UIImage+Load.swift

UIImage+Load.swift

extension UIImage {

    static func load(_ imageURL: URL, maxSize: CGFloat) -> UIImage? {
        let imageSourceOptions = [kCGImageSourceShouldCache: false] as CFDictionary
        let maxDimensionInPixels: CGFloat = maxSize
        let downsampleOptions = [
            kCGImageSourceCreateThumbnailFromImageAlways: true,
            kCGImageSourceShouldCacheImmediately: true,
            kCGImageSourceCreateThumbnailWithTransform: true,
            kCGImageSourceThumbnailMaxPixelSize: maxDimensionInPixels] as [CFString : Any] as CFDictionary

        guard let imageSource = CGImageSourceCreateWithURL(imageURL as CFURL, imageSourceOptions), let downsampledImage =  CGImageSourceCreateThumbnailAtIndex(imageSource, 0, downsampleOptions) else {
            return nil
        }

        return UIImage(cgImage: downsampledImage)
    }
}