创建pdf页面，其中包含多个pdf页面

Question

是否有可能创建一个页面，其中包含其他PDF页面从源pdf中的PDF。 我喜欢使用CGContextDrawPDFPage与指定的CGRect - 像UUImage的方法drawInRect。

Answer 1

CGPDFDocumentRef PDFfile; 
CFURLRef pdfURL = CFBundleCopyResourceURL(CFBundleGetMainBundle(), CFSTR("iPhoneAppProgrammingGuide.pdf"), NULL, NULL); 
     PDFfile = CGPDFDocumentCreateWithURL((CFURLRef)pdfURL); 
     CFRelease(pdfURL); 


-(void)drawRect:(CGRect)rect 
{ 
    { 
     totalpagenumpers=CGPDFDocumentGetNumberOfPages(PDFfile); 
    navBar.title = [NSString stringWithFormat:@"(%d/%d)",currentpage,totalpagenumpers]; 
    CGPDFPageRef page = CGPDFDocumentGetPage(PDFfile,currentpage); 
    context = UIGraphicsGetCurrentContext(); 
    CGContextSaveGState(context); 
    CGContextSetRGBFillColor(context, 1.0, 1.0, 1.0, 1.0); 
    CGContextFillRect(context,self.bounds); 
    CGContextTranslateCTM(context, -1.0, [self bounds].size.height); 
    CGContextScaleCTM(context, 1.0, -1.0); 
    CGContextConcatCTM(context, CGPDFPageGetDrawingTransform(page, kCGPDFArtBox, [self bounds], 0, true)); 
    CGContextDrawPDFPage(context, page);  
    CGContextRestoreGState(context); 
    CGAffineTransform transform = aspectFit(CGPDFPageGetBoxRect(page, kCGPDFMediaBox), 
               CGContextGetClipBoundingBox(context)); 
      CGContextConcatCTM(context, transform); 
     UIGraphicsBeginImageContext(CGSizeMake(self.bounds.size.width, self.bounds.size.height)); 

    } 



} 




-(void)Next 
{ 
     size_t pageCount = CGPDFDocumentGetNumberOfPages(PDFfile); 
    if (currentpage == pageCount) 
    { 
     NSLog(@"aaaaa"); 
    } 
    else 
    { 


     [UIView beginAnimations:nil context:NULL]; 
     [UIView setAnimationDuration:1.0]; 
     [UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self cache:YES]; 
     [UIView commitAnimations]; 

     currentpage++; 

     [self setNeedsDisplay]; 
    } 

} 

-(void)Previous 
{ 

    if (currentpage == 1||currentpage<1) 
    { 
     { 
      NSLog(@"11111"); 

     } 

    } 
    else 
    {   

     [UIView beginAnimations:nil context:NULL]; 
     [UIView setAnimationDuration:1.0]; 
     [UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self cache:YES]; 
     // self.modalTransitionStyle = UIModalTransitionStylePartialCurl; 

     [UIView commitAnimations]; 
     currentpage--; 
     [self setNeedsDisplay]; 
    } 
}