Circle Bloom!?

CircleBloom.h

//
//  CircleBloom.h
//  Blackbox
//
//  Created by Ryan McLeod on 7/25/16.
//  Copyright © 2016 Ryan McLeod. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface CircleBloom : UIView

@property (strong, nonatomic, readonly) NSArray *blooms;

- (instancetype) initWithFrame:(CGRect)frame bloomCount:(NSUInteger)count bloomRadius:(CGFloat)radius bloomSpread:(CGFloat)spread;

@end

CircleBloom.m

//
//  CircleBloom.m
//  Blackbox
//
//  Created by Ryan McLeod on 7/25/16.
//  Copyright © 2016 Ryan McLeod. All rights reserved.
//

#import "CircleBloom.h"

@interface CircleBloom ()
@end

@implementation CircleBloom {
    NSUInteger bloomCount;
    CGFloat    bloomRadius;
    CGFloat    bloomSpread;
}

- (instancetype) initWithFrame:(CGRect)frame bloomCount:(NSUInteger)count bloomRadius:(CGFloat)radius bloomSpread:(CGFloat)spread {
    self = [super initWithFrame:frame];
    if (self) {
        bloomCount  = count;
        bloomRadius = radius;
        bloomSpread = spread;
    }
    return self;
}

- (void) drawRect:(CGRect)rect {
    [super drawRect:rect];
    
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetBlendMode(context, kCGBlendModeScreen);
    
    
    for (int ctr = 0; ctr < bloomCount; ctr++) {
        
        // Save current context
        CGContextSaveGState(context);
        // Set our anchor point to the center of the rect
        CGContextTranslateCTM(context, CGRectGetMidX(rect), CGRectGetMidY(rect));
        // Rotate from anchor point
        CGFloat rotation = ctr * (2*M_PI / (1.f*bloomCount));
        CGContextRotateCTM(context, rotation);
        // Translate away from center
        CGContextTranslateCTM(context, -bloomRadius, -(2*bloomRadius + bloomSpread));



        CGRect circleFrame = CGRectMake(0, 0, 2*bloomRadius, 2*bloomRadius);
        
        UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:circleFrame];
        CGContextAddPath(context, [path CGPath]);
        CGContextSetFillColorWithColor(context, [[UIColor cyanColor] CGColor]);
        CGContextSetStrokeColorWithColor(context, nil);
        CGContextDrawPath(context, kCGPathFill);
        
        // Restore context for next circle
        CGContextRestoreGState(context);
    }
}

@end