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# init(cgEvent:)

Creates and returns an event object for a Core Graphics event.

```
init?(cgEvent: CGEvent)
```

## Parameters

`cgEvent`

A <doc://com.apple.documentation/documentation/CoreGraphics/CGEvent> opaque type that represents an event.

## Return Value

An autoreleased `NSEvent` object that is equivalent to `cgEvent`.

## Discussion

The returned object retains the `CGEventRef` object (`cgEvent`) until it (the Objective-C object) is freed—it then releases the `CGEventRef` object.  If no Cocoa event corresponds to the `CGEventRef` object, this method returns `nil`.

## See Also

[`var cgEvent: CGEvent?`](/documentation/AppKit/NSEvent/cgEvent)

The Core Graphics event object corresponding to this event.


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