Sonic Master Sonic Master -4 years ago 430
iOS Question

Resize Download Image with AlamofireImage

I have 200px x 200px

UIImageView
on
UICollectionViewCell
that will display an image from URL. The problem is I don't know what resolution's image provided by the URL and I think it's better to resize it first before placing in
UIImageView
due to memory consumption.

I already use alamofire to download an image

let url = NSURL(string: "http:\(product.picUrl)")
self.imgProductItem.af_setImageWithURL(url!, placeholderImage: UIImage(named: "app_default-resize"))


I am wondering is there any method to resize it first before it use to place in
UIImageView
? And if any tips for download an image to save memory usage, I'd like to hear that.

Any help would be appreciated. Thank you.

Answer Source

You can use filters:

let url = NSURL(string: ...)!
let placeholder = UIImage(named: "app_default-resize")

let filter = AspectScaledToFillSizeFilter(size: imageView.frame.size)
imageView.af_setImageWithURL(url, placeholderImage: placeholder, filter: filter)

See https://github.com/Alamofire/AlamofireImage#image-filters-1.

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