How to display numbers as grid marks along axes for plotting in Swift Charts?

Question

Created Apr ’25

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If you try to add a graph for a function in Apple Notes you can see that numbers marking coordinates are positioned along the axes (see screenshot 1).

But when I am making my own plot view with Swift Charts I don't see that option. Marks for X axis are positioned at the bottom, and marks for Y axis are positioned to the right. I don't see an API that can configure them to be shown along the axes.

Screenshot 2025-04-06 at 22.00.15.png

Is there something that I am missing? Or is Apple just using some private API for that?

I could make a custom overlay to display these marks, but then I will have to adjust them while zooming myself, which can be problematic.

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Answer 1

OP

Apple

Jun ’25

Swift Charts doesn't currently support real, zero-line axes; they're always at the edge of the plot area.

But you can create, for example, a zero-size PointMark, and/or a RuleMark acting as tick lines, and add an annotation for each value. You'll need to work with accessibility modifiers to avoid representing these visual annotation marks as actual data.

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