How do I interact with a slice in a Core Plot pie chart? [duplicate]

This question already has answers here:开发者_如何学编程 Closed 11 years ago.

Possible Duplicate:

How do you enable touch selection of a section in a Core Plot pie chart?

In looking through the Core Plot examples, I don't see a good sample for how to do touch-based interaction with the plots. In particular, I would like to be able to select a particular slice from a pie chart.

Does anyone know how to do this or have an example of this process?

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Maybe my answer for another question regarding this topic may help you:

How do you enable touch selection of a section in a Core Plot pie chart?