#import "arcView.h"
#import <QuartzCore/QuartzCore.h>

@implementation arcView

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.layer.contents = (__bridge id)([[self generateArc]CGImage]);
    }
    return self;
}
-(UIImage*)generateArc{
    UIGraphicsBeginImageContext(self.frame.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetRGBStrokeColor(context, 1.0, 0, 0, 1);
    CGContextSetLineWidth(context, 2);
    CGContextSetLineCap(context, kCGLineCapButt);
    CGContextAddArc(context,
                    self.frame.size.height/2, self.frame.size.height/2,
                    self.frame.size.height/2 - 2,0.0,M_PI_4,NO);
    CGContextStrokePath(context);
    UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return result;
}
-(void)animate{
    CABasicAnimation *rotate = [CABasicAnimation animationWithKeyPath:@"rotation"];
    rotate.fromValue = [NSNumber numberWithFloat:0];
    rotate.toValue = [NSNumber numberWithFloat:360];
    rotate.duration = 1.0;
    rotate.repeatCount = 999999;
    rotate.fillMode = kCAFillModeForwards;
    rotate.removedOnCompletion = NO;
    [self.layer addAnimation:rotate forKey:@"rotation"];
}
@end