如何绘制旋转文本而不限于 MacRoman 字符集？

发布于 2024-08-19 14:36:13 字数 1670 浏览 6 评论 0原文

我的博客之前已经提到过，作为问题的答案。我无法链接到其中一个，因为此表单声称我是垃圾邮件发送者。叹。不管怎样，现在我想写一篇关于绘制旋转文本的权威博客文章，所以它也可以用于这里的答案（呵呵）。这是我的第一次尝试：

http:// /www.platinumball.net/blog/2009/06/01/drawing-nsstrings-in-unusual-rotations/

效果很好，它可以满足我想要的一切，除了事实上它使用 CGContextSelectFont()，它将文本输出限制为 MacRoman。那是德苏克。

我已经寻找这个问题的答案近一年了，包括多次搜索该网站，但没有成功。我见过一些看起来很接近我想要的例子，但显然我太愚蠢了，无法让它们屈服于我的意愿。我包含了我编写的 NSString 类别中的 main 方法，它显示了我正在做的事情的实质。如果您需要查看其余的代码，可以从我上面给出的博客链接下载。谢谢 ...

-(void)drawAtPoint:(CGPoint)point withFont:(UIFont*)font
 orientation:(WBOrientation)orient
{
    CGContextRef       ctxt = [self contextSave];
    const std::string  tbuf = toStdString(self, NSMacOSRomanStringEncoding);
    CGAffineTransform  tran = CGAffineTransformMake(1, 0, 0, -1, 0, 0);

    switch (orient)
    {
        case WBOrientUp:
        // nothing to do
        break;

        case WBOrientDown:
        tran = CGAffineTransformRotate(tran, degreesToRadians(180.0));
        break;

        case WBOrientLeft:
        tran = CGAffineTransformRotate(tran, degreesToRadians(90.0));
        break;

        case WBOrientRight:
        tran = CGAffineTransformRotate(tran, degreesToRadians(-90.0));
        break;

        default:
        assert(false);
        break;
    }

    contextFont(ctxt, font);
    CGContextSetTextDrawingMode(ctxt, kCGTextFill);
    CGContextSetTextMatrix(ctxt, tran);
    CGContextSetTextPosition(ctxt, point.x, point.y);
    CGContextShowText(ctxt, tbuf.c_str(), tbuf.length());

    [self contextRestore:ctxt];
}

原文

My blog has been mentioned here before as an answer to questions. I can't link to one of them, because this form claims I'm a spammer. Sigh. Anyway, now I want to write the definitive blog post on drawing rotated text, so it can also be used for answers here (heh). Here is my first try:

http://www.platinumball.net/blog/2009/06/01/drawing-nsstrings-in-unusual-rotations/

That works well, it does everything I want, except for the fact that it uses CGContextSelectFont(), which limits text output to MacRoman. That is Teh Sukk.

I've been searching for an answer to this problem for almost a year now, including searching this site several times, without success. I've seen examples that seem close to what I want, but apparently I'm too stupid to bend them to my will. I'm including the main method from the NSString category I wrote, which shows the guts of what I'm doing. If you need to see the rest of the code, you can download it from the link to my blog I gave above. Thanks ...

-(void)drawAtPoint:(CGPoint)point withFont:(UIFont*)font
 orientation:(WBOrientation)orient
{
    CGContextRef       ctxt = [self contextSave];
    const std::string  tbuf = toStdString(self, NSMacOSRomanStringEncoding);
    CGAffineTransform  tran = CGAffineTransformMake(1, 0, 0, -1, 0, 0);

    switch (orient)
    {
        case WBOrientUp:
        // nothing to do
        break;

        case WBOrientDown:
        tran = CGAffineTransformRotate(tran, degreesToRadians(180.0));
        break;

        case WBOrientLeft:
        tran = CGAffineTransformRotate(tran, degreesToRadians(90.0));
        break;

        case WBOrientRight:
        tran = CGAffineTransformRotate(tran, degreesToRadians(-90.0));
        break;

        default:
        assert(false);
        break;
    }

    contextFont(ctxt, font);
    CGContextSetTextDrawingMode(ctxt, kCGTextFill);
    CGContextSetTextMatrix(ctxt, tran);
    CGContextSetTextPosition(ctxt, point.x, point.y);
    CGContextShowText(ctxt, tbuf.c_str(), tbuf.length());

    [self contextRestore:ctxt];
}

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请叫√我孤独 2024-08-26 14:36:13

就在我自己做了几天后 =)

这就是我解决它的方法：

view.layer.transform = CATransform3DRotate(view.layer.transform, 3.1415, 0,0,1); // this is for 180 degrees.

only a few days after i did it myself =)

this is how i solved it:

view.layer.transform = CATransform3DRotate(view.layer.transform, 3.1415, 0,0,1); // this is for 180 degrees.

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隐诗 2024-08-26 14:36:13

使用 UIGraphicsPushContext 函数，然后使用 UIKit 绘制字符串，然后使用 UIGraphicsPopContext 函数。

AppKit (Mac) 解决方案本质上是相同的，使用 NSGraphicsContext 步骤 1 和 AppKit 的步骤 2 的 NSString 添加。对于 -[NSView drawRect:] 中的窗口上下文，步骤 3 消失（您将在步骤 1 中从 NSGraphicsPort 获取 CGContext，这意味着它已经设置） ;对于其他上下文，例如位图或 PDF 上下文，您将在步骤 1 和步骤 3 中使用相同的 NSGraphicsPort 方法 (setCurrentContext:)。