问在Mailer中预览PDF

EN

    //wrap all PDF files together into one PDF file
    //*************************************************************


    NSArray     *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString    *documentsDirectory = [paths objectAtIndex:0];

    NSString    *oldFilePath=[documentsDirectory stringByAppendingPathComponent:@"myPDF.pdf"];
    NSURL       *oldFileUrl = [NSURL fileURLWithPath:oldFilePath];

    CGContextRef context = CGPDFContextCreateWithURL((__bridge_retained CFURLRef)oldFileUrl, NULL, NULL);


    for (OBJreport in pages)
    {

        // Get the first page from each source document
        NSString            *pdfPath        = OBJreport.rep_filePath;
        NSURL               *pdfUrl         = [NSURL fileURLWithPath:pdfPath];
        CGPDFDocumentRef    pdfDoc          = CGPDFDocumentCreateWithURL((__bridge_retained CFURLRef)pdfUrl);
        CGPDFPageRef        pdfPage         = CGPDFDocumentGetPage(pdfDoc, 1);
        CGRect              pdfCropBoxRect  = CGPDFPageGetBoxRect(pdfPage, kCGPDFMediaBox);

        // Copy the page to the new document
        CGContextBeginPage(context, &pdfCropBoxRect);
        CGContextDrawPDFPage(context, pdfPage);

        // Close the source files
        CGContextEndPage(context);
        CGPDFDocumentRelease(pdfDoc);
    }


    // Cleanup
    //*************************************************************
    CGContextRelease(context);


    //add the final output file to the pages array for cleanup
    //*************************************************************
    OBJ_report *cleanUpOBJreport = [OBJ_report new];


    cleanUpOBJreport.rep_filePath   = [oldFileUrl path];
    cleanUpOBJreport.rep_mimiType   = @"application/pdf";
    cleanUpOBJreport.rep_data       = [NSData dataWithContentsOfURL:oldFileUrl];
    cleanUpOBJreport.rep_fileName   = @"myPDF.pdf";

    [pages addObject:cleanUpOBJreport];




    //mail
    //*************************************************************

    MFMailComposeViewController *mailer = [[MFMailComposeViewController alloc] init];

    [mailer setMailComposeDelegate:self];
    [mailer setSubject:@"File Attached"];
    [mailer setMessageBody:defaultEmailCoverLetter isHTML:NO];

    //add all pages
    [mailer addAttachmentData:cleanUpOBJreport.rep_data mimeType:@"application/pdf" fileName:@"myPDF.pdf"];
    [self presentViewController:mailer animated:YES completion:nil];


    //cleanup files
    //*************************************************************
    OBJ_report *clean_OBJreport = [OBJ_report new];
    for (clean_OBJreport in pages)
    {
        NSError *error = nil;
        [[NSFileManager defaultManager] removeItemAtPath:clean_OBJreport.rep_filePath error:&error];
    }