I am trying to create horizontal slider like Flipkart. I am using collectionView with Horizontal scrolling and paging. Cell contains imageView. I am succeed in scrolling items horizontally manually, but I want all these items to move automatic and manually both. I am not getting how to scroll items of collectionView automatically. Please guide me to do this.
I have use this code in viewDidAppear:
let visibleIndexPath: NSIndexPath = self.collectionView.indexPathForCell(cell)!
self.collectionView.scrollToItemAtIndexPath(visibleIndexPath,
atScrollPosition: UICollectionViewScrollPosition.CenteredHorizontally, animated: true)
Thanks.
EDIT:
import UIKit
class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
@IBOutlet var pageControl: UIPageControl!
@IBOutlet var collectionView: UICollectionView!
var begin = false
let image1 = UIImage(named: "Slide 1")
let image2 = UIImage(named: "Slide 2")
let image3 = UIImage(named: "Slide 1")
var images = [UIImage]()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
images = [image1!, image2!, image3!]
startTimer()
}
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
pageControl.numberOfPages = images.count
return images.count
}
var cell : CollectionViewCell1!
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
cell = collectionView.dequeueReusableCellWithReuseIdentifier("CollectionViewCell1", forIndexPath: indexPath) as! CollectionViewCell1
cell.cell_image.image = images[indexPath.row]
return cell
}
/**
Scroll to Next Cell
*/
func scrollToNextCell(){
//get cell size
let cellSize = CGSizeMake(self.view.frame.width, self.view.frame.height);
//get current content Offset of the Collection view
let contentOffset = collectionView.contentOffset;
//scroll to next cell
if begin == true
{
pageControl.currentPage == 0
collectionView.scrollRectToVisible(CGRectZero, animated: true)
begin = false
}
else
{
collectionView.scrollRectToVisible(CGRectMake(contentOffset.x + cellSize.width, contentOffset.y, cellSize.width, cellSize.height), animated: true);
}
}
/**
Invokes Timer to start Automatic Animation with repeat enabled
*/
func startTimer() {
NSTimer.scheduledTimerWithTimeInterval(2.0, target: self, selector: #selector(ViewController.scrollToNextCell), userInfo: nil, repeats: true);
}
func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
// If the scroll animation ended, update the page control to reflect the current page we are on
pageControl.currentPage = Int((collectionView.contentOffset.x / collectionView.contentSize.width) * CGFloat(images.count))
if collectionView.contentSize.width == collectionView.contentOffset.x + self.view.frame.width
{
begin = true
}
}
func scrollViewDidEndScrollingAnimation(scrollView: UIScrollView) {
// Called when manually setting contentOffset
scrollViewDidEndDecelerating(scrollView)
}
}
This is my whole code.. I am not able to go to first cell after last cell. Please Help me.
