NSBezierPath圆角矩形有坏角
我有一个 NSBezierPath ，它制作了一个圆角矩形，但它的角看起来不连贯，并且在全尺寸查看时比笔画的其余部分显得更亮。我的代码是：
NSBezierPath *path = [NSBezierPath bezierPath];
[path appendBezierPathWithRoundedRect:NSMakeRect(0, 0, [self bounds].size.width, [self bounds].size.height) xRadius:5 yRadius:5];
NSGradient *fill = [[NSGradient alloc] initWithColorsAndLocations:[NSColor colorWithCalibratedRed:0.247 green:0.251 blue:0.267 alpha:0.6],0.0,[NSColor colorWithCalibratedRed:0.227 green:0.227 blue:0.239 alpha:0.6],0.5,[NSColor colorWithCalibratedRed:0.180 green:0.188 blue:0.196 alpha:0.6],0.5,[NSColor colorWithCalibratedRed:0.137 green:0.137 blue:0.157 alpha:0.6],1.0, nil];
[fill drawInBezierPath:path angle:-90.0];
[[NSColor lightGrayColor] set];
[path stroke];
这是两个角的图片（在小图片中不那么明显）：
任何人都知道是什么原因造成的？我只是错过了什么吗？
感谢您的帮助
I have an NSBezierPath that makes a rounded rectangle but the corners of it look choppy and appear brighter that the rest of the stroke when viewed at full scale. My code is:
NSBezierPath *path = [NSBezierPath bezierPath];
[path appendBezierPathWithRoundedRect:NSMakeRect(0, 0, [self bounds].size.width, [self bounds].size.height) xRadius:5 yRadius:5];
NSGradient *fill = [[NSGradient alloc] initWithColorsAndLocations:[NSColor colorWithCalibratedRed:0.247 green:0.251 blue:0.267 alpha:0.6],0.0,[NSColor colorWithCalibratedRed:0.227 green:0.227 blue:0.239 alpha:0.6],0.5,[NSColor colorWithCalibratedRed:0.180 green:0.188 blue:0.196 alpha:0.6],0.5,[NSColor colorWithCalibratedRed:0.137 green:0.137 blue:0.157 alpha:0.6],1.0, nil];
[fill drawInBezierPath:path angle:-90.0];
[[NSColor lightGrayColor] set];
[path stroke];
Heres a picture of 2 of the corners (Its not as obvious in a small picture):
Anyone know what's causing this? Am I just missing something?
Thanks for any help
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圆角矩形的直线正好位于视图的边界上，因此每条线的宽度的一半被切断。 （就好像它们在子像素上一样。）
尝试更改
为
如果
NSBezierPath看起来有点奇怪或模糊，请尝试将其移动半个像素。The straight lines of the roundrect are exactly on the borders of the view, so half the width of each line is getting cut off. (As if they were on a subpixel.)
Try changing
to
If an
NSBezierPathever looks a bit weird or blurry, try shifting it over half a pixel.查看
NSBezierPath文档中的setFlatness:方法。它控制渲染曲线的平滑程度。我相信将其设置为较小的数字（默认为 0.6）将产生更平滑的曲线，但代价是更多的计算（尽管对于简单的路径，我怀疑这很重要）。Take a look at the
setFlatness:method in theNSBezierPathdocs. It controls how smooth rendered curves are. I believe setting it to a smaller number (the default being .6) will yield smoother curves, at the cost of more computation (though for simple paths, I doubt it matters a whole lot).