(Objective-C) Update an XML Attribute

Demonstrates how to update XML attributes.

The output XML is this:

<abc b="pear" c="orange" a="130">Test</abc>

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#import <CkoXml.h>

CkoXml *xml = [[CkoXml alloc] init];

BOOL success = [xml LoadXml: @"<abc a=\"123\" b=\"apple\">Test</abc>"];

// The UpdateAttribute and AddOrUpdateAttribute methods
// are identical.  Both will replace the attribute's value if it
// already exists, or insert a new attribute if it does not yet exist.

// Change the value of attribute "b" to "pear".
success = [xml UpdateAttribute: @"b" attrValue: @"pear"];

// Because no attribute named "c" exists, UpdateAttribute
// will create it:
success = [xml UpdateAttribute: @"c" attrValue: @"orange"];

// If an attribute's value is an integer, the AddToAttribute
// method may be called to update it by adding an integer value.
// For example, update the value of "a" to "130" by adding 7.
[xml AddToAttribute: @"a" amount: [NSNumber numberWithInt: 7]];

// Examine the result:
NSLog(@"%@",[xml GetXml]);