iOS UIBezierPath,遵循字体的形状

时间:2012-05-15 11:00:54

标签: ios character uibezierpath

我是iOS新手。如何使我遵循字母表的UIBezierPath说“B”。目标是跟踪沿着这条道路的接触。

提前致谢。

2 个答案:

答案 0 :(得分:9)

CoreText.framework提供了获取单词

路径的方法

请参阅http://www.codeproject.com/Articles/109729/Low-level-text-rendering

Ole Begemann创建的代码示例。抱歉,我忘了为名为AnimatedPath的演示下载网址。

CGMutablePathRef letters = CGPathCreateMutable();

CTFontRef font = CTFontCreateWithName(CFSTR("Helvetica-Bold"), 72.0f, NULL);
NSDictionary *attrs = [NSDictionary dictionaryWithObjectsAndKeys:
                       (id)font, kCTFontAttributeName,
                       nil];
NSAttributedString *attrString = [[NSAttributedString alloc] initWithString:@"Hello World!"
                                                                 attributes:attrs];
CTLineRef line = CTLineCreateWithAttributedString((CFAttributedStringRef)attrString);
CFArrayRef runArray = CTLineGetGlyphRuns(line);

// for each RUN
for (CFIndex runIndex = 0; runIndex < CFArrayGetCount(runArray); runIndex++)
{
    // Get FONT for this run
    CTRunRef run = (CTRunRef)CFArrayGetValueAtIndex(runArray, runIndex);
    CTFontRef runFont = CFDictionaryGetValue(CTRunGetAttributes(run), kCTFontAttributeName);

    // for each GLYPH in run
    for (CFIndex runGlyphIndex = 0; runGlyphIndex < CTRunGetGlyphCount(run); runGlyphIndex++) 
    {
        // get Glyph & Glyph-data
        CFRange thisGlyphRange = CFRangeMake(runGlyphIndex, 1);
        CGGlyph glyph;
        CGPoint position;
        CTRunGetGlyphs(run, thisGlyphRange, &glyph);
        CTRunGetPositions(run, thisGlyphRange, &position);

        // Get PATH of outline
        {
            CGPathRef letter = CTFontCreatePathForGlyph(runFont, glyph, NULL);
            CGAffineTransform t = CGAffineTransformMakeTranslation(position.x, position.y);
            CGPathAddPath(letters, &t, letter);
            CGPathRelease(letter);
        }
    }
}
CFRelease(line);

UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointZero];
[path appendPath:[UIBezierPath bezierPathWithCGPath:letters]];

CGPathRelease(letters);
CFRelease(font);

将“Hello World!”改为“你需要的词”。

答案 1 :(得分:0)

对于Quartz2D中的绘图,我使用名为PaintCode(http://www.paintcodeapp.com/)的OSX应用程序。它基本上是一个矢量绘图应用程序,它生成你所做的绘图的石英代码。实际上它非常棒。有一个类似的应用程序叫做Opacity,但我没试过。

使用此类应用程序,您可以在后台输入B作为指南,并在其上绘制BezierPath。完成后,只需复制生成的代码并将其粘贴到项目中即可。

希望它有所帮助。