如果我在uicollection视图的最后一页，如何转到下一个视图控制器。 其水平过渡和分页已启用

Question

@IBOutlet weak var collectionView: UICollectionView!

override func viewDidLoad() {
    super.viewDidLoad()
    self.collectionView.isPagingEnabled = true
}

@IBAction func onBackButtonTap(_ sender: Any) {
    //    if collection view is on first page i have to pop  
    // self.navigationController?.popViewController(animated: true)
    let collectionBounds = self.collectionView.bounds
    let contentOffset = CGFloat(floor(self.collectionView.contentOffset.x - collectionBounds.size.width))
    self.moveCollectionToFrame(contentOffset: contentOffset)

}

@IBAction func onNextButtonTap(_ sender: Any) {
    // if collection view is on last page i have to push to another view controller 
    let collectionBounds = self.collectionView.bounds
    let contentOffset = CGFloat(floor(self.collectionView.contentOffset.x + collectionBounds.size.width))
    self.moveCollectionToFrame(contentOffset: contentOffset)

}

func moveCollectionToFrame(contentOffset : CGFloat) {
    let frame: CGRect = CGRect(x : contentOffset ,y : self.collectionView.contentOffset.y ,width : self.collectionView.frame.width,height : self.collectionView.frame.height)
    self.collectionView.scrollRectToVisible(frame, animated: true)
}

How to go to next view controller if I am at last page of UICollectionView? Its horizontal transition and paging is enabled.

Answer 1

You can check for the current visible index and check if it is the last or first cell. And based on that you can take your action of pushing or popping the view controller

  var currentIndexPath:IndexPath = collectionView.indexPathsForVisibleItems.last!

        if currentIndexPath.row == yourArray.count - 1 {
            print("last row, we'll push")
        }

        if currentIndexPath.row == 0 {
            print("first row, we'll pop")
        }