(Objective-C) Add XMP MetaData to JPG or TIFF

Demonstrates how to add XMP metadata to a JPG or TIFF image that doesn't already have XMP metadata.

Chilkat Objective-C Library Downloads MAC OS X (Cocoa) Libs iOS Libs

#import <CkoXmp.h>
#import <CkoXml.h>

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

CkoXmp *xmp = [[CkoXmp alloc] init];

CkoXml *xml = 0;

// The first step is to create a new XMP document, which is nothing
// more than XML.  The NewXmp method returns an XML document with
// the standard XMP boilerplate.  
xml = [xmp NewXmp];

// Add some properties...
BOOL success = [xmp AddSimpleStr: xml propName: @"Iptc4xmpCore:Chilkat" propVal: @"Blah blah"];
// If you wish to view the XML, save it to a file and review it
// with a text editor:
success = [xml SaveXml: @"newXmp.xml"];
if (success != YES) {
    NSLog(@"%@",xml.LastErrorText);
    return;
}

// To add the XMP to the JPG (or TIFF), simply load the JPG,
// append the XMP, and save:
success = [xmp LoadAppFile: @"scream.jpg"];
if (success != YES) {
    NSLog(@"%@",xmp.LastErrorText);
    return;
}

success = [xmp Append: xml];
if (success != YES) {
    NSLog(@"%@",xmp.LastErrorText);
    return;
}

success = [xmp SaveAppFile: @"screamOut.jpg"];
if (success != YES) {
    NSLog(@"%@",xmp.LastErrorText);
    return;
}