PKCanvasView with transparent background / UIImageView overlay

Question

brinkin OP

Created Jul ’19

Replies 2

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Views 3.5k

Participants 3

Has anyone had success attempting to place a PKCanvasView in front of an image / UIImageView ?

Setting the canvas backgroundColor to clear appears to work correctly, however when finger/pencil touches down the background of the PKCanvasView reverts to black 100% alpha.

Thanks
Ben

Answered by brinkin in 374154022

I worked out the issue for anyone else having the same problem - you need to set isOpaque to false

canvasView = PKCanvasView()
canvasView.backgroundColor = .clear
canvasView.isOpaque = false

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Answer 1

brinkin OP

Jul ’19

Accepted Answer

I worked out the issue for anyone else having the same problem - you need to set isOpaque to false

canvasView = PKCanvasView()
canvasView.backgroundColor = .clear
canvasView.isOpaque = false

6

Answer 2

albert.tra OP

Mar ’20

Thanks so much for your code

0