Web Service and XML data parsing in iOS Development Network

Web Service and XML data parsing in iOS Development Network

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In the communication between the iPhone and the background system, the most common form of obtaining server data using Web Service.

In Web Service communication, XML data is usually used in data exchange formats. XML data is also a common format in software development,

Therefore, XML parsing becomes a basic skill in project development.

This article provides an XML data parsing class SimpleXMLParser,

This type of feature parses XML data into a database record, 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 records are saved in the recordStack variable of the Parser object. The number of records is obtained first, and each record is traversed.

NSInteger i = 0, nResult = [thisParser getRecordCount];for(i = 0; i < nResult; i++){NSDictionary *recordDict = [thisParser getRecordAtIndex:i];NSDictionary *tempDic = [recordDict objectForKey:@"tempDic"];NSString *value = [tempDic objectForKey:@"value"];}

SimpleXMLParser class: Click to download

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