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I have a 2D array of RGB values (assume they are NSColor objects or raw RGB 3-tuples of Doubles), one for each "pixel" of an image I want to draw. To produce the data is expensive so I can't keep running that function often. The data shouldn't be changing at all unless I add a manual function to do so. How do I simply draw it in an NSView?

For such a simple question I am getting swamped by different answers on the internet that aren't quite doing what I want. I started learning how to do this years ago in Obj-C. I just need the more efficient way to move on with my project.

I guess I subclass NSView and assign the class to the view in IB. What now?

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  • This question is far too broad to be answered in a reasonable way. Is there something you've already tried that didn't work? Perhaps there is a specific problem with regard to what you've already tried that some SO users would be able to help with? Commented Jul 25, 2017 at 21:03
  • Well I barely know what to try because I can't pick out from the internet what I need. There seem to be millions of methods and I'd rather not read an entire guide about everything on drawing on MacOS. I only need this simple function. I'd even just like to be pointed to the right example. Commented Jul 25, 2017 at 21:06
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    How about starting here: developer.apple.com/documentation/appkit/nsbitmapimagerep/…. Commented Jul 25, 2017 at 21:10
  • If there are no existing resources available to help you build your solution, then perhaps the desired function is not so simple after all? Commented Jul 25, 2017 at 21:10
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    Read this question: stackoverflow.com/questions/30958427/… It creates a CGImage from a pixel array, which you can easily convert to NSImage for display Commented Jul 26, 2017 at 2:24
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