NSXMLParse 解析 soap消息
要使用NSXMLParser要先创建它，设置各种属性，主要用到以下几个方法：
initWithContentsOfURL 通过NSURL创建解析器
initWithData 通过NSData创建解析器， 例如：xmlPaser =[[NSXMLParse alloc] initWithData: webData];
setDelegate 为解析器定义委托
parse 运行解析器
2. 充当委托
最重要的5个方法：
//发现元素开始符的处理函数 （即报告元素的开始以及元素的属性）
方法1. - (void)parser:(NSXMLParser *)parser
didStartElement:(NSString*)elementName
namespaceURI:(NSString*)namespaceURI
qualifiedName:(NSString *)qName
attributes:(NSDictionary*)attributeDict
方法2. //处理标签包含内容字符 （报告元素的所有或部分内容）
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString*)string
方法3.//发现元素结束符的处理函数，保存元素各项目数据（即报告元素的结束标记）
- (void)parser:(NSXMLParser *)parser
didEndElement:(NSString*)elementName
namespaceURI:(NSString*)namespaceURI
qualifiedName:(NSString *)qName
方法4.//报告解析的结束
- (void)parserDidEndDocument:(NSXMLParser*)parser
方法 5.//报告不可恢复的解析错误
- (void)paser:parserErrorOccured
-
下面详细举例
1.申明了一个xml处理协议，用到NSXMLParser协议，用来具体处理我们要解析的xml文件，把需要的url取出来，存到指定的data里。
*/
//多线程处理类的定义，方法实现，与向主线程回传data
@classAppRecord;
//@protocol ParseOperationDelegate;
@protocol ParseOperationDelegate
- (void)didFinishParsing:(NSArray *)appList;
- (void)parseErrorOccurred:(NSError *)error;
@end
@interface ParseOperation : NSOperation<NSXMLParserDelegate> {
@private id <ParseOperationDelegate> delegate;//,NSXMLParserDelegate
NSData *dataToParse;
NSMutableArray *workingArray;
AppRecord *workingEntry;
NSMutableString *workingPropertyString;
NSArray*elementsToParse;
BOOLstoringCharacterData;
}
- (id)initWithData:(NSData *)datadelegate:(id <ParseOperationDelegate>)theDelegate;
@end
然后完成协议的初始化函数
- (id)initWithData:(NSData *)datadelegate:(id <ParseOperationDelegate>)theDelegate
{
self =[super init];
if(self != nil)
{
self.dataToParse =data;
self.delegate =theDelegate;
self.elementsToParse= [NSArrayarrayWithObjects:kIDStr, kNameStr, kImageStr,kArtistStr, nil];
}
return self;
}
2.完成对特定标签的解析
#pragma mark -
#pragma mark RSS processing
- (void)parser:(NSXMLParser*)parser didStartElement:(NSString*)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
attributes:(NSDictionary *)attributeDict
{
// entry: { id (link), im:name (app name), im:image(variable height) }
//
if([elementName isEqualToString:kEntryStr])
{
self.workingEntry =[[[AppRecord alloc] init] autorelease];
}
storingCharacterData = [elementsToParse containsObject:elementName];
}
3.找到具体的地址与内容，并存储
- (void)parser:(NSXMLParser*)parser didEndElement:(NSString*)elementName
namespaceURI:(NSString *)namespaceURI
qualifiedName:(NSString *)qName
{
if(self.workingEntry)
{
if(storingCharacterData)
{
NSString*trimmedString = [workingPropertyStringstringByTrimmingCharactersInSet:
[NSCharacterSet whitespaceAndNewlineCharacterSet]];
[workingPropertyStringsetString:@""]; // clear the string for next time
if([elementName isEqualToString:kIDStr])
{
self.workingEntry.appURLString = trimmedString;
}
elseif ([elementName isEqualToString:kNameStr])
{
self.workingEntry.appName = trimmedString;
}
elseif ([elementName isEqualToString:kImageStr])
{
self.workingEntry.imageURLString = trimmedString;
}
elseif ([elementName isEqualToString:kArtistStr])
{
self.workingEntry.artist = trimmedString;
}
}
elseif ([elementName isEqualToString:kEntryStr])
{
[self.workingArray addObject:self.workingEntry];
self.workingEntry =nil;
}
}
}
- (void)parser:(NSXMLParser*)parser foundCharacters:(NSString*)string
{
if(storingCharacterData)
{
[workingPropertyString appendString:string];
}
}