Draw C4Shape to PDF

C4WorkSpace.m

//
//  C4WorkSpace.m
//  drawShapesToImage
//
//  Created by moi on 12-09-27.
//  Copyright (c) 2012 moi. All rights reserved.
//

#import "C4WorkSpace.h"

@implementation C4WorkSpace {
    C4Shape *s;
    CGContextRef context;
}

-(void)setup {
    CGPoint pts[2] = {CGPointZero,CGPointMake(100, 100)};
    s = [C4Shape line:pts];
    [self.canvas addShape:s];
    [self runMethod:@"createAndDrawToPDF" afterDelay:0.1];
}

-(void)touchesBegan {
    [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];
    
    C4Log(@"PDF Context created");
    CGContextBeginPage (pdfContext,nil);
    
    //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) {
        for(int i = 0; i < 10; i++) {
            CGPoint orig = c.frame.origin;
            orig.y += i*10;
            CGContextTranslateCTM(pdfContext, orig.x, orig.y);
            [c.layer renderInContext:pdfContext];
            CGContextTranslateCTM(pdfContext, -1*orig.x, -1*orig.y);
        }
    }
    
    CGContextEndPage (pdfContext);
    CGContextRelease (pdfContext);
}

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