PDFView.h

/*
 
  Copyright (c) 2009 Nathan de Vries

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be
  included in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

#import <UIKit/UIKit.h>


@interface PDFView : UIView {
  CGPDFDocumentRef pdf;
}

@property(nonatomic, assign) CGPDFDocumentRef pdf;

- (id)initWithFrame:(CGRect)frame andContentsOfFile:(NSString *)path;

@end

PDFView.m

/*
 
 Copyright (c) 2009 Nathan de Vries
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
 "Software"), to deal in the Software without restriction, including
 without limitation the rights to use, copy, modify, merge, publish,
 distribute, sublicense, and/or sell copies of the Software, and to
 permit persons to whom the Software is furnished to do so, subject to
 the following conditions:
 
 The above copyright notice and this permission notice shall be
 included in all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 */

#import "PDFView.h"


@implementation PDFView


@synthesize pdf;


- (id)initWithFrame:(CGRect)frame andContentsOfFile:(NSString *)path {
  if (self = [self initWithFrame:frame]) {
    self.backgroundColor = [UIColor clearColor];
    self.clearsContextBeforeDrawing = YES;
    self.pdf = CGPDFDocumentCreateWithURL((CFURLRef)[NSURL fileURLWithPath:path]);
  }
  return self;
}


- (void)drawRect:(CGRect)rect {
  CGContextRef context = UIGraphicsGetCurrentContext();
  
	CGContextTranslateCTM(context, 0.0, rect.size.height);
	CGContextScaleCTM(context, 1.0, -1.0);
	CGContextSaveGState(context);
  
  CGPDFPageRef page = CGPDFDocumentGetPage(pdf, 1);

  CGAffineTransform pdfTransform = CGPDFPageGetDrawingTransform(page, kCGPDFTrimBox, rect, 0, YES);
	CGContextConcatCTM(context, pdfTransform);
  
	CGContextDrawPDFPage(context, page);
	CGContextRestoreGState(context);
  CGPDFPageRelease(page);
}


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


- (void)dealloc {
  CGPDFDocumentRelease(pdf);
  [super dealloc];
}


@end