How to configure the cache when using AFNetworking's setImageWithURL

afnetworking, caching, ios5, objective-c

Solution

The `UIImageView` category uses an internal, ephemeral cache for high performance in things like `UITableView`. For longer-term cache, use the system-level cacheing system--namely Peter Steinberger's fork of `SDURLCache`, a subclass of `NSURLCache`.

Set it up with the following code in the application delegate `applicationDidFinishLaunching:withOptions:`:

SDURLCache *URLCache = [[SDURLCache alloc] initWithMemoryCapacity:1024*1024*2 diskCapacity:1024*1024*20 diskPath:[SDURLCache defaultCachePath]];
[URLCache setIgnoreMemoryOnlyStoragePolicy:YES];
[NSURLCache setSharedURLCache:URLCache];
[URLCache release];

Problem

I'm using `setImageWithURL` to download some images in my app. Is it possible: - to specify how long this image must be held in cache (eg 1 week)? - to specify how big the the maximum total size of the cache (eg 200 MB) - to see what is in the image cache? - to clear the cache? The documentation is not really clear on these points..

Original source