Web service and XML data parsing for iOS Development Network chapter

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Use Web service to get the most common form of server data in communication between iphone and back-office systems.

In the Web service communication. Data interchange formats typically use XML data, and XML data is a common form of software development.

Therefore, XML parsing is also a basic skill that must be mastered in project development.

This article provides an XML data parsing class Simplexmlparser,

The characteristics of this class will parse the XML data into a database record form, and the data is parsed and saved in Nsarray.

Each element of the array corresponds to a database record, and each record is a nsdictionary consisting of database fields and values.

1. Interface definition

@interface simplexmlparser:nsobject{nsstring *currentpropertyname; Nsmutablestring *currentdata; BOOL Contenterror; NSString *faultname; NSString *faultname2; Nsmutabledata *webdata; Nsmutablearray *themainstack; Nsmutablearray *currentdatastack; Nsxmlparser *parser; NSString *recordhead; Nsinteger Sectioncount; BOOL Beginrecord; Nsmutablestring *currentcharacters; Nsmutabledictionary *parsedresponsedictionary; NSString *parseelementpath;} -(ID) init;-(void) InitData: (Nsmutabledata *) data;-(void) Parse: (nsstring*) head;-(BOOL) iscontentfault;-(Nsinteger) getrecordcount;-(nsdictionary*) Getrecordatindex: (Nsinteger) idx;-(nsmutablearray*) getrecordlists;

2. Use

Nsmutabledata *webdata; Simplexmlparser *thisparser = [[Simplexmlparser alloc] initwithdata:webdata]; NSString *recordhead  = @ "User"; [ Thisparser Parse:recordhead];

The parsed database record is saved in the Recordstack variable of the parser object, first getting the number of record bars, and then traversing each record.

Nsinteger i = 0, nresult = [Thisparser getrecordcount];for (i = 0; i < Nresult; i++) {nsdictionary *recorddict = [ThisPar Ser getrecordatindex:i]; Nsdictionary *tempdic = [recorddict objectforkey:@ "Tempdic"]; NSString *value = [Tempdic objectforkey:@ "value"];}

Simplexmlparser class : click I download

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Parsing Web service and XML data for the iOS Development Network article