解析屬性XML

Question

我是iOS應用程序開發新手，遇到問題。

XML

<?xml version="1.0" encoding="UTF-8"?> 
<Books> 
    <Book id="1"> 
    <title_1>Circumference</title_1> 
    <author>Nicholas Nicastro</author> 
    <summary>Eratosthenes and the Ancient Quest to Measure the Globe.</summary> 
</Book> 
    <Book id="2"> 
    <title_1>Copernicus Secret</title_1> 
    <author>Jack Repcheck</author> 
    <summary>How the scientific revolution began</summary> 
</Book> 
    <Book id="3"> 
    <title_1>Angels and Demons</title_1> 
    <author>Dan Brown</author> 
    <summary>Robert Langdon is summoned to a Swiss research facility to analyze a cryptic symbol seared into the chest of a murdered physicist.</summary> 
</Book> 
    <Book id="4"> 
    <title_1>Keep the Aspidistra Flying</title_1> 
    <author>George Orwell</author> 
    <summary>A poignant and ultimately hopeful look at class and society, Keep the Aspidistra Flying pays tribute to the stubborn virtues of ordinary people who keep the aspidistra flying.</summary> 
</Book> 
</Books> 

CODE

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

    if([elementName isEqualToString:@"Books"]) 
    { 
     data_array = [[NSMutableArray alloc] init]; 
    } 
    else if([elementName isEqualToString:@"Book"]) 
    { 

     bookID= [[attributeDict objectForKey:@"id"]integerValue]; 

     NSLog(@"Reading id value :%d",bookID); 


    //NSLog(@"Processing Element: %@",elementName); 
    } 

} 

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


    if(!test_string) 
    { 
     test_string = [[NSMutableString alloc] initWithString:string]; 
} 
    else 
    { 
     [test_string appendString:string]; 
    } 
    //NSLog(@"Processing Value: %@",test_string); 

} 

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

    if([elementName isEqualToString:@"Books"]) 

     return; 

    if ([elementName isEqualToString:@"Book"]) 
    { 
     [data_array addObject:test_string]; 


    } 
    else 

    test_string = nil; 
     } 

如果我按照這個方法，然後它會跳過第一本書，並只顯示最後的三本書。

如果我把test_string=nil在if塊，而不是別的話，就說明它的作者姓名以及

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

    if([elementName isEqualToString:@"Books"]) 

     return; 

    if ([elementName isEqualToString:@"Book"]) 
    { 
     [data_array addObject:test_string]; 

     test_string = nil; 
     // data_array = nil; 
    } 

     } 

另外我也得到一些空間時，它顯示在我的表視圖。

Answer 1

更改didStartElement:方法，如：

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

    if([elementName isEqualToString:@"Books"]) 
    { 
     data_array = [[NSMutableArray alloc] init]; 
    } 
    else if([elementName isEqualToString:@"Book"]) 
    { 

     bookID= [[attributeDict objectForKey:@"id"]integerValue]; 
     test_string = nil; 
     NSLog(@"Reading id value :%d",bookID); 

    } 
    else if([elementName isEqualToString:@"title_1"]) 
    { 
     test_string = [[NSMutableString alloc] init]; 
    } 
} 

更改didEndElement:方法，如：

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

    if([elementName isEqualToString:@"Books"]) 

     return; 

    if ([elementName isEqualToString:@"title_1"]) 
    { 
     [data_array addObject:test_string]; 

     test_string = nil; 
    } 
} 

Answer 2

在這裏你可以看到一個良好的鏈接Attributed XML ParsingYou Can see the XML file .it looks similar your XML file教程。 在本教程中，他們將數據存儲在Model Object (NSObject Class)中。 而且每當他們需要時Data他們只是從Model Class獲得數據。

Here the tutorial Link...

我希望你可能會得到上述一些幫助的形式....