How to save CGPath in svg or pdf? [closed] - objective-c

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Hi, i am still new at mac and objective-c.
I searched a few hours to answer my question, but i did not get anywhere.
I want to draw some simple 2D path / object and save it to a svg or pdf file.
My plan was to create a CGPath (i already know how to do that) and afterwards export it to svg or pdf file on my disk.
I would be very thankful if anyone has some kind of code snippet or tutorial, where this is explained.
Hopefully, NL.

Answer 1

You can create a CGPDFContext and draw into it using Core Graphics commands (like CGPath stuff).

Answer 2

I used the Tipp of user1118321 and searched in the Core Graphics.
Sadly it still took me a lot of time and somehow i can not add an existing path to the context ... somehow i can't get it stroked.
In my case this is no problem, since i want to draw a new one. Core Graphics does offer functions similar to CGPaths drawing functions in CGContext.
This is my code i use to create a pdf file and draw a new path in it:
-(void) createPDFwithSize:(CGRect) size andFilename: (const char *) filename;
{
CGContextRef pdfContext;
CFStringRef path;
CFURLRef url;
CFDataRef boxData = NULL;
CFMutableDictionaryRef myDictionary = NULL;
CFMutableDictionaryRef pageDictionary = NULL;
path = CFStringCreateWithCString (NULL, filename, kCFStringEncodingUTF8);
url = CFURLCreateWithFileSystemPath (NULL, path, kCFURLPOSIXPathStyle, 0);
CFRelease (path);
myDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(myDictionary, kCGPDFContextTitle, CFSTR("My PDF File"));
CFDictionarySetValue(myDictionary, kCGPDFContextCreator, CFSTR("My Name"));
pdfContext = CGPDFContextCreateWithURL (url, &size, myDictionary);
CFRelease(myDictionary);
CFRelease(url);
pageDictionary = CFDictionaryCreateMutable(NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
boxData = CFDataCreate(NULL,(const UInt8 *)&size, sizeof (CGRect));
CFDictionarySetValue(pageDictionary, kCGPDFContextMediaBox, boxData);
CGPDFContextBeginPage (pdfContext, pageDictionary);
// -----------------------------------------------------------------------------------------------------------------
// Draw stuff ...
CGContextSetLineWidth(pdfContext, 1);
CGContextSetStrokeColorWithColor(pdfContext, CGColorCreateGenericRGB(0, 0, 0, 1));
CGContextBeginPath(pdfContext);
CGContextMoveToPoint(pdfContext, 100, 100);
CGContextAddLineToPoint(pdfContext, 100, 150);
CGContextAddLineToPoint(pdfContext, 125, 175);
CGContextAddLineToPoint(pdfContext, 150, 150);
CGContextAddLineToPoint(pdfContext, 150, 100);
CGContextAddLineToPoint(pdfContext, 100, 150);
CGContextAddLineToPoint(pdfContext, 150, 150);
CGContextAddLineToPoint(pdfContext, 100, 100);
CGContextAddLineToPoint(pdfContext, 150, 100);
CGContextStrokePath(pdfContext); // don't forget this
CGContextClosePath(pdfContext);
// -----------------------------------------------------------------------------------------------------------------
CGPDFContextEndPage (pdfContext);
CGContextRelease (pdfContext);
CFRelease(pageDictionary);
CFRelease(boxData);
}