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Questions - cgcontext

CGContext 'addPath' to the existing drawing

I have a CGPath drawn in a custom UIView as follows. There is a refresh button that is supposed to add new line to the path already drawn. private func refresh() { self.setNeedsDisplay() } overr...
test-img

Deepak Sharma

ios

uiview

uikit

cgcontext

Votes: 0

Answers: 1

Latest Answer

You need to keep on hand a CGMutablePath, or a collection of CGPaths, so that you can keep accumulating new path parts in an actual CGPath. When draw is called, it has a rect. You are ignoring that pa...
test-img

matt

CGContext addPath to current path

I am confused by addPath() API of CGContextRef. The API documentation says If the source path is non-empty, then its path elements are appended in order onto the current path. The current transformati...
test-img

Deepak Sharma

ios

uiview

uikit

core-graphics

cgcontext

Votes: 0

Answers: 1

Latest Answer

If you have already stroked (or filled) the path, there is no current path in this context. The context's current path is cleared as soon as you stroke or fill it. If I were to actually append a subp...
test-img

matt

Force UIView to draw with specific scale (1 point = 1 pixel)

I'm doing a barcode printing feature, it generates a barcode view and then send the pixels data to the thermal printer. The process is below: Snapshot UIView with size 250x90 (points) to UIImage: le...
test-img

kientux

ios

uiview

uiimage

cgcontext

cgimage

Votes: 0

Answers: 0

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