NSMutableString + webService

Question

我正在尝试使用Web服务，但是当元素名称发生更改时，请更改所有其他名称...

-(void)callWebService {
    _estacionamentoAdd = [[Estacionamento alloc]init];
    NSString *url = @"http://urlfromws";
    NSMutableURLRequest *request =[[[NSMutableURLRequest alloc] init] autorelease];
    [request setURL:[NSURL URLWithString:url]];
    [request setHTTPMethod:@"GET"];

    NSURLConnection *conn=[[NSURLConnection alloc] initWithRequest:request delegate:self];
    if (conn) {
        webData = [[NSMutableData data] retain];
    }
    else
    {

    }
}

//获取响应值

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
    if(!soapResults)
    {
        soapResults = [[NSMutableString alloc] init];
    }
    NSLog(@"stringFound:%@", string);
    [soapResults setString:string];
}

//收到回复时

   - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName        namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
 {
     if(!soapResults)
    {
        soapResults = [[NSMutableString alloc] init];
  }


if( [elementName isEqualToString:@"id"])
{
 id = [soapResults intValue];
}
else if( [elementName isEqualToString:@"name"])
{
    name = soapResults;
}
else if( [elementName isEqualToString:@"adress"])
{
    adress = soapResults;

 }
[soapResults setString:@""];

    }

当元素名称为“name or adress”时，id和name等于adress

当elementName为id时... id = soapResults。好的，但是当elementName是Adress时，adress = soapResults并且id也会改变。为什么呢？

Answer 1

我只看到名称和地址总是@“”并且相同。

e.g。

...
name = soapResults; //NOT copied.. name and soapResults are the same object
... 
[soapResults setString:@""]; //affects name too, as they are the same 

相同的地址但不是id，因为那是一个整数，而不是一个对象

• name = address = soapResults ...

您可能想要复制值

name = [soapResults description];
...
address = [soapResults description];

---

其他问题：
不要在foundCharacters中使用[soapResults setString：newString]，使用appendString（foundCharacters被调用n次）

Answer 2

我解决了我的问题：

//始终释放NSMutableString

-(void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
if(soapResults) {
    [soapResults release];
    soapResults = nil;
}

    soapResults = [[NSMutableString alloc] init];

NSLog(@"stringFound:%@", string);
[soapResults appendString:string];

}