在iOS中绘制六角形像饼图

Question

我画了一种有三种不同颜色的六边形。我为每一行都给了一种颜色。

这是我的代码;

- (void)drawRect:(CGRect)rect {
    self.colors = [[NSMutableArray alloc] initWithObjects:[UIColor yellowColor],[UIColor yellowColor],[UIColor blueColor],[UIColor blueColor],[UIColor greenColor],[UIColor greenColor], nil];
    [self addPointsToArray];

    CGPoint startPoint = [[self.points objectAtIndex:self.pointCounter] CGPointValue];
    CGPoint endPoint = [[self.points objectAtIndex:self.pointCounter+1] CGPointValue];
    UIColor *color = [self.colors objectAtIndex:self.pointCounter];
    [self drawingEachLineWithDifferentBezier:startPoint endPoint:endPoint color:color];

    self.pointCounter++;
}

- (void)addPointsToArray {
    self.points = [[NSMutableArray alloc] init];

    float polySize = self.frame.size.height/2;

    CGFloat hexWidth = self.frame.size.width;
    CGFloat hexHeight = self.frame.size.height;

    CGPoint center = CGPointMake(hexWidth/2, hexHeight/2);
    CGPoint startPoint = CGPointMake(center.x, 0);

    for(int i = 3; i >= 1 ; i--) {
        CGFloat x = polySize * sinf(i * 2.0 * M_PI / 6);
        CGFloat y = polySize * cosf(i * 2.0 * M_PI / 6);

        NSLog(@"x = %f, y= %f",x,y);

        CGPoint point = CGPointMake(center.x + x, center.y + y);
        [self.points addObject:[NSValue valueWithCGPoint:point]];
    }

    for(int i = 6; i > 3 ; i--) {
        CGFloat x = polySize * sinf(i * 2.0 * M_PI / 6);
        CGFloat y = polySize * cosf(i * 2.0 * M_PI / 6);
        CGPoint point = CGPointMake(center.x + x, center.y + y);
        [self.points addObject:[NSValue valueWithCGPoint:point]];
    }
    [self.points addObject:[NSValue valueWithCGPoint:startPoint]];
}

- (void)drawingEachLineWithDifferentBezier:(CGPoint)startPoint endPoint:(CGPoint)endPoint color:(UIColor *)color {
    UIBezierPath *path = [UIBezierPath bezierPath];
    [path moveToPoint:startPoint];
    [path addLineToPoint:endPoint];

    CAShapeLayer *pathLayer = [CAShapeLayer layer];
    pathLayer.frame = self.bounds;
    pathLayer.path = path.CGPath;
    pathLayer.lineCap = kCALineCapRound;
    //pathLayer.lineCap = kCALineCapSquare;

    pathLayer.strokeColor = [color CGColor];
    pathLayer.fillColor = nil;
    pathLayer.lineWidth = 15.0f;
    pathLayer.cornerRadius = 2.0f;
    pathLayer.lineJoin = kCALineJoinBevel;
    //pathLayer.lineDashPattern = @[@15]; 

    [self.layer addSublayer:pathLayer];

    CABasicAnimation *pathAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"];
    pathAnimation.duration = 0.3f;
    pathAnimation.fromValue = [NSNumber numberWithFloat:0.0f];
    pathAnimation.toValue = [NSNumber numberWithFloat:1.0f];
    pathAnimation.delegate = self;

    [pathLayer addAnimation:pathAnimation forKey:@"strokeEnd"];
}

- (void)animationDidStop:(CAAnimation *)theAnimation finished:(BOOL)flag{
    if (self.pointCounter < self.points.count - 1) {
        CGPoint startPoint = [[self.points objectAtIndex:self.pointCounter] CGPointValue];
        CGPoint endPoint = [[self.points objectAtIndex:self.pointCounter+1] CGPointValue];
        UIColor *color = [self.colors objectAtIndex:self.pointCounter];
        [self drawingEachLineWithDifferentBezier:startPoint endPoint:endPoint color:color];

        self.pointCounter++;
    }
}

我得到了这个观点。

我的目的是，我希望是黄色，直到3号线上的红点。所以我想如果我能找到红点coodinate，我可以在我的点数组中添加新点。比我可以从2点的末端画到黄色线到红点和蓝线从红点到3行的结束。

我的方向错了吗？如果我不是，我怎样才能找到红点坐标或你的建议是什么？

感谢您的回答和兴趣：）。