image slider with show part of previous and next image - ios

Question

i have an a collection view and i use it as image slide show, but i need display in the left previous image and in the right display next image and in the middle current image
i need it same attached picture exactly:
this my code:
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return arr.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = myCollec.dequeueReusableCell(withReuseIdentifier: "ImageCollectionViewCell", for: indexPath) as! ImageCollectionViewCell
cell.img.image = UIImage(named: arr[indexPath.row])!
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: myCollec.frame.width, height: myCollec.frame.height)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAt section: Int) -> CGFloat {
0
}

Answer 1

In sizeForItemAt you are setting the item width to the collection view frame width.
Change that to a value that will make the cell's not full-frame-width.
Try starting with this:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: myCollec.frame.width - 80.0, height: myCollec.frame.height)
}