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Day 83 - Hot Prospects (Project 16 part 5) question about: filter.setValue(data, forKey: "inputMessage")

Forums > 100 Days of SwiftUI

Where does “inputImage” come from? Back in Day 67 when Core Image filters were introduced, the keys used were all documented Core Image constants (e.g., kCI…).

I have searched the online Apple developer documentation and can not find the String value for the forKey: parameter in …

CIFilter.qrCodeGenerator().setValue(Data(string.utf8), forKey: "inputMessage")

… documented as String: "inputMessage”.

Perhaps I do not know how to navigate or search Apple’s developer doc. I’ve looked all over the CoreImage doc - I find no reference to the forKey: parameter value of “inputMessage”.

I’m just trying to make sure I know how to use the online developer documentation effectively.

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You can find it here: Core Image Filter Reference

I got there from the main Core Image page

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