RulerView | simple ruler library for android , with Calibration
kandi X-RAY | RulerView Summary
kandi X-RAY | RulerView Summary
simple Ruler library response to user's actions give you accurate measurement in millimeter, with Calibration and Dimension measurement for Android, see project on GitHub. Library Size just ~ 18 KB.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of RulerView
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RulerView Examples and Code Snippets
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QUESTION
I am trying to draw a ruler on top of UIScrollView. The way I do it is by adding a custom view called RulerView. I add this rulerView to superview of scrollView setting its frame to be same as frame of scrollView. I then do custom drawing to draw lines as scrollView scrolls. But the drawing is not smooth, it stutters as I scroll and the end or begin line suddenly appears/disappears. What's wrong in my drawRect?
...ANSWER
Answered 2020-Oct-27 at 14:11Your override func draw(_ rect: CGRect)
is very "heavy." I think you'll get much better performance by using a shape layer for your "tick marks" and letting UIKit
handle the drawing.
Edit - as per comments
Added numbering to the tick marks using CATextLayer
as sublayers.
Here's a sample RulerView
(using your tick mark dimensions and spacing):
QUESTION
So I am not fully understanding how this needs to be implemented in SwiftUI for it to work properly.
I have the following code:
...ANSWER
Answered 2020-Apr-18 at 04:04The UIView
needs to be wrapped into UIViewRepresentable
to be used in SwiftUI, like below.
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