uiimageview animation stops when user touches screen - ios

Question

I have a UImageview with animated image.
i am adding the uiimageview in code and its a part of a CollectionViewCell
When the user touches the cell the animation stops, why does this happen?
code:
var images: [UIImage] = []
for i in 0...10 {
images.append(UIImage(named: "image\(i)"))
}
let i = UIImageView(frame: CGRect(x: xPos, y: yPos, width: 200, height: 200))
i.animationImages = images
i.animationDuration = 0.5
i.startAnimating()
i.contentMode = UIViewContentMode.Center
i.userInteractionEnabled = false
self.addSubview(i)

Answer 1

If you don't want any interaction then following will be the fastest way to resolve this issue:
collectionView.allowsSelection = false

Answer 2

In your custom collection view cell class, write following methods to fix issue
func setSelected(selected:Bool) {
}
func setHighlighted(higlighted:Bool) {
}

Answer 3

Swift 4.0 Version:
override open var isSelected: Bool
{
set {
}
get {
return super.isSelected
}
}
override open var isHighlighted: Bool
{
set {
}
get {
return super.isHighlighted
}
}

Answer 4

Overriding isSelected, isHighlighted with empty setter will solve this issue, but it will lose those two properties to be set. I was able to solve this issue by calling imageView.startAnimating() at didSelectItemAt in UICollectionViewDelegate.
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let item = items[indexPath.item]
if item.hasGIF {
let cell = collectionView.cellForItem(at: indexPath) as! ItemCell
cell.imageView.startAnimating()
}
}
func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
let item = items[indexPath.item]
if item.hasGIF {
let cell = collectionView.cellForItem(at: indexPath) as! ItemCell
cell.imageView.startAnimating()
}
}

Answer 5

In my case, I can't disable selection or use any of the solutions posted before here. I do not need to highlight the cell so I disabled it through the delegate method below to return false which prevented the stopAnimating() method from being called. This was an issue I encountered when using the AnimatedImageView of KingFisher used in a UICollectionViewCell.
func collectionView(_ collectionView: UICollectionView, shouldHighlightItemAt indexPath: IndexPath) -> Bool {
return false
}
An array of UIImage objects to use for an animation. var highlightedAnimationImages: [UIImage]? An array of UIImage objects to use for an animation when the view is highlighted. The amount of time it takes to go through one cycle of the images.

Answer 6

I created a custom UIImageView class and only stopped animation if I want it to stop.
class GifImageView: UIImageView {
private var stop = false
static func getAudioGif(_ size: CGFloat) -> GifImageView {
return fromGif(frame: CGRect(x: 0, y: 0, width: size, height: size), resourceName: "audio")!
}
override func stopAnimating() {
if stop {
stop = false
super.stopAnimating()
}
}
func stopForReal() {
stop = true
stopAnimating()
}
func fromGif(frame: CGRect, resourceName: String) -> GifImageView? {
guard let path = Bundle.main.path(forResource: resourceName, ofType: "gif") else {
print("Gif does not exist at that path")
return nil
}
let url = URL(fileURLWithPath: path)
guard let gifData = try? Data(contentsOf: url),
let source = CGImageSourceCreateWithData(gifData as CFData, nil) else { return nil }
var images = [UIImage]()
let imageCount = CGImageSourceGetCount(source)
for i in 0 ..< imageCount {
if let image = CGImageSourceCreateImageAtIndex(source, i, nil) {
images.append(UIImage(cgImage: image))
}
}
let gifImageView = GifImageView(frame: CGRect(x: 0, y: 0, width: frame.width, height: frame.height))
gifImageView.animationImages = images
return gifImageView
}
}

Answer 7

In TableView Use code below can solve touche cancel, touche moved and so on
- (void)tableView:(UITableView *)tableView didUnhighlightRowAtIndexPath:(NSIndexPath *)indexPath {
[cell startAnimation];
}