Simple example of custom drawing

CustomView

@implementation LHLPrettyView

// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    CGSize totalSize = self.bounds.size;
    CGFloat fraction = 0.8;
    
    CGFloat radius = rintf(MIN(totalSize.height * fraction / 2, totalSize.width * fraction / 2)); // Why did we use rintf?
    
    [[UIColor redColor] setFill]; // Note: single fill color
    
    CGFloat offset = 100.0;
    CGPoint center = self.center;
    CGPoint arc1Center = CGPointMake(center.x, center.y-offset);
    CGPoint arc2Center = CGPointMake(center.x, center.y+offset);
    
    UIBezierPath* path = [UIBezierPath bezierPathWithArcCenter:arc1Center
                                                        radius:radius
                                                    startAngle:0.0
                                                      endAngle:M_PI
                                                     clockwise:NO];
    [path addArcWithCenter:arc2Center
                    radius:radius
                startAngle:M_PI
                  endAngle:2*M_PI
                 clockwise:NO];
    
    [path closePath]; // tell the path to draw in current context
    [path fill]; // apply current fill to path
}

@end