iOS TBXML的使用

<?xml version="1.0"?>
<authors>
    <author name="J.K. Rowling">
        <book title="Harry Potter and the Philosopher‘s Stone" price="119.99">
            <description>
                Harry potter thinks he is an ordinary boy - until he is rescued from a beetle-eyed giant of a man, enrolls at Hogwarts School of Witchcraft and Wizardry, learns to play quidditch and does battle in a deadly duel.
            </description>
        </book>
        <book title="Harry Potter and the Chamber of Secrets" price="8.99">
            <description>
                When the Chamber of Secrets is opened again at the Hogwarts School for Witchcraft and Wizardry, second-year student Harry Potter finds himself in danger from a dark power that has once more been released on the school.
            </description>
        </book>
    </author>
    <author name="Douglas Adams">
        <book title="The Hitchhiker‘s Guide to the Galaxy" price="15.49">
            <description>
                Join Douglas Adams‘s hapless hero Arthur Dent as he travels the galaxy with his intrepid pal Ford Prefect, getting into horrible messes and generally wreaking hilarious havoc.
            </description>
        </book>
        <book title="The Restaurant at the End of the Universe " price="14.36">
            <description>
                Arthur and Ford, having survived the destruction of Earth by surreptitiously hitching a ride on a Vogon constructor ship, have been kicked off that ship by its commander. Now they find themselves aboard a stolen Improbability Drive ship commanded by Beeblebrox, ex-president of the Imperial Galactic Government and full-time thief.
            </description>
        </book>
    </author>
</authors>

typedef struct _TBXMLElement {
char * name;
char * text;
TBXMLAttribute * firstAttribute;
struct _TBXMLElement * parentElement;
struct _TBXMLElement * firstChild;
struct _TBXMLElement * currentChild;
struct _TBXMLElement * nextSibling;
struct _TBXMLElement * previousSibling;
} TBXMLElement;

typedef struct _TBXMLAttribute {
char * name;
char * value;
struct _TBXMLAttribute * next;
} TBXMLAttribute;

TBXML *tbxml = [[TBXML alloc] initWithXMLFile:@"books.xml"];
TBXML *tbxml = [[TBXML alloc] initWithXMLFile:@"books" fileExtension:@"xml"];
TBXML *tbxml = [[TBXML alloc] initWithXMLString:xmlString];
TBXML *tbxml = [[TBXML alloc] initWithXMLData:xmlData];