applikeysolutions/vegascroll

↕️ VegaScroll is a lightweight animation flowlayout for UICollectionView completely written in Swift 4, compatible with iOS 11 and Xcode 9.

vegascroll's Issues

Alpha issue for reusable some row

Getting alpha issue while displaying rows from dequeueReusableCell(..)

Rows are displaying with less alpha value(some transparent).

Update to new versions of Swift

This is a great such great project that deserves to be updated to new versions of swift

Typo

xCode -> Xcode

Perform strange when changing item width

iPad Pro, iOS 11.0

ScrollToItem(at:) programmatically - Can I control the speed of animation?

Hi, I would like use VegaScroll in user-disabled mode and call action on button press to scroll to the next index. It all works fine, only problem is, that the animation is too fast and it doesn't look that great.

I found only one way to control it in viewDidLoad method:
collectionView.decelerationRate = UIScrollViewDecelerationRateNormal

But that doesn't quite do the trick. Is there a way to control the speed of scroll animation directly in VegaScroll class?

Thank you

layout coming out nil

guard let layout = myCollectionView.collectionViewLayout as? VegaScrollFlowLayout else { return }

keep coming out nil, how can i solve this

UICollectionViewFlowLayout has cached frame mismatch for index path

I got this message when I added and ran a test project:

UICollectionViewFlowLayout has cached frame mismatch for index path <NSIndexPath: 0xc000000000000016> {length = 2, path = 0 - 0} - cached value: {{20, 10.083407407407407}, {374, 84}}; expected value: {{20, 10}, {374, 84}}
This is likely occurring because the flow layout subclass Coin.VegaScrollFlowLayout is modifying attributes returned by UICollectionViewFlowLayout without copying them.

Any idea how to fix this? The one solution I found didn't work:

override func finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? {
let attr = self.layoutAttributesForItemAtIndexPath(itemIndexPath)?.copy() as! UICollectionViewLayoutAttributes
// manipulate the attr
return attr
}

flatMap has been deprecated, update to compactMap

iPhone X Simulator layout bug

The cells oscillate wildly left/right/up/down on the XCode 9 (GM) iPhone X simulator with the example project (just whip the collection view up and down a couple of times).

I created a new project and it does the same thing for mine.

I would imagine this is a simulator bug, but wanted to make sure it was on your radar.

Great library, btw!

Less than six cell freezen and scrollToTop buggy.

Is it a maintaining project? I found out two places that is not good for user interface. One is the collection is not scrollable when cell number is less than six or seven. I hope it can be like bounce affect even if so. second one is when i touch the top of the screen. it goes back to top, but get a gap between first cell and large title, it looks a bit ugly. i hope it can be fixed. thx

Support for CollectionView with Section Header

Hi ,
I am facing a issue in which first collectionView item disappears while displayed section header in collectionView.
Flow layout gave two different issue,

1. While Scroll to downward: First Item after each section header disappears.
2. While Scroll to upward: Section header disappears.
   See Attachment for issue.
   

Swift Compiler Error

I tried adding the pod to my project, but I keep getting an Swift Compiler Error. More specific “Swift Compiler Error - Command failed due to signal: Segmentation fault: 11”. I get the error when I add this line of code to the project:
let layout = VegaScrollFlowLayout()
Layout is an error type and I don’t know how to fix it

Support for .horizontal scrollDirection

Will you be adding support for horizontal scroll direction?

Minimum build target is iOS 11 with Carthage

Hi, in the README, it says the minimum build target is iOS 9, but when I build the library with Carthage, it shows an error when importing it into a project with minimum build target as iOS 10.3, say gin that minimum build target for the framework is iOS 11.

Spring animation

Can we have (or is there?) an option to don't have the spring animation of the cells?

return dynamicAnimator.layoutAttributesForCell(at: indexPath)! - fatal error

Landscape Adjustment

If I want to use this on landscape view, specifically for iPad, where can I make the adjustment so that the cells stay centered?

Support animated data reloading

I'd love to be able to update the collectionView's data on the go. I found this code does the job:

let range = Range(uncheckedBounds: (0, collectionView.numberOfSections))
let indexSet = IndexSet(integersIn: range)
collectionView.reloadSections(indexSet)

However, running this, makes the app crash at line 112 because of an unexpected nil:

override open func layoutAttributesForItem(at indexPath: IndexPath) -> UICollectionViewLayoutAttributes? {
    return dynamicAnimator.layoutAttributesForCell(at: indexPath)!
}

I tried removing the ! to prevent the force-unwrapping of a nil variable, but that resulted in a generic terminating with uncaught exception of type NSException.

Any way we can update the data at runtime while viewing the collectionView?
I'm thinking of some cool animation: the cell that's to be removed scales down, then the cells below move up smoothly w/ a .easeOut curve. Would be awesome. Thanks!

Cells moving

When I scroll through the cells, they start doing a circular movement faster and faster after a few scrolls.
See it in video here : http:/tinypic.com/r/110wzso/9

Is it normal ? I was not able to reproduce this in the Example project.

Support flexible height according with constraints.

Add SPM Support

CocoaPods issue

Error during pod install

[!] No podspec found for VegaScrollFlowLayout in https://github.com/AppliKeySolutions/VegaScroll.git

I wonder if the new one will be better