Question

我需要解析这个xml文件

<?xml version="1.0" encoding="UTF-8"?>
<imageset>
<category>
<image>SQUIRREL</image>
<image>FOX</image>  
<image>TIGER</image>    
<image>LION</image> 
</category>
</imageset>

我用这段代码来解析它。

- (void)viewDidLoad {
    NSXMLParser *parser = [[NSXMLParser alloc] initWithData:[NSData dataWithContentsOfFile:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"Config.xml"]]];
    [super viewDidLoad];
    [parser setDelegate:self];
    [parser parse];
    NSLog(@"test.......... %@",test);
    }
- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{            
    if ([elementName isEqualToString:@"image"]) {
        test = [[NSMutableArray alloc]init];
        addelements = TRUE;
    }
}
- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{     
    if ([elementName isEqualToString:@"image"]) {
        addelements = FALSE;
    }
}
- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
        [test addObject:string];
}

但它只添加了最后一个对象，在控制台中显示为这样。

test.......... (
    LION,
    "

",
    "
"
)

我需要在xml文件中添加所有图像名称，意思是{SQUIRREL，FOX，TIGER，LION}

我该怎么办，有人能帮我吗。

提前谢谢你。

Answer 1

您的问题在于这种方法：

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{            
    if ([elementName isEqualToString:@"image"]) {
        test = [[NSMutableArray alloc]init];
        addelements = TRUE;
    }
}

每次启动图像标记时，都会使用NSMutableArray的新实例覆盖测试变量（泄漏上一个对象）。您需要将其更改为以下内容：

        if (!test) test = [[NSMutableArray alloc]init];

也就是说：只有在没有旧数组的情况下才分配新数组。

Answer 2

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict{ 
    [mutableString release];
    mutableString  = [[NSMutableString alloc] init];           
    if ([elementName isEqualToString:@"image"]) {
        if( !test  )  test = [[NSMutableArray alloc] initWithCapacity: 10];
    }
}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{   
    if ([elementName isEqualToString:@"image"])  
        [test addObject: mutableString];
}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string{
       [mutableString appendString: string];
}

其中test和mutableString是在视图控制器的头中声明的ivar

注意：这是非常简化的版本。

Answer 3

@Mahesh Babu yes you can also add the image  by giving the name only as for example......    

[UIImage imageNamed:@"SQUIRREL.jpg"];

友情链接