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< iOS samples

Search & Replace PDF Text or Images in Obj-C

Sample Obj-C code to use PDFTron SDK for searching and replacing text strings and images inside existing PDF files (e.g. business cards and other PDF templates). Unlike PDF forms, the ContentReplacer works on actual PDF content and is not limited to static rectangular annotation regions. Learn more about our PDF Editing & Manipulation Library.

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Step 2: Add the code:

//---------------------------------------------------------------------------------------
// Copyright (c) 2001-2018 by PDFTron Systems Inc. All Rights Reserved.
// Consult legal.txt regarding legal and license information.
//---------------------------------------------------------------------------------------

#import <OBJC/PDFNetOBJC.h>
#import <Foundation/Foundation.h>

//-----------------------------------------------------------------------------------------
// The sample code illustrates how to use the ContentReplacer class to make using 
// 'template' pdf documents easier.
//-----------------------------------------------------------------------------------------

int main(int argc, char *argv[])
{
    @autoreleasepool {

        NSString* input_path = @"../../TestFiles/";
        NSString* output_path = @"../../TestFiles/Output/";
        
        int ret = 0;
        [PTPDFNet Initialize: 0];

        // The following example illustrates how to replace an image in a certain region,
        // and how to change template text.
        @try  
        {
            PTPDFDoc *doc = [[PTPDFDoc alloc] initWithFilepath: [input_path stringByAppendingPathComponent: @"BusinessCardTemplate.pdf"]];
            [doc InitSecurityHandler];
            
            // first, replace the image on the first page
            PTContentReplacer *replacer = [[PTContentReplacer alloc] init];
            PTPage *page = [doc GetPage: 1];
            PTImage *img = [PTImage Create: [doc GetSDFDoc] filename: [input_path stringByAppendingPathComponent: @"peppers.jpg"]];
            [replacer AddImage: [page GetMediaBox] replacement_image: [img GetSDFObj]];
            // next, replace the text place holders on the second page
            [replacer AddString: @"NAME" replacement_text: @"John Smith"];
            [replacer AddString: @"QUALIFICATIONS" replacement_text: @"Philosophy Doctor"]; 
            [replacer AddString: @"JOB_TITLE" replacement_text: @"Software Developer"]; 
            [replacer AddString: @"ADDRESS_LINE1" replacement_text: @"#100 123 Software Rd"]; 
            [replacer AddString: @"ADDRESS_LINE2" replacement_text: @"Vancouver, BC"]; 
            [replacer AddString: @"PHONE_OFFICE" replacement_text: @"604-730-8989"]; 
            [replacer AddString: @"PHONE_MOBILE" replacement_text: @"604-765-4321"]; 
            [replacer AddString: @"EMAIL" replacement_text: @"info@pdftron.com"]; 
            [replacer AddString: @"WEBSITE_URL" replacement_text: @"http://www.pdftron.com"]; 
            // finally, apply
            [replacer Process: page];

            [doc SaveToFile: [output_path stringByAppendingPathComponent: @"BusinessCard.pdf"] flags: 0];
            NSLog(@"Done. Result saved in BusinessCard.pdf");
        }
        @catch(NSException *e)
        {
            NSLog(@"%@", e.reason);
            ret = 1;
        }
        
        // The following example illustrates how to replace text in a given region
        @try  
        {
            // Open the document that was saved in the previous code sample
            PTPDFDoc *doc = [[PTPDFDoc alloc] initWithFilepath: [input_path stringByAppendingPathComponent: @"newsletter.pdf"]];
            [doc InitSecurityHandler];
            
            PTContentReplacer *replacer = [[PTContentReplacer alloc] init];
            PTPage *page = [doc GetPage: 1];
            PTPDFRect * target_region = [page GetMediaBox];
            [replacer AddText: target_region replacement_text: @"hello hello hello hello hello hello hello hello hello hello"];
            [replacer Process: page];

            [doc SaveToFile: [output_path stringByAppendingPathComponent: @"ContentReplaced.pdf"] flags: 0];

            NSLog(@"Done. Result saved in ContentReplaced.pdf");
        }
        @catch(NSException *e)
        {
            NSLog(@"%@", e.reason);
            ret = 1;
        }
        NSLog(@"Done.");
        
        return ret;
    }
	
}