[IOS] parses XML using nsxmlparser

1. Start nsxmlparser

To use nsxmlparser, you must first create it and set various attributes. The following methods are used:

Initwithcontentsofurl creates a parser through nsurl

InitwithdataCreate a parser through nsdata, for example, xmlpaser = [[nsxmlparse alloc] initwithdata: webdata];

SetdelegateDefine a delegate for the parser

ParseRun the parser

2. Act as delegate

The five most important methods:

//Element start character foundProcessing functions
(That is, the beginning of the report element and the attributes of the element)

Method 1.-(Void) parser :( nsxmlparser *) parser

　　　　　　　　Didstartelement:( Nsstring *) elementname

Namespaceuri :( nsstring *) namespaceuri

Qualifiedname :( nsstring *) QNAME

Attributes :( nsdictionary *) attributedict

Method 2 .//Processing tag contains content characters
(All or part of the report element)

-(Void) parser :( nsxmlparser *)Parser foundcharacters:( Nsstring *) String

Method 3. // discover elementsHandler Of The TerminatorTo save the data of each element Project (that is, the end mark of the report element)

-(Void) parser :( nsxmlparser *) parser

　　　　　　　　Didendelement:( Nsstring *) elementname

Namespaceuri :( nsstring *) namespaceuri

Qualifiedname :( nsstring *) QNAME

Method 4. // reportResolution end

-(Void)Parserdidenddocument:( Nsxmlparser *) parser

Method 5. // report unrecoverable parsing errors

-(Void) paser: parsererroccured