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See: https://www.invasivecode.com/weblog/advanced-cloudkit-i
01. To access the schema of the database, click on the button CloudKit Dashboard, or
go to https://icloud.developer.apple.com/dashboard. In the CloudKit dashboard, you
can manage the schema of the database, create new Record Types, and add, edit and delete records.
02. Select Record Types and then click on the + button to create a new record type.
Name the new record type WebServiceSettings. Then, add two fields of type string.
Call them serviceURL and serviceAPIKey. By default, when you create new fields,
indexes are added, to allow sorting, querying and searching on them. In this case,
we can uncheck all of them as we are only going to perform direct fetches of a record
based on its record name.
03. Now, select Default Zone, chose WebServiceSettings from the popup menu, and click on
the New Record button to add a new record. In the Record Name field, type a unique
identifier. We will use that identifier to fetch the record from the App. By default,
the dashboard gives you one like 99cae8ed-274e-4f56-87d2-83b27180c3fb, but you can use
any name record you want, as long as it is unique across this database. I am going to
use awesomeWebService for this example. Now, type a URL and an API key in the record
fields, and click on the Save button.
04. Let’s go back to Xcode. In the AppDelegate.swift, add this method and then call it when
your App launches:
func updateWebServiceSettings() {
let publicDatabase = CKContainer.defaultContainer().publicCloudDatabase
let recordID = CKRecordID(recordName: "awesomeWebService")
publicDatabase.fetchRecordWithID(recordID) { (record: CKRecord?, error: NSError?) -> Void in
guard error == nil else {
return
}
// Update the local copy of the settings
if let localRecord = record,
let urlString = localRecord["serviceURL"] as? String,
let apiKey = localRecord["serviceAPIKey"] as? String {
self.updateSettingsWithServiceURL(NSURL(string: urlString)!, serviceApiKey:apiKey )
}
}
}
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
updateWebServiceSettings()
return true
}
05. As you can see in the above source code, we are just getting a reference to the
public database. Then we create a recordId with the name of the record we are interested
in (remember that this id is unique). And finally, we tell the public database to perform
a fetch of that record. If the fetch succeeds, we get back an instance of the CKRecord
class with the values of its fields. At this point, you should update your local copy
of the data with the new values.
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