How to Focus last cell of visible cell of collection view? - objective-c

Question

I want to focus and change the frame of last cell of visible cell of collectionView.
I want collection view behaviour like this.
I found the library that change the first cell of collection view but I want to change the frame of last cell. This library using flow layout.
override func prepareLayout() {
cache.removeAll(keepCapacity: false)
let standardHeight = UltravisualLayoutConstants.Cell.standardHeight
let featuredHeight = UltravisualLayoutConstants.Cell.featuredHeight
var frame = CGRectZero
var y: CGFloat = 0
for item in 0..<numberOfItems {
// 1
let indexPath = NSIndexPath(forItem: item, inSection: 0)
let attributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
// 2
attributes.zIndex = item
var height = standardHeight
// 3
if indexPath.item == featuredItemIndex
{
// 4
let yOffset = standardHeight * nextItemPercentageOffset
y = collectionView!.contentOffset.y - yOffset
height = featuredHeight
} else if indexPath.item == (featuredItemIndex + 1) && indexPath.item != numberOfItems {
// 5
let maxY = y + standardHeight
height = standardHeight + max((featuredHeight - standardHeight) * nextItemPercentageOffset, 0)
y = maxY - height
}
// 6
frame = CGRect(x: 0, y: y, width: width, height: height)
//print("Item : \(item) : \(frame)");
attributes.frame = frame
cache.append(attributes)
y = CGRectGetMaxY(frame)
}
}
library uses above function to change the frame of all elements.
Can any one tell me that how can I achieve this.

Answer 1

You can use visible cells of a UICollectionView to get the array of visible cells and focus on the lastObject of the array