iOS解析整个XML元素

Question

我知道有关XML的问题在这里已经回答了数百万次，但是我找不到适合我的任何答案。这是我的问题，欢迎任何帮助！

阅读我的服务器从一个PHP脚本一个XML文件，并将其发送到NSXMLParser后，我无法找到一个办法让在XML称为“名称”的所有元素，才能在我的应用程序后以填充UITableView。我的目标是读取整个XML文件，获取名为“name”的所有元素并将它们存储在NSMutableArray中以填充表视图。

因此，这里是通过调用一个PHP脚本传递到NSXMLParser XML代码：

<?xml version="1.0" encoding="ISO-8859-1"?><?xml-stylesheet type="text/xsl" href="auctions_xsl.xsl"?><auctions> 
<auction> 
    <id>1</id> 
    <name>Leilão Tijuca</name> 
    <description>Casa de vila, ótimo estado e ótima localização. Leiloeiro responsável: Fulano de Tal. Contato pelo telefone 3554-5555</description> 
    <date>2012-03-06</date> 
    <imagepath1>imagem 1</imagepath1> 
    <imagepath2>imagem 2</imagepath2> 
    <imagepath3>imagem 3</imagepath3> 
    <location>Rua São Francisco Xavier, 390 - Tijuca - Rio de Janeiro - RJ</title> 
</auction> 
<auction> 
    <id>2</id> 
    <name>Leilão Barra</name> 
    <description>Cobertura ótimo estado. Leiloeiro responsável Leandro. Contato pelo tel: 3554-9356</description> 
    <date>2012-03-28</date> 
    <imagepath1>001</imagepath1> 
    <imagepath2>002</imagepath2> 
    <imagepath3>003</imagepath3> 
    <location>Avenida das Américas, 500 - Barra - Rio de Janeiro - RJ</title> 
</auction> 
<auction> 
    <id>3</id> 
    <name>Leilão Flamengo</name> 
    <description>Apartamento andar baixo. Localizado em frente ao metrô. Leiloeiro Marcel pelo tel 3554-6678</description> 
    <date>2012-03-18</date> 
    <imagepath1>im1</imagepath1> 
    <imagepath2>im2</imagepath2> 
    <imagepath3>im3</imagepath3> 
    <location>Avenida Oswaldo Cruz, 110 - Flamengo - Rio de Janeiro - RJ</title> 
</auction> 

这里是我的Objective-C代码部分：（错件评论）

-(void)viewDidLoad { 

[super viewDidLoad]; 
NSURL *url = [NSURL URLWithString:@"http://leandroprellapps.capnix.com/script.php"]; 
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithContentsOfURL:url]; 
allNames = [NSMutableArray arrayWithObjects: nil]; //declared as instance variable in .h file 
xmlParser.delegate = self; 
[xmlParser parse]; 
NSLog(@"%@",allNames); //getting wrong data here 
} 

//and later on 

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { 

// SUPPOSE TO READ ALL XML FILE AND FIND ALL "name" ELEMENTS 
if ([elementName isEqualToString:@"name"]) { 

    self.currentName = [[NSMutableString alloc] init];  
    } 
} 

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 

[self.currentName appendString:string]; //passing the value of the current elemtn to the string 
} 

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { 

if ([elementName isEqualToString:@"name"]) { 

    NSLog(@"%@", currentName); //show current element 
    [allNames addObject:currentName];//not only is not reading all xml "name" elements but also adding another elements not shown in above NSLog....   
    } 
} 

为了举例说明，这里是我的NSLog结果：

2012-03-06 22:51:37.622 Leilao Invest 2.0[10032:f803] Leilão Tijuca 

2012-03-06 22:51:37.623 Leilao Invest 2.0[10032:f803] (
"Leil\U00e3o Tijuca\n\t\tCasa de vila, \U00f3timo estado e \U00f3tima localiza\U00e7\U00e3o. Leiloeiro respons\U00e1vel: Fulano de Tal. Contato pelo telefone 3554-5555\n\t\t2012-03-06\n\t\timagem 1\n\t\timagem 2\n\t\timagem 3\n\t\tRua S\U00e3o Francisco Xavier, 390 - Tijuca - Rio de Janeiro - RJ" 

）

注意，第一NSLog显示当前元素的正确名称，但在第二NSLog，将当前元素后做我的MutableArray，它只显示所谓的“名”的第一个元素和一堆其他元素不应该被添加，并且它不保留字符串的编码（NSISOLating1）。

Answer 1

这是因为当解析器发现任何标签之间的东西时，foundCharacters函数会被调用。

在你的情况下，你的第一个标记是'id'，因为它不匹配名字，你的currentName没有初始化，因此当字符串currentName为零时，字符不会附加值'2'。然后第二个标签是名称，所以它符合您的条件并初始化字符串。从这一点，标签之间找到的每个字符都会附加到currentName。

如果您只想解析名称，一种方法是在将字符附加到currentName之前检查当前标记是否为'name'。

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict { 

    // SUPPOSE TO READ ALL XML FILE AND FIND ALL "name" ELEMENTS 
    if ([elementName isEqualToString:@"name"]) { 
     isNameTag = YES; 
     self.currentName = [[NSMutableString alloc] init];  
    } 
} 

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { 
    if (isNameTag) { 
     [self.currentName appendString:string]; //passing the value of the current elemtn to the string 
    } 
} 

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName { 

    if ([elementName isEqualToString:@"name"]) { 
     isNameTag = NO; // disable the flag 
     NSLog(@"%@", currentName); //show current element 
     [allNames addObject:currentName];//not only is not reading all xml "name" elements but also adding another elements not shown in above NSLog....   
    } 
}