Core Plot draws the data points in the order they appear in the datasource. You'll need to reorder the data so the top-most bubble is at the last index and call -reloadData
on the plot to tell it to refresh its data. If you have the data points in an array, sort it by the desired z-index (back to front) and use the sorted array to feed the datasource.
CPTXYScatterPlot - Can I set the Z order of plot symbols?
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08-10-2022 - |
Frage
Using Core Plot's CPTScatterPlot, I've made a bubble chart that looks like the above.
I've implemented plotSymbolWasSelectedAtRecordIndex
in my delegate so I can detect when the user touches one of the bubbles. Using this screenshot as an example, I want to be able to highlight the yellow bubble and bring it in front of the red one when the user touches it. In graphical terms, I want to set the Z order of the selected CPTPlotSymbol
to be higher than the others. How can I accomplish that? I'm able to highlight the selected bubble by drawing it in a different color in my symbolForScatterPlot
method, but I can't seem to find a way to make it draw in front of the overlapping symbol.
Lösung
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