`NSValue` containing an `NSAffineTransform` from Swift

Question

Created Jan ’23

Replies 1

Boosts 0

Participants 2

In trying to create a CIAffineTransform filter on MacOS X you are supposed to encode an NSAffineTransform using Objective-C code like:

[NSValue valueWithBytes:&xform
                           objCType:@encode(NSAffineTransform)];

But in Swift the Objective-C @encode directive does not exist in Swift.

How do you encode an NSAffineTransform into an NSValue in Swift so that it will be acceptable to Core Image?

Boost

Answer 1

FrankSchlegel OP

Jan ’23

I'm not sure what the best way to encode an NSAffineTransform into an NSValue is (maybe NSValue(nonretainedObject:)?), but there is actually a much simpler way for applying a transformation to an image using a CGAffineTransform:

let transformedImage = image.transformed(by: CGAffineTransform(...))

No need to use the CIAffineTransform filter.

0