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 \

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.