chunyeah/Chun

Web Image Cache in Swift

###Chun Web Image

---

This library provides UIImageView extensions with support for remote images coming from the web. Writen by Swift.

####Main Features

• async download = support for asynchronous downloads directly into the library
• backgr decompr = image decompression executed on a background queue/thread
• store decompr = images are stored in their decompressed version
• memory/disk cache = support for memory/disk cache
• UIImageView extensions = extensions for UIImageView directly into the library

Requirements

• iOS 7.0+ / Mac OS X 10.9+
• Xcode 6.3 & Swift 1.2

####Example

imageView.setImageWithURL(imageURL, placeholderImage: image)

Public APIs

extension UIImageView {

    /**
    Set the imageView image with image url.
    We will fetch and cache the image asynchronous.
    
    :param: url the local or remote url for the image
    */
    func setImageWithURL(url: NSURL)

    /**
    Set the imageView image with the image url
    Before the url image load, will display placeholderImage
    
    :param: url the local or remote url for the image
    :param: placeholderImage the image to be set initially
    */
    func setImageWithURL(url: NSURL, placeholderImage: UIImage?)
}

class Chun {

    /// Shared instance to manage the web image fetch and cache
    class var shared: Chun.Chun { get }

    /**
    Cancel and remove all fetch
    */
    func destroyAllFetch()

    /**
    Fetch image with local or remote url
    
    :param: url      the image url
    :param: complete callback when the fetch comlete
    */
    func fetchImageWithURL(url: NSURL, complete: (Chun.Result) -> Void)

    /**
    cancel fetch with image url
    
    :param: url the url witch waht to cancel
    */
    func cancelFetchWithURL(url: NSURL)

    /**
    Clear all cached image files in the disk
    */
    func clearDisk()

    /**
    Clear all cached images in the memory
    */
    func clearMemory()
}

enum Result {
    case Success(image: UIImage, fetchedImageURL: NSURL)
    case Error(error: NSError)
}

Authors and License

• All source code is licensed under the MIT License.
• Copyright (c) 2014-2015, @Chun Ye