XML请求数据和解析

对JSON习以为常之后，使用XML多少有点不习惯。其实二者差不多。这里讲述一下iOS自带的NSXMLParserDelegate的使用。

1.头文件中声名协议<NSXMLParserDelegate>，定义两个方法：-(void)postRequest 和 -(void)startParser:(NSData*)_data

2.源文件中实现，代码如下：

[objc]view plaincopyprint? 
   
 -(void)postRequest
 {
 //preparrequest
 NSString*urlString=[NSStringstringWithFormat:@"http://122.113.26.11/golive/api/loadRegionList.do"];
 NSMutableURLRequest*request=[[NSMutableURLRequestalloc]init];
 [requestsetURL:[NSURLURLWithString:urlString]];
 [requestsetHTTPMethod:@"POST"];
 
//setheaders设置contentType和HTTPHeaderField
NSString*contentType=[NSStringstringWithFormat:@"text/xml"];
addValue:contentTypeforHTTPHeaderField:@"Content-Type"];
//createthebody在此处拼接XML字段，将每段尖括号的内容拆开拼接起来
NSMutableData*postBody=[NSMutableDatadata];
//[postBodyappendData:[[NSStringstringWithFormat:@"<xml>"]dataUsingEncoding:NSUTF8StringEncoding]];
 [postBodyappendData:[[NSStringstringWithFormat:@"<?xmlversion=\"1.0\"encoding=\"utf-8\"?>"]dataUsingEncoding:NSUTF8StringEncoding]];
 [postBodystringWithFormat:@"<requestwebsite=\"http://XXXXXXXXXXXXXX\">"]dataUsingEncoding:NSUTF8StringEncoding]];
stringWithFormat:@"<devicedevmodel=\"\"dnum=\"\"didtoken=\"\"dver=\"\"/>"]stringWithFormat:@"<livemac=\"XXXXX\"deviceid=\"\"livetoken=\"\"livever=\"\"/>"]dataUsingEncoding:NSUTF8StringEncoding]];
stringWithFormat:@"</parameter>"]stringWithFormat:@"</request>"]//post
setHTTPBody:postBody];
 
 //getresponse
 NSHTTPURLResponse*urlResponse=nil;
NSError*error=[[NSErrorinit];
self.responseData=[NSURLConnectionsendSynchronousRequest:requestreturningResponse:&urlResponseerror:&error];
NSString*result=[[NSStringinitWithData:responseDataencoding:NSUTF8StringEncoding];
 NSLog(@"regionResponseCode:%ld",(long)[urlResponsestatusCode]);
if([urlResponsestatusCode]>=200&&[urlResponsestatusCode]<300){
 NSLog(@"regionResponse:%@",result);
//这里获取到服务器返回的内容
 }
 NSString*aStr;
 aStr=[[NSStringinitWithData:postBodyencoding:NSASCIIStringEncoding];
 NSLog(@"reg==========%@",aStr);
 }
//自定义一个PraxMovie方法，参数时NSDate型的数据，用来传递接受到的数据
 -(void)startParser:(NSData*)data
 {
//NSXMLParser解析xml格式的数据，在这里初始化，并赋值
 NSXMLParser*parser=[[NSXMLParseralloc]initWithData:data];
 parser.delegate=self;
 [parserparse];
 NSLog(@"解析完成。。。");
//文档出错的时候触发
void)parser:(NSXMLParser*)parserparseErrorOccurred:(NSError*)parseError
 NSLog(@"%@",parseError);
//遇到一个开始标签时候触发
didStartElement:(NSString*)elementName
 namespaceURI:(NSString*)namespaceURI
 qualifiedName:(NSString*)qualifiedName
attributes:(NSDictionary*)attributeDict
self.currentTagName=elementName;
//region是需要解析的内容所对应的字段
if([currentTagNameisEqualToString:@"region"]){
//name和code是需要解析的内容所对应的字段
 [self.nameaddObject:[attributeDictobjectForKey:@"name"]];
 [self.codeobjectForKey:@"code"]];
self.regionDicsetObject:[attributeDictobjectForKey:@"code"]forKey:[attributeDict NSLog(@"language:%@;code:%@",[attributeDictobjectForKey:@"name"],0); background-color:inherit">objectForKey:@"code"]);
//遇到结束标签时候出发
 -(didEndElement:(NSString*)elementName
NSString*)namespaceURI
NSString*)qName;
self.currentTagName= }

这样就OK了，成功获取到后台数据并解析成所需要的内容。原文链接：https://www.f2er.com/xml/297872.html

XML请求数据和解析

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