In this recipe, we will learn how to save and retrieve small amounts of data that are suitable for storing app settings or anything that would be useful to be shared among different devices.
Note
Apps can only store up to a total of 1 MB of data with key/value store, in up to 1024 keys. So it cannot be used to back up files or similar functionality.
We will need two devices under the same iCloud account to actually see iCloud storage in action. On one device we will save some data, and on the second device we will load the data. If only one device is available, it is not an issue as it will work flawlessly because the data will just be loaded from local storage, instead of iCloud.