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# NSEditorRegistration

A set of methods that controllers can implement to enable an editor view to inform the controller when it has uncommitted changes.

```
protocol NSEditorRegistration : NSObjectProtocol
```

## Overview

An implementor is responsible for tracking which editors have uncommitted changes, and sending those editors <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/commitEditing> and <doc://com.apple.documentation/documentation/ObjectiveC/NSObject-swift.class/discardEditing> messages, as appropriate, to force the editor to submit, or discard, their values.

[`NSController`](/documentation/AppKit/NSController) provides an implementation of this informal protocol. You would implement this protocol if you wanted to provide your own controller class without subclassing [`NSController`](/documentation/AppKit/NSController).

## Topics

### Instance Methods

[`objectDidBeginEditing(_:)`](/documentation/AppKit/NSEditorRegistration/objectDidBeginEditing(_:))

[`objectDidEndEditing(_:)`](/documentation/AppKit/NSEditorRegistration/objectDidEndEditing(_:))


---

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