Flip UIImage Along Either Axis

Question

I\'m trying to create a method which flips a UIImage along the X axis, Y axis, or both. I keep getting close but my transform knowledge isn\'t good enough to get all the way

Answer 1

Swift 3 version:

func flipV(im:UIImage)->UIImage {
        var newOrient:UIImageOrientation
        switch im.imageOrientation {
        case .up:
            newOrient = .downMirrored
        case .upMirrored:
            newOrient = .down
        case .down:
            newOrient = .upMirrored
        case .downMirrored:
            newOrient = .up
        case .left:
            newOrient = .leftMirrored
        case .leftMirrored:
            newOrient = .left
        case .right:
            newOrient = .rightMirrored
        case .rightMirrored:
            newOrient = .right
        }
        return UIImage(cgImage: im.cgImage!, scale: im.scale, orientation: newOrient)
    }

    func flipH(im:UIImage)->UIImage {
        var newOrient:UIImageOrientation
        switch im.imageOrientation {
        case .up:
            newOrient = .upMirrored
        case .upMirrored:
            newOrient = .up
        case .down:
            newOrient = .downMirrored
        case .downMirrored:
            newOrient = .down
        case .left:
            newOrient = .rightMirrored
        case .leftMirrored:
            newOrient = .right
        case .right:
            newOrient = .leftMirrored
        case .rightMirrored:
            newOrient = .left
        }
        return UIImage(cgImage: im.cgImage!, scale: im.scale, orientation: newOrient)
    }