Type Property

autosavesDrafts

Returns whether the receiving subclass of NSDocument supports autosaving of drafts.

Declaration

@property(class, readonly) BOOL autosavesDrafts;

Return Value

YES if the receiving subclass of NSDocument supports autosaving of drafts; otherwise NO.

Discussion

The system expects that an NSDocument subclass that returns YES from this method can properly handle save operations that use the NSAutosaveAsOperation save operation type.

The default implementation of this method returns YES for apps linked on or after OS X v10.8, and returns no for apps linked against earlier versions of macOS.

To opt out of autosaving in your NSDocument subclass when linking on or after OS X v10.8, override this method to return NO.

When linking against a macOS version prior to 10.8, you can declare that your NSDocument subclass supports autosaving by overriding this method to return YES.

AppKit invokes this method at various times. For example, when the updateChangeCount: method is called with NSChangeDone but without the NSChangeDiscardable change type, NSDocument will the next autosave to use NSAutosaveAsOperation and return the document into a draft.

Do not invoke this method to find out whether autosaving of a draft will be done.

See Also

Autosaving

- checkAutosavingSafetyAndReturnError:

Returns a Boolean value indicating whether it is probably safe to autosave document changes.

- scheduleAutosaving

Schedules periodic autosaving for the purpose of crash protection.

hasUnautosavedChanges

A Boolean value indicating whether the document has changes that have not been autosaved.

- autosaveDocumentWithDelegate:didAutosaveSelector:contextInfo:

Autosaves the document’s contents at an appropriate location.

- autosaveWithImplicitCancellability:completionHandler:

Autosaves the document’s contents at an appropriate location if it needs autosaving.

autosavesInPlace

Returns whether the receiver supports autosaving in place.

preservesVersions

Returns whether the receiving subclass of NSDocument supports Versions.

- browseDocumentVersions:

Opens the Versions browser in the document’s main window.

autosavingFileType

Returns the document type that should be used for an autosave operation.

autosavingIsImplicitlyCancellable

A Boolean value indicating whether autosaving is happening now but could be safely cancelled.

autosavedContentsFileURL

The location of the most recently autosaved document contents.