Cardlayout swipe left programmatically not working - ios

Question

I am using pod 'CardsLayout' to my project.
cardlayout library
The image is
this library doesn't have functionality of swipe left and swipe right programmatically. so, i checked that, it is using UICollectionView. So, i thought that i can use selectItem by following code.
func onNextButtonClicked(collectionViewCell:QuestionrieViewCell) {
let currentIndex = collectionViewCell.getIndexPath().row
if currentIndex < getIndexPaths().count-1{
collectionView.deselectItem(at: collectionViewCell.getIndexPath(), animated: true)
collectionView.selectItem(at: getIndexPaths()[collectionViewCell.getIndexPath().row + 1], animated: true, scrollPosition: .left)
self.collectionView(collectionView, didSelectItemAt:getIndexPaths()[collectionViewCell.getIndexPath().row + 1] )
}
}
func onPrevButtonClicked(collectionViewCell:QuestionrieViewCell) {
let currentIndex = collectionViewCell.getIndexPath().row
if currentIndex > 0{
collectionView.deselectItem(at: collectionViewCell.getIndexPath(), animated: true)
collectionView.selectItem(at: getIndexPaths()[collectionViewCell.getIndexPath().row - 1], animated: true, scrollPosition: .right)
self.collectionView(collectionView, didSelectItemAt:getIndexPaths()[collectionViewCell.getIndexPath().row - 1] )
}
}
I want that, swipe left and swipe right should be happen when the user click the buttons. here,
onPreviousButtonClicked working fine. whereas, swipe right button click not responding like i expected.
onNextBUttonClick gives weird response. response as below
it's stopped going to left and if i click the same right arrow button, on that stopped card, then it still slide little bit of the screen then stopped going to left.i don't know what should i do. Anyone can help me?
Edit
Additional images below.
ViewController Class is here
class ControllerQuestionarie: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate,QuestionrieViewCellDelegate{
var currentIndexPath:IndexPath?
var indexPaths:[IndexPath] = [IndexPath]()
var swipeToLeft:UISwipeGestureRecognizer?,swipeToRight:UISwipeGestureRecognizer?
var previousPage : Int = 0
#IBOutlet weak var linearProgressBar: LinearProgressBar!
#IBOutlet weak var lblQuestionNumber: UILabel!
func setIndexPaths(indexPath:IndexPath){
self.indexPaths.append(indexPath)
}
func getIndexPaths()->[IndexPath]{
return self.indexPaths
}
func onNextButtonClicked(collectionViewCell:QuestionrieViewCell) {
let currentIndex = collectionViewCell.getIndexPath().row
if currentIndex < getIndexPaths().count-1{
self.collectionView.selectItem(at: IndexPath(item: collectionViewCell.getIndexPath().row + 1, section: 0), animated: true, scrollPosition: .left)
self.collectionView(self.collectionView, didSelectItemAt: IndexPath(item: collectionViewCell.getIndexPath().row + 1, section: 0))
self.collectionView.layoutIfNeeded()
self.currentIndexPath = collectionViewCell.getIndexPath()
if self.currentIndexPath!.row == 4{
let controllerQuestionarieCompletionViewController = ControllerQuestionarieCompletionViewController.init(nibName: "ControllerQuestionarieCompletionViewController", bundle: nil)
self.navigationController!.pushViewController(controllerQuestionarieCompletionViewController, animated: true)
}
}
}
func onPrevButtonClicked(collectionViewCell:QuestionrieViewCell) {
let currentIndex = collectionViewCell.getIndexPath().row
if currentIndex > 0{
self.collectionView.selectItem(at: IndexPath(item: collectionViewCell.getIndexPath().row - 1, section: 0), animated: true, scrollPosition: .right)
self.collectionView(self.collectionView, didSelectItemAt: IndexPath(item: collectionViewCell.getIndexPath().row - 1, section: 0))
self.collectionView.layoutIfNeeded()
self.currentIndexPath = collectionViewCell.getIndexPath()
}
}
override func viewDidLoad() {
super.viewDidLoad()
collectionView.register(UINib.init(nibName: "QuestionrieViewCell", bundle: nil), forCellWithReuseIdentifier: "QuestionrieViewCell")
collectionView.collectionViewLayout = CardsCollectionViewLayout()
collectionView.dataSource = self
collectionView.delegate = self
collectionView.isPagingEnabled = true
collectionView.showsHorizontalScrollIndicator = false
let progressValue = 100/CGFloat(colors.count)
let progress = CGFloat(progressValue) * CGFloat(previousPage + 1)
lblQuestionNumber.text = "\(previousPage + 1) / \(colors.count)"
linearProgressBar.progressValue = progress
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.currentIndexPath = indexPath
// ... Other settings
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
let pageWidth = scrollView.frame.size.width
let page = Int(floor((scrollView.contentOffset.x - pageWidth / 2) / pageWidth) + 1)
print (page)
if previousPage != page{
let progressValue = 100/CGFloat(colors.count)
let progress = CGFloat(progressValue) * CGFloat(page + 1)
lblQuestionNumber.text = "\(page + 1) / \(colors.count)"
linearProgressBar.progressValue = progress
}
previousPage = page
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "QuestionrieViewCell", for: indexPath) as! QuestionrieViewCell
cell.questionrieViewCellDelegate = self
cell.layer.cornerRadius = 50.0
cell.setIndexPath(indexPath: indexPath)
setIndexPaths(indexPath: indexPath)
cell.bindData()
cell.view.backgroundColor = colors[indexPath.row]
return cell
}
#IBOutlet var collectionView: UICollectionView!
var colors: [UIColor] = [
UIColor(red: 255, green: 255, blue: 255),
UIColor(red: 249, green: 220, blue: 92),
UIColor(red: 194, green: 234, blue: 189),
UIColor(red: 1, green: 25, blue: 54),
UIColor(red: 255, green: 184, blue: 209)
]
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return colors.count
}
}
extension UIColor {
convenience init(red: Int, green: Int, blue: Int) {
self.init(red: CGFloat(red)/255 ,
green: CGFloat(green)/255,
blue: CGFloat(blue)/255,
alpha: 1.0)
}
}

Answer 1

Yes. I did it. Finally i have tasted the answer for this question.
public func moveToPage(position:Int){
let totalPage = collectionView.contentOffset.x/collectionView.frame.width// getting totalNumberOfPage
if position < Int(totalPage){
scrollToPage(page: position, animated: true)
}
}
public func moveToNextPage()->Int{
let pageIndex = round(collectionView.contentOffset.x/collectionView.frame.width)
let pageNo = Int(pageIndex+1)
scrollToPage(page: pageNo, animated: true)
return pageNo
}
public func moveToPreviousPage()->Int{
let pageIndex = round(collectionView.contentOffset.x/collectionView.frame.width)
let pageNo = Int(pageIndex-1)
scrollToPage(page: pageNo, animated: true)
return pageNo
}
func scrollToPage(page: Int, animated: Bool) {
var frame: CGRect = self.collectionView.frame
frame.origin.x = frame.size.width * CGFloat(page)
frame.origin.y = 0
self.collectionView.scrollRectToVisible(frame, animated: animated)
}
It works like charm. Thank you