barWidth Method and barPadding property should be in JBBarChartView header file.

[kidsid49]

For showing labels on x-axis properly one should have to knowledge of the barWidth and barPadding.
I think they should be in API instead of in implementation file.

[terryworona]

I'd like to keep these private for now.

If you really need access to them, simply create a private interface for JBBarChartView:

@interface JBBarChartView (Private)

- (CGFloat)barPadding;
- (CGFloat)barWidth;

@end 

You should wrap your calls in @performsSelector to stay safe.

[radianttap]

Terry, what do you mean by "create private interface"? If I add my own category to JBBarChartView, barWidth and barPadding as not visible to it, since they are private method/property.