Can my app let users save some files to iCloud and rest on device

Question

In Apple's Document Based App Development Guide, it emphasizes that our app should let users choose either to save all their files to iCloud or save all on local device. Is there reason for this? Can we actually allow users to pick some files to be saved on iCloud and some to be saved locally, like the TextEdit app on mac OS X? Will App Store disapprove iOS apps configured in this way if it is programmatically possible?

Thanks!

Answer 1

Here is a link

https://developer.apple.com/library/ios/documentation/DataManagement/Conceptual/DocumentBasedAppPGiOS/ManageDocumentLifeCycle/ManageDocumentLifeCycle.html#//apple_ref/doc/uid/TP40011149-CH4-SW1

Setting the Preferred Storage Location for Document Files

All documents of an application are stored either in the local sandbox or in an iCloud container directory. A user should not be able to select individual documents for storage in iCloud.

When an application launches for the first time on a device, it should do the following:

If iCloud is not configured, ask users if they want to configure it (and, preferably, transfer them to Launch Settings if they want to configure iCloud). If iCloud is configured but not enabled for the application, ask users if they want to enable iCloud—in other words, ask if they want all of their documents saved to iCloud. Store the response as a user preference. Based on this preference, an application writes document files either to the local application sandbox or the iCloud container directory. (For details, see “Moving Documents to and from iCloud Storage.”) An application should expose a switch in the Settings application that enables users to move documents between local storage and iCloud storage.

Answer 2

If it makes sense for your app, there is no reason Apple would care if you save some files locally and some in iCloud. It's not a hard fast rule to be all one way or the other.