Swift 3 Send image to CloudKit with CKAsset - ios

Question

N.B: This is not a repeat question, I have looked at the other solutions but none are working in Swift 3, but they do in Swift 2.
I need to get an image from a photo library with UIImagePickerController, that is working fine, then what I need to do, is to somehow save that to a public record in CloudKit, I am very open as to how this is done. Please, if possible, be clear as to what I need to change/add and where.
I have provided my entire view controller file just to be sure.
import UIKit
import CloudKit
var email: String = ""
class ViewController: UIViewController, UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
//MARK: Properties
#IBOutlet weak var firstNameField: UITextField!
#IBOutlet weak var lastNameField: UITextField!
#IBOutlet weak var emailField: UITextField!
#IBOutlet weak var passwordField: UITextField!
#IBOutlet weak var confirmPasswordField: UITextField!
#IBOutlet weak var notMatching: UILabel!
#IBOutlet weak var emailLabel: UILabel!
#IBOutlet weak var errorLabel: UILabel!
#IBOutlet weak var photoImageView: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
self.firstNameField.autocorrectionType = .no
self.lastNameField.autocorrectionType = .no
self.emailField.autocorrectionType = .no
self.passwordField.autocorrectionType = .no
self.confirmPasswordField.autocorrectionType = .no
self.notMatching.isHidden = true
firstNameField.delegate = self
lastNameField.delegate = self
emailField.delegate = self
passwordField.delegate = self
confirmPasswordField.delegate = self
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//MARK: UIImagePickerControllerDelegate
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
// Dismiss the picker if the user canceled.
dismiss(animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
// The info dictionary may contain multiple representations of the image. You want to use the original.
guard let selectedImage = info[UIImagePickerControllerOriginalImage] as? UIImage else {
fatalError("Expected a dictionary containing an image, but was provided the following: \(info)")
}
// Set photoImageView to display the selected image.
photoImageView.image = selectedImage
// Dismiss the picker.
dismiss(animated: true, completion: nil)
}
//MARK: Actions
#IBAction func selectImageFromPhotoLibrary(_ sender: UITapGestureRecognizer) {
//Hide keyboards
firstNameField.resignFirstResponder()
lastNameField.resignFirstResponder()
emailField.resignFirstResponder()
passwordField.resignFirstResponder()
confirmPasswordField.resignFirstResponder()
let imagePickerController = UIImagePickerController()
imagePickerController.sourceType = .photoLibrary
imagePickerController.delegate = self
present(imagePickerController, animated: true, completion: nil)
}
#IBAction func signUpPressed(_ sender: UIButton) {
let container = CKContainer.default()
let pubDB = container.publicCloudDatabase
//let privDB = container.privateCloudDatabase
//Check if users exist
let query = CKQuery(recordType: "MyUsers", predicate: NSPredicate(format: "TRUEPREDICATE", argumentArray: nil))
pubDB.perform(query, inZoneWith: nil, completionHandler: { (records, error) in
//error code 11 is no objects found
if error == nil || error?._code == 11 {
var emailExists = false
for record in records! {
if record.object(forKey: "email") as? String == self.emailField.text {
//other user with the same username exists - don't allow user to create account
emailExists = true
}
}
if emailExists == true {
self.emailLabel.text = "\(self.emailField.text!) is taken. Please choose another one."
} else {
if self.firstNameField.text != nil && self.lastNameField.text != nil && self.passwordField.text == self.confirmPasswordField.text {
//user can sign up
let record = CKRecord(recordType: "MyUsers")
record.setObject(self.emailField.text! as CKRecordValue?, forKey: "email")
record.setObject(self.passwordField.text! as CKRecordValue?, forKey: "password")
record.setObject(self.firstNameField.text! as CKRecordValue?, forKey: "firstName")
record.setObject(self.lastNameField.text! as CKRecordValue?, forKey: "lastName")
print("all good")
pubDB.save(record, completionHandler: { (record, error) in
if error == nil {
OperationQueue.main.addOperation {
UserDefaults.standard.set(self.emailField.text!, forKey: "Email")
email = self.emailField.text!
//self.performSegue(withIdentifier: "Games", sender: self)
}
} else {
print(error)
}
})
} else {
}
}
} else {
print(error)
}
})
}
// MARK: UITextFieldDelegate
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
// Hide the keyboard.
textField.resignFirstResponder()
return true
}
}
Thank you!

Answer 1

Here is a simple way to save an image as a CKAsset with CloudKit. Please make sure to change the name for your Record, and the field name for the asset from when you set up the record.
let documentsDirectoryPath:NSString = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString
var imageURL: URL!
let tempImageName = "Image2.jpg"
func saveImage(_ image: UIImage?) {
// Create a CKRecord
let newRecord:CKRecord = CKRecord(recordType: "<INSERT_RECORD_NAME")
if let image = image {
let imageData:Data = UIImageJPEGRepresentation(image, 1.0)!
let path:String = self.documentsDirectoryPath.appendingPathComponent(self.tempImageName)
try? UIImageJPEGRepresentation(image, 1.0)!.write(to: URL(fileURLWithPath: path), options: [.atomic])
self.imageURL = URL(fileURLWithPath: path)
try? imageData.write(to: self.imageURL, options: [.atomic])
let File:CKAsset? = CKAsset(fileURL: URL(fileURLWithPath: path))
newRecord.setObject(File, forKey: "<INSERT_RECORD_ASSET_FIELD_NAME")
}
if let database = self.publicDatabase {
database.save(newRecord, completionHandler: { (record:CKRecord?, error:Error?) in
// Check if there was an error
if error != nil {
NSLog((error?.localizedDescription)!)
}
else if let record = record {
// Do whatever you want with the record, but image record was saved, asset should be saved.
}
})
}
}
If you can't do JPEG format, and need to save as .png you can substitute the UIImageJPEGRepresentation section with this:
let imageData:Data = UIImagePNGRepresentation(image)!
try? UIImagePNGRepresentation(image)!.write(to: URL(fileURLWithPath: path), options: [.atomic])
And make the tempImageName something like let tempImageName = "Image2.png"
Hope this helps

Answer 2

Swift 5 version, but abstracted to a function where I can pass in a UI Image object and return the URL to be used. Useful where I had the image saved in CoreData and wanted to later upload to CloudKit as well.
func getImageURL(for image: UIImage?) -> URL {
let documentsDirectoryPath:NSString = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString
let tempImageName = "tempImage.jpg"
var imageURL: URL?
if let image = image {
let imageData:Data = image.jpegData(compressionQuality: 1.0)!
let path:String = documentsDirectoryPath.appendingPathComponent(tempImageName)
try? image.jpegData(compressionQuality: 1.0)!.write(to: URL(fileURLWithPath: path), options: [.atomic])
imageURL = URL(fileURLWithPath: path)
try? imageData.write(to: imageURL!, options: [.atomic])
}
return imageURL!
}
And then how I use it:
let imageURL = getImageURL(for: UIImage(data: itemToPublish!.Photo!)!)
let imageAsset = CKAsset(fileURL: imageURL)
itemBeingUpdated["photo"] = imageAsset
CKContainer.default().publicCloudDatabase.save(challengeRecord) { ...