Create a control for IOS that draws a Sector

SectorControl.h

#import <UIKit/UIKit.h>

@interface SectorControl : UIControl

@property UIColor* color;
@property UIColor* borderColor;

- (id) init:(float)angle withRadius:(float) radius andColor:(UIColor*) color andBorderColor:(UIColor*) borderColor;

@end

SectorControl.m

#import "SectorControl.h"

@implementation SectorControl

float alfa;
float r;
float x;
float y;
float r_y;
float x2;
CGRect frame;

- (id) init:(float)angle withRadius:(float) radius andColor:(UIColor*) color andBorderColor:(UIColor *)borderColor
{
    alfa = angle;
    r = radius;
    x = cos((M_PI/2) - (alfa/2)) * r;
    y = sqrtf(r*r - x*x);
    r_y = r-y;
    x2 = 2*x;
    frame = CGRectMake(0,0,r,x2);
    self.color = color;
    self.borderColor = borderColor;
    return [self initWithFrame:frame];
    
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.backgroundColor = [UIColor clearColor];
    }
    return self;
}


// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    [super drawRect:rect];
    // Drawing code
    
    UIBezierPath *path = [UIBezierPath bezierPath];
    path.lineWidth = 4.0f;
    [path moveToPoint:CGPointMake(r,x)];
    [path addLineToPoint:CGPointMake(r_y,0)];
    [path addArcWithCenter:CGPointMake(r,x) radius:r startAngle: 3*M_PI/2 - ((M_PI - alfa) / 2)endAngle: M_PI/2 + ((M_PI - alfa)/2) clockwise:FALSE];
    [path closePath];
    
    [self.color setFill];
    [self.borderColor setStroke];
    [path fill];
    [path stroke];
    
}


@end