ios - How to properly send an image to CloudKit as CKAsset?

Question

I have an image (UIImage and it's url too) and I'm trying to send it to CloudKit as a CKAsset but I'm having this error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Non-file URL'. Here is the code:

override func viewDidLoad() {
        super.viewDidLoad()

        send2Cloud()
    }

func send2Cloud() {
    let newUser = CKRecord(recordType: "User")

    let url = NSURL(string: self.photoURL)

    let asset = CKAsset(fileURL: url!)

    newUser["name"] = self.name
    newUser["photo"] = asset

    let publicData = CKContainer.defaultContainer().publicCloudDatabase

    publicData.saveRecord(newUser, completionHandler: { (record: CKRecord?, error: NSError?) in

        if error == nil {

            dispatch_async(dispatch_get_main_queue(), { () -> Void in
                print("User saved")
            })

        } else {
            print(error?.localizedDescription)
        }
    })
}

I have the URL, I can print it, copy and paste to my navigator and it will show my image! So, I don't know what is happening here...

It would be easier if I worked with an UIImage instead of it's URL? Because, as I sais before, I have both of them! Any help is very appreciated! Thanks, guys!!

Answer 1

In my experience, the only way to save upload UIImage as a CKAsset is to:

1. Save the image temporarily to disk
2. Create the CKAsset
3. Delete the temporary file

---

let data = UIImagePNGRepresentation(myImage); // UIImage -> NSData, see also UIImageJPEGRepresentation
let url = NSURL(fileURLWithPath: NSTemporaryDirectory()).URLByAppendingPathComponent(NSUUID().UUIDString+".dat")
do {
    try data!.writeToURL(url, options: [])
} catch let e as NSError {
    print("Error! (e)");
    return
}
newUser["photo"] = CKAsset(fileURL: url)

// ...

publicData.saveRecord(newUser, completionHandler: { (record: CKRecord?, error: NSError?) in
    // Delete the temporary file
    do { try NSFileManager.defaultManager().removeItemAtURL(url) }
    catch let e { print("Error deleting temp file: (e)") }

    // ...
}

---

I filed a bug report a few months ago requesting the ability to initialize CKAsset from in-memory NSData, but it hasn't been done yet.