如何以一定角度绘制 NSString? [英] How do I draw an NSString at an angle?

问题描述

是否可以指定一组字符串属性，以便在调用时以一定角度绘制文本:

Is there a set of string attributes I can specify that will draw the text at an angle when I call:

[label drawAtPoint:textStart withAttributes:attributes];

推荐答案

这是一个使用变换来旋转绘图上下文的示例.本质上就像设置颜色或阴影一样，只需确保使用 -concat 而不是 -set.

Here's an example that uses a transform to rotate the drawing context. Essentially it's just like setting a color or shadow, just make sure to use -concat instead of -set.

CGFloat rotateDeg = 4.0f;
NSAffineTransform *rotate = [[NSAffineTransform alloc] init];

[rotate rotateByDegrees:rotateDeg];
[rotate concat];

// Lock focus if needed and draw strings, images here.

[rotate release];

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