CGContext 没有画出我的形状

Question

我正在尝试在UIView 中绘制一个六边形。我通过覆盖UIView 的子类中的drawRect 方法来做到这一点。 但是当显示视图时，我只看到view 的backgroundColor，但我没有看到我的形状正在其中绘制。

这是我的-drawRect 方法中的代码

CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColor(context, CGColorGetComponents([_fillColor CGColor]));

    NSArray *points = _hex.points;

    CGPoint point = [points[0] CGPointValue];
    CGContextMoveToPoint(context, point.x, point.y);

    for (int i = 1; i < [points count]; i++){
        CGContextAddLineToPoint(context, point.x, point.y);
    }


    CGContextClosePath(context);
    CGContextDrawPath(context, kCGPathFill);

正在绘制的数组如下：

  NSMutableArray *mutablePoints = [NSMutableArray arrayWithCapacity:6];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(40, 0)]];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(59, 0)]];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(68.5, 16.4544)]];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(59, 32.9089)]];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(40, 32.9089)]];
    [mutablePoints addObject:[NSValue valueWithCGPoint:CGPointMake(30.5, 16.4544)]];

Answer 1

您不会更改循环中的点！ 只需添加：

point = [points[i] CGPointValue]

在你的循环中？

Answer 2

编辑：你在for循环中忘记在线查看这段代码

  for (int i = 1; i < [points count]; i++) {

        point = [points[i] CGPointValue]; // YOU FORGOT !

        CGContextAddLineToPoint(context, point.x, point.y);
    }