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ioscachinguiimagensbundle

How can I access <Application_Home>/Library/Caches from a bundle?

My app downloads images from a server. I'd like to save those images to the Caches folder and then access them with UIImage(named:... for in-memory caching. Will UIImage(named: "fileURL", in: NSBundle.mainBundle, compatibleWith: nil) find the Caches folder or do I need to create a different bundle?

Solution

  • You don't want to use a bundle for caches folder. You should use NSFileManager to get the path for the caches folder. For example, in Swift 2:

    let fileURL = try! NSFileManager.defaultManager()
    .URLForDirectory(.CachesDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: false)
    .URLByAppendingPathComponent("test.jpg")

let image = UIImage(contentsOfFile: fileURL.path!)

    Or Swift 3:

    let fileURL = try! FileManager.default
    .url(for: .cachesDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
    .appendingPathComponent("test.jpg")

let image = UIImage(contentsOfFile: fileURL.path)