Create PDF in iOS

C4WorkSpace.m

//
//  C4WorkSpace.m
//  createPDF
//
//  Created by Travis Kirton on 12-05-17.
//  Copyright (c) 2012 POSTFL. All rights reserved.
//

#import "C4WorkSpace.h"

@interface C4WorkSpace ()
-(void)createAndDrawToPDF;
-(CGContextRef) createPDFContext:(CGRect)inMediaBox path:(CFStringRef) path;
@end

@implementation C4WorkSpace

-(void)setup {
    C4Shape *s = [C4Shape ellipse:CGRectMake(100, 0, 100, 100)];
    s.origin = s.frame.origin;
    [self.canvas addShape:s];
    
    CGPoint p[2]  = {CGPointMake(100, 100),CGPointMake(400, 400)};
    C4Shape *l = [C4Shape line:p];
    l.origin = l.frame.origin;
    [self.canvas addShape:l];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    [self createAndDrawToPDF];
}

-(void)createAndDrawToPDF {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:@"tmp.pdf"];
    
    CGContextRef pdfContext = [self createPDFContext:self.canvas.frame path:(CFStringRef)writableDBPath];
    
    NSLog(@"PDF Context created");
    CGContextBeginPage (pdfContext,nil); // 6
    
    //turn PDF upsidedown
    CGAffineTransform transform = CGAffineTransformIdentity;
    transform = CGAffineTransformMakeTranslation(0, self.canvas.frame.size.height);
    transform = CGAffineTransformScale(transform, 1.0, -1.0);
    CGContextConcatCTM(pdfContext, transform);

    //Draw view into PDF
    for(C4Shape *c in self.canvas.subviews) {
        if(c.isLine) {
            
        }
        CGPoint orig = c.frame.origin;
        CGContextTranslateCTM(pdfContext, orig.x, orig.y);
        [c.layer renderInContext:pdfContext];
        CGContextTranslateCTM(pdfContext, -1*orig.x, -1*orig.y);
    }

    CGContextEndPage (pdfContext);// 8
    CGContextRelease (pdfContext);
}

-(CGContextRef) createPDFContext:(CGRect)inMediaBox path:(CFStringRef) path
{
    CGContextRef myOutContext = NULL;
    CFURLRef url;
	
    url = CFURLCreateWithFileSystemPath (NULL, // 1
                                         path,
                                         kCFURLPOSIXPathStyle,
                                         false);
    if (url != NULL) {
        myOutContext = CGPDFContextCreateWithURL (url,// 2
                                                  &inMediaBox,
                                                  NULL);
        CFRelease(url);// 3
    }
    return myOutContext;// 4
}

@end