Hi love your UPCarouselFlowLayout it's awesome library . by the way
is it RTL supported with your present library i need to use in RTL also, is there any way to do for RTL? i would like to appreciate if you assist me on the same... please help me.

Thanks in Advance

I noticed that it is supported by only iOS8.1+

What part of the code makes it not work with iOS 7?

I am customizing the frame size then the value of current page is getting wrong.

in case of iPad, continuous scrolling is not smooth it looks like my cell is vibrating, how to manage that ?
Thanks in Advance.

the cell on edge has a wrong scale

If you enable paging on the UICollectionView it does not scroll to a specific item and will instead end up between items.

I need to test more to confirm in a clean project.

Hi,

Thanks for your great repo.
When I run pod install I got the following error:

[!] Unable to satisfy the following requirements:

- `UPCarouselFlowLayout` required by `Podfile`

Any help?

kindly add Swift Package Manage.

Any way to change the color properties of unselected cells, as well as changing the size and alpha of the central cell?

Please update the project to Swift 5 version for stability.
Thanks

Hi !

I would like to know if you planned to create a swift 3-compatible version of your work ? Thanks :)

Thread 1: EXC_BAD_ACCESS (code=2, address=0x16ba93fe0)

override open func layoutAttributesForElements(in rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
guard let superAttributes = super.layoutAttributesForElements(in: rect),
let attributes = NSArray(array: superAttributes, copyItems: true) as? [UICollectionViewLayoutAttributes]
else { return nil }

    return attributes.map({ self.transformLayoutAttributes($0) })
}

hi, first of all, thanks for your work! the carousel is working nice for my app.

i want to connect the carousel with my pageView. My carousel just got a label with headings in it and when i swipe left or right i can change between different pageViews. Now i want to connect the heading-labels with my pages, like the pageViewController

so i want to swipe the headings "audio","netzwerk","player" together with the pageView
it looks like this

Hi, I want the cells to start at 3. How can I do that.

(Please delete, I created this ticket by accident, sorry.)

Hi, I'm facing the same problem specified in this issue:

#23

In his case, he's using another framework, but I want to keep using UPCarouselFlowLayout.

There is an easy way to get the current page?

Remove space between two cell.

Trying to configure it in Storyboard but it is giving me this error.
All three properties are not coding complaint.

[Storyboard] Unknown class _TtC14DayCare_Module20UPCarouselFlowLayout in Interface Builder file.

Failed to set (sideItemScale) user defined inspected property on (UICollectionViewLayout): [<UICollectionViewLayout 0x7fa9a8400480> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key sideItemScale.

Failed to set (sideItemAlpha) user defined inspected property on (UICollectionViewLayout): [<UICollectionViewLayout 0x7fa9a8400480> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key sideItemAlpha.

Failed to set (sideItemShift) user defined inspected property on (UICollectionViewLayout): [<UICollectionViewLayout 0x7fa9a8400480> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key sideItemShift.

I double checked everything but when I reach to end collection view cell and continue dragging it returns the first one and it causes index out of bound exception because page size is continuing increasing. I do not know how I enabled this feature but I need to understand how to close? Thanks anyone who can help.

SOLUTION
It is my mistake I specified 3 numberOfSections of collection view so that it is showing the beginning of list.

My cells are not centralizing and have no ideia why.

Do i need to do something special?

When device changes its orientation from orientation.isPortrait / orientation.isLandcape to orientation.isFlat there should not be any changes:

@objc private func rotationDidChange() {
if orientation.isFlat {
print("orientation.isFlat - Do not change anything")
return
}
let layout = self.collectionView.collectionViewLayout as! SIKUCarouselFlowLayout
let direction: UICollectionViewScrollDirection = orientation.isPortrait ? .horizontal : .vertical
layout.scrollDirection = direction
if currentPage > 0 {
let indexPath = IndexPath(item: currentPage, section: 0)
let scrollPosition: UICollectionViewScrollPosition = UIDeviceOrientationIsPortrait(orientation) ? .centeredHorizontally : .centeredVertically
self.collectionView.scrollToItem(at: indexPath, at: scrollPosition, animated: false)
}
}

i tried to use library like this but with no success, can you help me

Hi,

(Horizontal Scroll)
Is there a way you can change the y-axis position of only the items that are not in the center?

Thank You!

Hi !

First thanks for sharing your great work :)

I need to disable the sideScale transform on some part / view of my cell.
Do you see a way to do it ?

Cheers !

Hi,
When i rotate device to landscape mode always taking this warning?
Thanks.

The behavior of the UICollectionViewFlowLayout is not defined because:
2017-01-24 02:57:44.553 UPCarouselFlowLayoutDemo[32030:325685] the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.

Hi,
I am trying to achieve a pickerview in which instead of rotation transform by default I want scale down transform. The carousel seems perfect for this as it centers and pages with scaling, but if it could allow scaling upto 2 to 3 cells?

I want to start my collection view from the centre - the initial cell will be in the centre user can swipe left or right - the transformation not working.

Hi.
I want to get center index in this collection view at default mode or after scroll.
How to get it?

Layout attribute works not fine.

When u scroll next - everything alright.

Hi

I put the UPCarousel inside a view that is in a Container view.

Normally I can run the project but I can't select the current page.

What can I do to select specific page ?
self.currentPage = 3 doesn't work.

If you want I can send you a sample project that I tried.

I have few cells in my collection view, now I deleted the first cell or last cell. After deleting I'm reloading the collection view, here the next cell or previous cell (first or last based on deletion) was not horizontally centered aligned. If user scroll the content then only the cell alignment is adjusting. I tried to move programatically by using setContentOffset, scrollToItem, scrollToRect but none of them worked. First and second screenshots were related to the issue after collection view reload due to deletion of first and last record respectively. The last/third screenshot belongs to expected layout, which got if user swipes on the screen

After reload when first item deleted:

After reload when last item deleted:

After user move the screen:

Hello!
If you embed ViewController in NavigationViewController in Example you get following errors on iPhone 5S 10.2:

2018-01-17 21:52:56.026 UPCarouselFlowLayoutDemo[63712:5963793] The behavior of the UICollectionViewFlowLayout is not defined because:
2018-01-17 21:52:56.026 UPCarouselFlowLayoutDemo[63712:5963793] the item height must be less than the height of the UICollectionView minus the section insets top and bottom values, minus the content insets top and bottom values.
2018-01-17 21:52:56.026 UPCarouselFlowLayoutDemo[63712:5963793] The relevant UICollectionViewFlowLayout instance is <UPCarouselFlowLayoutDemo.UPCarouselFlowLayout: 0x7fb1a5609850>, and it is attached to <UICollectionView: 0x7fb1a680e000; frame = (0 64; 320 277); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x61000004bfd0>; layer = <CALayer: 0x610000037ac0>; contentOffset: {0, -64}; contentSize: {0, 336}> collection view layout: <UPCarouselFlowLayoutDemo.UPCarouselFlowLayout: 0x7fb1a5609850>.
2018-01-17 21:52:56.027 UPCarouselFlowLayoutDemo[63712:5963793] Make a symbolic breakpoint at UICollectionViewFlowLayoutBreakForInvalidSizes to catch this in the debugger.

How can I solve the alignment problem when cells are smaller than half of the screen and I want to see the first or last cell?

See attached GIF:

Thanks for suggestions.

Hi,

**

Glitch - programmatically approach

**
Can you help me to resolve this problem? When the numberOfItemsInSection exceeded in 4 the Glitch was happening. Kindly see my attached picture that show the Glitch.

Here's my code:

and Project Navigation :

Just noticed that scrollToItemAtIndexPath:atScrollPosition:animated: of the UIScrollView is not working properly when using this layout.

I tried with all the UICollectionViewScrollPosition options, even though the CenteredVertically and CenteredHorizontally should probably be the only supported ones, depending on the layout direction.

I would be glad to add support for it and send a pull request if somebody can provide some basic direction to get me started.

Hello guys,

I'm searching a way to make appear some information when the item is in the center, and make it's disappear when it's not.

Is it possible with UPCarouselFlowLayout?
Or Do you have any idea where I can make a callback to get the state of an item?

regards,

Hello,

Do this framework has swift 4 support, if not when can we get the updated library.

Rotating device from portrait to landscape sets contentOffset to zero and shows first item as selected while the actual item is the other item.

hi
i tried to copy all code in my project
all codes all same but just the cell is little different
when i run the app
the collection view is completely black.

As of now, user must tap a cell in order to trigger didSelectItemAtIndexPath. Is there a way to select the center cell once the scrolling ended automatically?

I was wondering if there was some way to make the control operate like this:

https://github.com/awdigital/AWCollectionViewDialLayout

As my issue title suggests, I'm curious how I can reset the position of the carousel when the .reloadData() function is called on the associated UICollectionView. I'd like it to reset to the first item in the collection.

Thanks!

• Expected Behavior: For a normal paging UICollectionView using a standard flow layout, you can swipe the cell quickly and let go (before it reaches the threshold to show the next view) and it will gently bounce back.
• Actual Behavior: For this layout, it seems to bounce back instantaneously without any animation. (If you drag gently and let go, it will bounce back gently... if you flick it quickly and let go quickly, it will be instantaneous).

Have you come across this before?

I tested both on device and simulator and see it both places. I also tested with different deceleration rates and it doesn't seem to change anything

I'm using a vanilla UICollectionView w/ vertical scrolling and this as the layout:

final class SwipeableLessonLayout: UPCarouselFlowLayout {
    
    // MARK: - Instantiation
    
    override init() {
        super.init()
        
        itemSize = CGSize(width: UIScreen.main.bounds.size.width, height: LessonSectionCell.cellHeight)
        scrollDirection = .vertical
        minimumLineSpacing = 0
        minimumInteritemSpacing = 0
        
        sideItemScale = 1
        sideItemAlpha = 0.4
        spacingMode = UPCarouselFlowLayoutSpacingMode.fixed(spacing: 0)
    }
    
    // MARK: - Unsupported Initializers
    
    required init?(coder aDecoder: NSCoder) { fatalError("init(coder:) has not been implemented") }

}

scroll not smooth while scroll small space and release your hand quickly