gistfile1.m

CGSize size = CGSizeMake(90.0, 90.0);
      CGRect rect = CGRectMake(0, 0, size.width, size.height);
      UIGraphicsBeginImageContext(size);
      CGContextRef context = UIGraphicsGetCurrentContext();
      CGFloat radius = 5.0;
      CGFloat minx = CGRectGetMinX(rect), midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect);
      CGFloat miny = CGRectGetMinY(rect), midy = CGRectGetMidY(rect), maxy = CGRectGetMaxY(rect);
      
      // Rounded rect path
      CGMutablePathRef path = CGPathCreateMutable();
      // start at mid left
      CGPathMoveToPoint(path, NULL, minx, midy);
      // add upper left arc
      CGPathAddArcToPoint(path, NULL, minx, miny, midx, miny, radius);
      // add upper right arc
      CGPathAddArcToPoint(path, NULL, maxx, miny, maxx, midy, radius);
      // add lower right arc - Comment to create TearDrop Shape
      CGPathAddArcToPoint(path, NULL, maxx, maxy, midx, maxy, radius);
      // add lower left arc
      CGPathAddArcToPoint(path, NULL, minx, maxy, minx, midy, radius);
      // close path
      CGPathCloseSubpath(path);
      // add path to context
      CGContextAddPath(context, path);