iOS Scrolling Parallax Effect in Table View Cell Swift 4 - ios

Question

I create Scrolling Parallax Effect in Table View Cell in my project but i have some freeze when i scrolling.
My code in custom Table View Cell :
class newsTableViewCell: UITableViewCell {
#IBOutlet weak var imageNews: UIImageView!
#IBOutlet weak var titleLable: UILabel!
#IBOutlet weak var imageHeight: NSLayoutConstraint!
#IBOutlet weak var imageTop: NSLayoutConstraint!
override func awakeFromNib() {
super.awakeFromNib()
imageNews.clipsToBounds = true
}
}
Code in my Main View Controller:
var paralaxOfSetSpeed: CGFloat = 70
var cellHeignt: CGFloat = 170
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell") as! newsTableViewCell
let good = data[indexPath.row]
cell.titleLable.text = (good["title"] as! String)
cell.imageHeight.constant = paralaxImageHeight
cell.imageTop.constant = paralaxOfSet(newOfSetY: tableView.contentOffset.y, cell: cell)
let newsImage = good["image"] as! PFFile
newsImage.getDataInBackground{ (imageData, error) in
if imageData != nil {
let image = UIImage(data: imageData!)
cell.imageNews.image = image
} else {
print(error ?? "getDataInBackground error")
}
}
return cell
}
func paralaxOfSet(newOfSetY: CGFloat, cell: UITableViewCell) -> CGFloat {
return (newOfSetY - cell.frame.origin.y) / paralaxImageHeight * paralaxOfSetSpeed
}
func scrollViewDidScroll(_ scrollView: UIScrollView) {
let ofSetY = tableView.contentOffset.y
for cell in tableView.visibleCells as! [newsTableViewCell] {
cell.imageTop.constant = paralaxOfSet(newOfSetY: tableView.contentOffset.y, cell: cell)
}
}
var paralaxImageHeight: CGFloat {
let maxOffSet = (sqrt(pow(cellHeignt, 2) + 4 * paralaxOfSetSpeed * self.tableView.frame.height ) - cellHeignt) / 1.5
return maxOffSet + self.cellHeignt
}
This is my code, main problem it's scrolling because it's a not smooth.
UPDATE:
So in the end, i want to get something like this:

Answer 1

I would suggest you to look into the below libraries:
They have implemented the parallax view in TableViewCell
https://github.com/marty-suzuki/SAParallaxViewControllerSwift
Hope it helps.