insidegui

let predicate = NSPredicate(value: true)
let query = CKQuery(recordType: "Movie", predicate: predicate)
let operation = CKQueryOperation(query: query)

insidegui

NotificationCenter.default.addObserver(self, 
                                       selector: #selector(startDiscoveryProcess), 
                                       name: Notification.Name.CKAccountChanged, 
                                       object: nil)

insidegui

private func updateUserRecord(_ userRecord: CKRecord, with avatarURL: URL) {
    userRecord["avatar"] = CKAsset(fileURL: avatarURL)

    CKContainer.default().publicCloudDatabase.save(userRecord) { _, error in
        guard error == nil else {
            // top-notch error handling
            return
        }

        print("Successfully updated user record with new avatar")

insidegui

CKContainer.default().requestApplicationPermission(.userDiscoverability) { status, error in
    guard status == .granted, error == nil else {
        // error handling voodoo
        return
    }

    CKContainer.default().discoverUserIdentity(withUserRecordID: recordID) { identity, error in
        guard let components = identity?.nameComponents, error == nil else {
            // more error handling magic
            return

insidegui

CKContainer().default().discoverAllIdentities { identities, error in
    guard let identities = identities, error == nil else {
        // awesome error handling
        return
    }

    print("User has \(identities.count) contact(s) using the app:")
    print("\(identities)")
}

insidegui

// `recordID` is the record ID returned from CKContainer.fetchUserRecordID
CKContainer.default().publicCloudDatabase.fetch(withRecordID: recordID) { record, error in
    guard let record = record, error == nil else {
        // show off your error handling skills
        return
    }

    print("The user record is: \(record)")
}

insidegui

CKContainer.default().fetchUserRecordID { recordID, error in
    guard let recordID = recordID, error == nil else {
        // error handling magic
        return
    }
    
    print("Got user record ID \(recordID.recordName).")
}

insidegui

container.privateCloudDatabase.fetchAllRecordZones { zones, error in
    guard let zones = zones, error == nil else {
        // error handling magic
        return
    }
    
    print("I have these zones: \(zones)")
}

insidegui

@IBAction func titleFieldAction(_ sender: Any) {
    guard let title = titleField.text else { return }
    
    record["title"] = title as CKRecordValue
}

insidegui

enum MovieKey: String {
    case title
    case releaseDate
    case location
    case rating
}