gistfile1.txt

init 

    _chartViewDisk   = [[LPPieChartView alloc] initWithFrame:diskViewFrame];
    [_chartViewDisk setDrawView:[[TNPieChartDrawView alloc] init]];
    [viewGraphDisk addSubview:_chartViewDisk];


subclass
@implementation TNPieChartDrawView : LPPieChartDrawView

- (void)drawInContext:(CGContext)context paths:(CPArray)paths
{
    /*
        Overwrite this method in your subclass.
    */
    CGContextSetLineWidth(context, 1.0);
    CGContextSetStrokeColor(context, [CPColor whiteColor]);
    
    var fillColors = [[CPColor grayColor], [CPColor blueColor]];
    
    for (var i = 0; i < paths.length; i++)
    {
        CGContextBeginPath(context);
        CGContextAddPath(context, paths[i]);
        CGContextClosePath(context);

        CGContextSetFillColor(context, fillColors[i]);

        CGContextFillPath(context);
        CGContextStrokePath(context);
    }
}

@end