is because of the new version. stackedCardsCount and isStackOnBottom have no effect whatsoever.

Now when I swipe 20-30% then card goes to left and right. But I want ratio of 5%. When I just swipe 5% then card should be goes to left and right. Where I need to change ?????

Hi, I have a AVPlayerLayer in CardCell, and when I check different approaches like if the AVPlayerLayer is visible, I get true even if the CardCell is not on top of stack, but behind another card (ex. ImageCardCell).

I would like to pause the video when CardCell goes back when scrolling, but I always get value true or a full height when I check in didEndScroll if the AVPlayerLayer is visible. Is there a way to check this?

I hope my question was clear.

Thanks for your help.

New Issue Checklist

• [x] I read the documentation.
• [x] I searched for existing GitHub issues.

Question

Is there a method for only scrolling down rather than allowing scrolling both ways? Disabling the last card just swiped to be visible again? Cheers

Is there a possibility to reverse the approach, like have a stack of cards and then either swipe left/right or just scroll card to bottom, and swipe up if you want to bring back the scrolled card?

I'm trying to animate the cardCell with a basic flip animation, with alpha change to show/hide the other view. This works perfectly with UICollectionView.

https://github.com/hemo87/ExampleAnimation

But the same code with this library just won't work, it refuses to do the alpha animation, as shown here.

https://github.com/hemo87/ExampleWithVeticalCardSwiper

Im assuming this is a bug as I'd expect it to still behave like UICollectionView?

Before opening the issue, have you...?

• [X] Searched Google for a solution to my issue if applicable.

Question

Is it possible to make the scrolling horizontal when calling scrollToCard?

New Issue Checklist

• [x] I read the documentation.
• [x ] I searched for existing GitHub issues.
• [x ] I searched Google for a solution to my issue if applicable.

Question

So the whole view will always have 2 cell, one is the current focused one and another is next one. I want to current one have the screen_width. The next one have screen_width-30. And once I scroll the next one, it become the current one and become the screen_width. Is there a way to fullfill this?

New Issue Checklist

• [x] I updated VerticalCardSwiper to the latest version.
• [x] I read the Contribution Guidelines.
• [x] I read the documentation.
• [x] I searched for existing GitHub issues.

Bug Description

Changing device orientation to landscape removes some cards from view

To Reproduce

Steps to reproduce the behavior:

1. Create more than one card for testing (eg 8), using normal methods.
2. Use numbers in sequential labelling visible on cards
3. Allow view to rotate to landscape orientation
4. Notice that only even numbered labels are visible

Expected behavior

Not expecting views to resize to landscape view (another issue, another day), but expecting to see all available cards in stack. Looking at card No 1 reverts to card No 2 when rotated to landscape. Looking at card No 3 reverts to No 6 when rotated.

Environment

• iOS Version: [13.7]
• Device(s): [iPhone X]
• Xcode Version: [11.7]

Bug Description

Card Swiper doesn't snap card swipe correctly when we provide different sizes for cards using

func sizeForItem(verticalCardSwiperView: VerticalCardSwiperView, index: Int)

To Reproduce

Steps to reproduce the behavior: Following steps are for ExampleViewController in project

1. Update contactsDataSource to add size for each item e.g.

private var contactsDemoData: [Contact] = [
        Contact(name: "John Doe", age: 33, size: 500),
        Contact(name: "Chuck Norris", age: 78, size: 500),
        Contact(name: "Bill Gates", age: 62, size: 500),
        Contact(name: "Steve Jobs", age: 56, size: 300),
        Contact(name: "Barack Obama", age: 56, size: 300),
        Contact(name: "Mila Kunis", age: 34, size: 300),
        Contact(name: "Pamela Anderson", age: 50, size: 300),
        Contact(name: "Christina Anguilera", age: 37, size: 300),
        Contact(name: "Ed Sheeran", age: 23, size: 300),
        Contact(name: "Jennifer Lopez", age: 45, size: 300),
        Contact(name: "Nicki Minaj", age: 31, size: 300),
        Contact(name: "Tim Cook", age: 57, size: 300),
        Contact(name: "Satya Nadella", age: 50, size: 300)
    ]

2. Add custom size for cells using delegate method

func sizeForItem(verticalCardSwiperView: VerticalCardSwiperView, index: Int) -> CGSize {
        let contact = contactsDemoData[index]
        return CGSize(width: self.view.bounds.size.width, height: CGFloat(contact.size))
}

3. Run project and notice, it takes size as expected, but swipe offset doesn't update based on cell size and snaps to wrong position on swipe up

Expected behavior

• Swipe offset should consider dynamic cell size and update position accordingly

Video

https://jmp.sh/KbBOXeR

Environment

iOS 13.6 - iPhone 11

Currently I am using this repo for show and play video player in Cell and video is automatically play. But problem is that when I am going to another tab video is still player on ExampleCell.I want to stop video player so how can I access cell outside CardForItemAt method and handle my issue ?

Thanks