How do I save PKDrawing in Swift with white background

Asked Jul 15 '21 at 05:09

Active Jul 15 '21 at 05:57

Viewed 457 times

I am using PencilKit framework to capture a user's drawing and save it.

I want to save a user input drawing with a white background. The image should look like this, where the canvas background I have is white.

I use the UIImage api from drawing.image(from: bounds, scale: 1.0) and save it. On saving the image, I get the following instead

It seems the background has been removed, although I want it kept. I want to later later convert the image into pixel values where white = 255 and black = 0 intensity.

How do I do this with Swift?

Thank you all for your guidance and help.

edited Jul 15 '21 at 05:57

jnpdx

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asked Jul 15 '21 at 05:09

calveeen

Isn't it just the matter of saving a `PKDrawing` object with `NSKeyedArchiver`? – El Tomato Jul 15 '21 at 06:01
Hi I have not heard of NSKeyArchiver as I am new to Swift. Could you elaborate on how to do so? – calveeen Jul 15 '21 at 06:25
I managed to solve it by overlaying the original image with a white UIImage background! – calveeen Jul 15 '21 at 07:50

How do I save PKDrawing in Swift with white background

0 Answers0