Images are swapped in CollectionViewCell about kingfisher HOT 8 CLOSED

There should be no concern for it. Kingfisher will remember the last set image url and ignore previous image loading, even if it is not yet finished.

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Your code seems good to me except reseting the image once again when downloading successfully. The kf_setImageWithURL will set the image for you when everything goes OK.

May I know some more detail and context on how do you configure your cell? And you could check and the demo project in the repo as well, in which a collection view is used to show some images.

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Thanks, you gave me a hint. The issue was the resetting. I guess my function did not maintain the imageView's references since it is a reused cell from collection view.

Here is a revised code:

imageView.kf_setImageWithURL(thumbnailUrl,
    placeholderImage: UIImage(named: "loading_image"),
    optionsInfo: nil,
    completionHandler: { [weak imageView] (image, error, cacheType, imageURL) -> () in
        if error != nil {
            imageView?.image = UIImage(named: "no_image")
        }
})

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:)

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@onevcat
imageView.kf_setImageWithURL(thumbnailUrl,
placeholderImage: UIImage(named: "loading_image"),
optionsInfo: nil,
completionHandler: { [weak imageView] (image, error, cacheType, imageURL) -> () in
if error != nil {
imageView?.image = UIImage(named: "no_image")
}
// for fast scrolling when the cell is reused and you might have 2 request for same cell on queue .should we also check if previous url is same as current one. To avoid showing wrong image on the cell till the correct one invokes and reloads the cell or is this handled. In the demo this is not handled.
Note I am using prepareForReuse() to set imageview.image = nil // does this take care of it.
Just curious before I put KF code in all over my project.
something like
if thumbnailUrl != imageURL{ // a completion for previous cell
imageView?.image = nil
}
})

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Here what is the name of the image "no_image" means which is downloaded from the server image or your placeholder image.
?????

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And also i am getting error "Value of type 'UIImage?' has no member 'kf_setImageWithURL'" what the extension for the method.?
Please help me.

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@HariNarayanan777 UIImage(named: "no_image") is local image. When an error occurs fetching the image from the url, I will replace the placeholder image ("loading_image") to "no_image" image.

And kf_setImageWithURL is an old API and also Kingfisher's API is on UIImageView. Not on UIImage.

I think you can try

imageView.kf.setImage(
    with: imageUrl,
    placeholder: UIImage(named:"some_placeholder_image"),
    options: nil,
    progressBlock: nil,
    completionHandler: { (image: Image?, error: NSError?, cache: CacheType, url: URL?) in
})

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