mouse over on image object which was drawn on view

I have dr开发者_如何转开发awn an object on NSView subclass. How can the object know that mouse over is done

on it when mouse passes over it.

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If the object is neither NSView nor CALayer (that is, you draw it in your view's drawRect:), the recommended way is to use NSTrackingArea class. You will get the notifications you need sent to the NSView.