iphone - 在iphone上画一个不规则的多边形

Question

我有这个问题：我有一个点数组，我会用 Quartz 或类似的点绘制一个不规则多边形。你能建议我做这个的最好方法吗？

MyTest drawRect 是这样的：

- (void)drawRect:(CGRect)rect
{
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    CGContextClearRect(ctx, rect);

    CGContextSetRGBStrokeColor(ctx, 255, 0, 255, 1);
    CGPoint points[6] = { CGPointMake(100, 200), CGPointMake(150, 250),
        CGPointMake(150, 250), CGPointMake(50, 250),
        CGPointMake(50, 250), CGPointMake(100, 200) };
    CGContextStrokeLineSegments(ctx, points, 6);
}

Answer 1

您可以使用 UIBezierPath / NSBezierPath：

UIBezierPath *poly = [[UIBezierPath alloc] init];
[poly moveToPoint:CGPointMake(0.0, 0.0)];
[poly addLineToPoint:CGPointMake(1.0, 0.0)];
[poly addLineToPoint:CGPointMake(1.0, 1.0)];
[poly closePath];
[poly stroke]; // draw stroke
[poly release];