StackOverflow2013

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There are at least two approaches: <ol> <li>Add QuartzCore.framework to your project, create a <code>UIBezierPath</code>, then create <code>CAShapeLayer</code> specifying its path, and then add the <code>CAShapeLayer</code> as a sublayer of your current view's layer. For example, I could call this from my view controller: <pre><code>#import <QuartzCore/QuartzCore.h> - (void)addCircle { UIBezierPath *path = [UIBezierPath bezierPath]; [path addArcWithCenter:CGPointMake(self.view.layer.bounds.size.width / 2.0, self.view.layer.bounds.size.height / 2.0) radius:self.view.layer.bounds.size.width * 0.40 startAngle:0.0 endAngle:M_PI * 2.0 clockwise:YES]; CAShapeLayer *layer = [CAShapeLayer layer]; layer.path = [path CGPath]; layer.strokeColor = [[UIColor darkGrayColor] CGColor]; layer.fillColor = [[UIColor lightGrayColor] CGColor]; layer.lineWidth = 3.0; [self.view.layer addSublayer:layer]; } </code></pre></li> <li>Subclass <code>UIView</code> and override <code>drawRect</code> to draw the circle with Core Graphics. <pre><code>@implementation CircleView - (void)drawRect:(CGRect)rect { CGContextRef context = UIGraphicsGetCurrentContext(); CGContextAddArc(context, self.bounds.size.width / 2.0, self.bounds.size.height / 2.0, self.bounds.size.width * 0.40, 0, M_PI * 2.0, YES); CGContextSetStrokeColorWithColor(context, [[UIColor redColor] CGColor]); CGContextSetFillColorWithColor(context, [[UIColor blueColor] CGColor]); CGContextSetLineWidth(context, 3.0); CGContextDrawPath(context, kCGPathFillStroke); } @end </code></pre></li> </ol> Both are valid. If you're not used to subclassing <code>UIView</code>, the former technique is probably easier. <h3>References</h3> The <a href="https://developer.apple.com/library/ios/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/Introduction/Introduction.html" rel="nofollow">Quartz 2D Programming Guide</a>
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1. PODrawing a circle for CLLocationManger region
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