Design Element
Comment on "Saving Cocoa View Contents to an Image File"
by Jon Hess — Oct 23
The -[NSView cacheDisplayInRect: ... ] method will be much more pleasing if your view isn't opaque. cacheDisplayInRect: will only draw your view and won't capture any of the views behind it. The lock focus and use a bitmap image rep technique will end up picking up any of the views that 'show through' your view from behind.

For example, the cacheDisplayInRect method on a push button will only grab the push button while the first method will get the push button and the window background pattern.
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