I\'m in urgent need of an Objective-C/Cocoa/Cocoa Touch framework to handle simple charting; pie chards, histograms etc.
The only thing that comes close is:
I'll echo the suggestion of core-plot, and add some additional plotting references that may be of interest:
http://cocoaheads.byu.edu/resources/plot
I use Core Plot. See this blog post for a tutorial.
you can have a look at DSBarChart. It is a tiny library for creating Histograms.
this is also a legend lib for charts : https://github.com/danielgindi/Charts