Merge 2 pdf files in iOS

Question

I am trying to merge two PDF files in iOS. I am merging page-by-page. It takes a lot of time in case of very big files. Is there any way, we can just merge the two files,

Answer 1

Use this method for any number of pdfs this may help u

+ (NSString *)joinPDF:(NSArray *)listOfPath{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *layOutPath=[NSString stringWithFormat:@"%@/mergepdf/pdf",[paths objectAtIndex:0]];
    if(![[NSFileManager defaultManager] fileExistsAtPath:layOutPath]){
        [[NSFileManager defaultManager] createDirectoryAtPath:layOutPath withIntermediateDirectories:YES attributes:nil error:nil];        
    } 
    // File paths
    NSString *fileName = @"ALL.pdf";
    NSString *pdfPathOutput = [layOutPath stringByAppendingPathComponent:fileName];
    CFURLRef pdfURLOutput = (__bridge CFURLRef)[NSURL fileURLWithPath:pdfPathOutput];
    NSInteger numberOfPages = 0;
    // Create the output context
    CGContextRef writeContext = CGPDFContextCreateWithURL(pdfURLOutput, NULL, NULL);

    for (NSString *source in listOfPath) {
//        CFURLRef pdfURL = (__bridge CFURLRef)[NSURL fileURLWithPath:source];

       CFURLRef pdfURL =  CFURLCreateFromFileSystemRepresentation(NULL, [source UTF8String],[source length], NO);

        //file ref
        CGPDFDocumentRef pdfRef = CGPDFDocumentCreateWithURL(pdfURL);
        numberOfPages = CGPDFDocumentGetNumberOfPages(pdfRef);

        // Loop variables
        CGPDFPageRef page;
        CGRect mediaBox;

        // Read the first PDF and generate the output pages
        DLog(@"GENERATING PAGES FROM PDF 1 (%@)...", source);
        for (int i=1; i<=numberOfPages; i++) {
            page = CGPDFDocumentGetPage(pdfRef, i);
            mediaBox = CGPDFPageGetBoxRect(page, kCGPDFMediaBox);
            CGContextBeginPage(writeContext, &mediaBox);
            CGContextDrawPDFPage(writeContext, page);
            CGContextEndPage(writeContext);
        }

        CGPDFDocumentRelease(pdfRef);
        CFRelease(pdfURL);
    }
  // CFRelease(pdfURLOutput);
//    
//    // Finalize the output file
   CGPDFContextClose(writeContext);
    CGContextRelease(writeContext);

    return pdfPathOutput;
}