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swiftswift3

.applying (transform) unresolved

Why is .applying (transform) unresolved? Also why there is no imageByApplying anymore?

let output = filter?.outputImage?.applying(transform)
        if (output != nil) {
            return UIImage(CIImage: output!)
}
        return nil;
}
Solution

  • The unresolved identifier is probably UIImage(CIImage. In Swift 3 it's UIImage(ciImage

    Better optional bind outputImage.

    If the check succeeds the transform (which does not return an optional) will be applied

    if let output = filter?.outputImage {
    return UIImage(ciImage: output.applying(transform))
}
return nil

    or preferable

    guard let output = filter?.outputImage else { return nil }
return UIImage(ciImage: output.applying(transform))

    applying(_ is the Swift 3 syntax of former imageByApplying