Graph generation on iPhone [closed]

Question

Anyone have experience with drawing graphs on the iPhone? Looks like GraphKit isn't an option, so it's up to the programmer to either write his own library (using OpenGL, I guess), or an existing library. I can't seem to find any libraries that are confirmed to work on the iPhone.

If you've written your own how did you go about it (opengl, quartz, etc), or if you used a library which one?

Answer 1

I have been keeping my eye on this one:

core-plot

but I haven't yet tried it. Though it seams like it has potential.

chris.

Answer 2

Ive used coreplot...got an appstore app with it...not thrilled about its use. Its very customizable, maybe TOO customizable. It gave me quite a bit of trouble setting it up and i still have problems with is. Id like to know how Roambi.com does their porting from excel, it looks pretty good. MSOffice4mac should just come out with a direct port to iphone

Answer 3

Have tried and used CorePlot, on my way to a app-store app. Was a pain setting it up and then digging in deep, certainly the best graphing option currently.

Answer 4

I've done graphs in an application before using Quartz2D. Since the graph was particularly wide, I had to use a CATiledLayer for the view, which I think was what caused more issues than it fixed. The graph looked nice, but in the end, it was just too difficult to deal with. Too many bugs when trying to draw too much of the graph at once, or trying to draw the graph several times in a row quickly as the user changes between different views.

At this point, my suggestion would be to try something in OpenGL, though I don't know how you'd go about achieving it, since line drawing is pretty basic on the iPhone in OpenGL.