用贝舍尔曲线绘制分段闭合圆环

-(void)createCircleWithCount:(CGFloat)count num:(CGFloat)num
{
    if(count <= 0 || num < 0 || num > count)
    {
        return;
    }
    else if(num == count || 0 == num)
    {
        CAShapeLayer *layer = [CAShapeLayer new];
        layer.lineWidth = 7.5;
        //圆环的颜色
        if(0 == num)
        {
            layer.strokeColor = [UIColor whiteColor].CGColor;
        }
        else
        {
            layer.strokeColor = BGColorHex(FFC67B).CGColor;
        }
        
        //背景填充色
        layer.fillColor = [UIColor clearColor].CGColor;
        //设置半径为10
        CGFloat radius = 49;
        //按照顺时针方向
        BOOL clockWise = NO;
        //初始化一个路径
        UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(FULL_WIDTH - COMMON_EDGE_DISTANCE -49,  (FULL_WIDTH*222.5/375*3/4-98 -28.5)/2 +49) radius:radius startAngle:0 endAngle:2*M_PI clockwise:clockWise];
        layer.path = [path CGPath];
        [self.evaluatingReportBackgroundHeadView.layer addSublayer:layer];
        return;
    }
    CGFloat endAngle = num/count;
    if(endAngle <= 0.5)
    {
        endAngle = M_PI - endAngle *M_PI*2;
    }
    else
    {
        endAngle = M_PI + (1 - endAngle) *2*M_PI;
    }
    CAShapeLayer *layer = [CAShapeLayer new];
    layer.lineWidth = 7.5;
    //圆环的颜色
    layer.strokeColor = BGColorHex(FFC67B).CGColor;
    //背景填充色
    layer.fillColor = [UIColor clearColor].CGColor;
    //设置半径为10
    CGFloat radius = 49;
    //按照顺时针方向
    BOOL clockWise = NO;
    //初始化一个路径
    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(FULL_WIDTH - COMMON_EDGE_DISTANCE -49,  (FULL_WIDTH*222.5/375*3/4-98 -28.5)/2 +49) radius:radius startAngle:(1*M_PI) endAngle:endAngle clockwise:clockWise];
    layer.path = [path CGPath];
    [self.evaluatingReportBackgroundHeadView.layer addSublayer:layer];
    
    layer = [CAShapeLayer new];
    layer.lineWidth = 7.5;
    //圆环的颜色
    layer.strokeColor = [UIColor whiteColor].CGColor;
    //背景填充色
    layer.fillColor = [UIColor clearColor].CGColor;
    //设置半径为10
    radius = 49;
    //按照顺时针方向
    clockWise = YES;
    //初始化一个路径
    path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(FULL_WIDTH - COMMON_EDGE_DISTANCE -49,  (FULL_WIDTH*222.5/375*3/4-98 -28.5)/2 +49) radius:radius startAngle:(1*M_PI) endAngle:endAngle clockwise:clockWise];
    layer.path = [path CGPath];
    [self.evaluatingReportBackgroundHeadView.layer addSublayer:layer];
}