shineCircles

shineCircleLayer

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *yellowView;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor blackColor];

//    UIImage *img = [UIImage imageNamed:@"head.png" ];
//    _yellowView.layer.contents = (__bridge id)img.CGImage;
    
    NSLog(@"keys : %@", _yellowView.layer.animationKeys);
    
    _yellowView.layer.cornerRadius = _yellowView.bounds.size.width/2;
    _yellowView.layer.masksToBounds = YES;

//    _imageView.layer.cornerRadius = _yellowView.bounds.size.width/2 ;
//    _imageView.layer.masksToBounds = YES;
    
    CAShapeLayer *layer = [CAShapeLayer layer];
    layer.lineWidth = 2.0f;
    layer.fillColor = NULL;
    layer.path = [UIBezierPath bezierPathWithOvalInRect:CGRectInset(_imageView.bounds, 0, 0)].CGPath;
    layer.strokeColor = [UIColor colorWithRed:0 green:0 blue:1 alpha:0.8].CGColor;
    layer.contentsScale =  [UIScreen mainScreen].scale * 2;
    layer.shadowOffset = CGSizeZero;
    layer.shadowOpacity = 0;
    layer.shadowRadius = 4;
    layer.shadowColor = [UIColor whiteColor].CGColor;
    layer.shouldRasterize = NO;
    
    [_imageView.layer addSublayer:layer];
    
    [self shineAnimationAddto:layer];
}

- (void)pluseAnimationAddto:(CALayer *)layer {
    
    CIFilter *filter = [CIFilter filterWithName:@"CIFalseColor"];
    [filter setDefaults];
    [filter setValue:[CIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:1.0] forKey:@"inputColor0"];
    [filter setValue:[CIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0] forKey:@"inputColor1"];
//    [filter setName:@"pulseFilter"];
    [layer setFilters:[NSArray arrayWithObject:filter]];
    
    CABasicAnimation* pulseAnimation = [CABasicAnimation animation];
    pulseAnimation.keyPath = @"filters.pulseFilter.inputColor1";
    
    pulseAnimation.fromValue = [CIColor colorWithRed:1.0 green:1.0 blue:1.0 alpha:1.0];
    pulseAnimation.toValue = [CIColor colorWithRed:0.995 green:1.0 blue:0.655 alpha:1.0];
    
    pulseAnimation.duration = 0.3;
    pulseAnimation.repeatCount = 1;
    pulseAnimation.autoreverses = YES;
    
    [ layer addAnimation:pulseAnimation forKey:@"pulseAnimation"];
}


- (void)shineAnimationAddto:(CALayer *)layer {
    CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"shadowOpacity"];
    anim.fromValue = @0;
    anim.toValue = @1;
    anim.repeatCount = NSIntegerMax;
    anim.autoreverses = YES;
    anim.duration = 2.0;
    anim.timingFunction =
    [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    
    [layer addAnimation:anim forKey:@"shine"];
}


/*
- (void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx {
    CGContextRef context = ctx;
    // circumscribe the polygons
    CGContextSetLineWidth(context, 2); // set the line width
    CGContextSetRGBStrokeColor(context, 20.0 /255, 101.0 / 255.0, 18.0 / 255.0, 1.0);
    
    CGRect rect = self.yellowView.frame;
    
    CGPoint center = CGPointMake(rect.size.width / 2, rect.size.height / 2); // get the circle centre
    CGFloat radius = 0.9 * center.x; // little scaling needed
    CGFloat startAngle = -((float)M_PI / 2); // 90 degrees
    CGFloat endAngle = ((2 * (float)M_PI) + startAngle);
    CGContextAddArc(context, center.x, center.y, radius + 4, startAngle, endAngle, 0); // create an arc the +4 just adds some pixels because of the polygon line thickness
    CGContextStrokePath(context); // draw
    
    // inscribed circle
    float angle = M_PI - ((2 * M_PI) / 4);//polygon.numberOfSides); // need the polygon angles
    CGContextSetLineWidth(context, 2); // set the line width
    CGContextSetRGBStrokeColor(context, 20.0 / 255, 101.0 / 255.0, 211.0 / 255.0, 1.0);
    CGFloat innerradius = (0.9 * center.x) * sin(angle / 2); // calc the inner radius
    CGContextAddArc(context, center.x, center.y, innerradius - 3, startAngle, endAngle, 0); // create an arc the minus 3 subtracts some pixels because of the polygon line thickness
    CGContextStrokePath(context); // draw
}*/


@end