Charts: Empty LineChart reports "[Unknown process name] CGAffineTransformInvert: singular matrix." in SwiftUI view!

Created on 19 Feb 2021 · 2Comments · Source: danielgindi/Charts

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McWare

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Charts version: 3.6.0
Xcode version: Version 12.4 (12D4e)
Swift version: 5
Platform(s) running Charts: iOS v14.4
macOS version running Xcode: macOS Big Sur 11.2.1 (20D74)

Problem/Bug:
A a LineChart constructed as UIViewRepresentable in SwiftUI will get " [Unknown process name] CGAffineTransformInvert: singular matrix." when displaying an empty chart (no data).

The message is generated when internal drawing calls lowestVisibleX and highestVisibleX function getTransformer(forAxis: .left).pixelToValues(&pt). to be more specific: pixelToValues wants to apply an inverted pixel to value matrix calling valueToPixelMatrix.inverted() which in this case produces an invalid empty CGAffineTransform...

I've included a small project to show the problem.
ChartTest.zip

McWare on 19 Feb 2021

👍2

All 2 comments

Charts version: 3.6.0
Xcode version: Version 12.4 (12D4e)
Swift version: 5
Platform(s) running Charts: iOS v14.4
macOS version running Xcode: macOS Big Sur 11.2.1 (20D74)

Problem/Bug:
A a LineChart constructed as UIViewRepresentable in SwiftUI will get " [Unknown process name] CGAffineTransformInvert: singular matrix." when displaying an empty chart (no data).

I've included a small project to show the problem.
ChartTest.zip

McWare on 19 Feb 2021

👍2

This is still an issue in SwiftUI