Cocoa Is My Girlfriend

Here are some snippets to help with performing different tasks using Core Animation.

Images

• Convert NSImage to CGImageRef

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  - (CGImageRef)nsImageToCGImageRef:(NSImage*)image; { NSData * imageData = [image TIFFRepresentation]; CGImageRef imageRef; if(!imageData) return nil; CGImageSourceRef imageSource = CGImageSourceCreateWithData((CFDataRef)imageData, NULL); imageRef = CGImageSourceCreateImageAtIndex(imageSource, 0, NULL); return imageRef; }

Scaling

• Scale Up Five Times

  1 2	CATransform3D transform = CATransform3DMakeScale(5.0f, 5.0f, 5.0f); [layer setTransform:transform];

• Scale Down to Half Size

  1 2	CATransform3D transform = CATransform3DMakeScale(0.5f, 0.5f, 0.5f); [layer setTransform:transform];