如何旋转的的NSCell

Question

我提出了NSLevelIndicatorCell的子类，我想垂直绘制。这不工作，我究竟做错了什么？

- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView{
[[NSGraphicsContext currentContext] saveGraphicsState];
NSAffineTransform *transform = [NSAffineTransform transform];
[transform rotateByDegrees:90];
[transform concat];
[super drawWithFrame:cellFrame inView:controlView];
[[NSGraphicsContext currentContext] restoreGraphicsState];}

Answer 1

[self setBoundsRotation:90];

[self setNeedsDisplay];

现在，我只需要弄清楚如何从水平得到可调整大小的边缘变垂直...