iOS drawrect ios6 v ios7 - ios

Question

I have an app that basically is a ring size app, I have stored all the CGRect frames in an array and then I pass them into a UIView class. So you can navigate through the array changing the size of the circle.
Works fine on all iOS7 devices, however on an iPad 3 running iOS6 the circle is displaying a different size to that of an iPad mini running iOS7.
What would be causing the discrepancy?
My drawrect code is as follows:
- (void)drawRect:(CGRect)rect
{
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(ctx, 0);
CGRect circlePoint = arect;
CGContextFillEllipseInRect(ctx, circlePoint);
CGColorSpaceRef baseSpace = CGColorSpaceCreateDeviceRGB();
CGGradientRef gradient = [UIColorFromRGB(0xecc7da) newGradientToColor:UIColorFromRGB(0xcc6699)];
CGColorSpaceRelease(baseSpace), baseSpace = NULL;
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
CGContextAddEllipseInRect(context, arect);
CGContextClip(context);
CGPoint gradCenter = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);
float gradRadius = MIN(arect.size.width , arect.size.height) ;
CGContextDrawRadialGradient (context, gradient, gradCenter, 0, gradCenter, gradRadius, kCGGradientDrawsAfterEndLocation);
CGGradientRelease(gradient), gradient = NULL;
CGContextRestoreGState(context);
CGContextAddEllipseInRect(context, arect);
CGContextDrawPath(context, kCGPathStroke);
}
Ok so an update, here is myView.h file :
#import <UIKit/UIKit.h>
#interface myView : UIView{
CGRect arect;
}
- (id)initWithFrame:(CGRect)frame shaperect:(CGRect)shaperect;
#end
And .m file:
#import "myView.h"
#import "UIColor+EasyGradients.h"
#implementation myView
- (id)initWithFrame:(CGRect)frame shaperect:(CGRect)shaperect;
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
arect = shaperect;
}
return self;
}
- (void)drawRect:(CGRect)rect
{
CGContextRef ctx = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(ctx, 0);
CGRect circlePoint = arect;
CGContextFillEllipseInRect(ctx, circlePoint);
CGColorSpaceRef baseSpace = CGColorSpaceCreateDeviceRGB();
CGGradientRef gradient = [UIColorFromRGB(0xecc7da) newGradientToColor:UIColorFromRGB(0xcc6699)];
CGColorSpaceRelease(baseSpace), baseSpace = NULL;
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSaveGState(context);
CGContextAddEllipseInRect(context, arect);
NSLog(#"x = %f | y = %f | w = %f | h = %f", arect.origin.x, arect.origin.y, arect.size.width, arect.size.height);
CGContextClip(context);
CGPoint gradCenter = CGPointMake(self.bounds.size.width/2, self.bounds.size.height/2);
float gradRadius = MIN(arect.size.width , arect.size.height) ;
CGContextDrawRadialGradient (context, gradient, gradCenter, 0, gradCenter, gradRadius, kCGGradientDrawsAfterEndLocation);
CGGradientRelease(gradient), gradient = NULL;
CGContextRestoreGState(context);
CGContextAddEllipseInRect(context, arect);
CGContextDrawPath(context, kCGPathStroke);
}
That file gets called and used from my viewcontroller whos .m code is something like this:
myView *myViewx = [[myView alloc] initWithFrame: container shaperect: CGRectFromString([arrayofRects objectForKey:#"0"])];
myViewx.backgroundColor = [UIColor clearColor];
myViewx.tag = 7;
[self.view addSubview:myViewx];