Objective-C如何将xml转换为字符串？

Question

这段代码有什么问题吗？它假设将 xml 数据转换为字符串并将其打印到日志中？但是它不打印任何内容!？

-(IBAction)request:(id)sender
{
    NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/public_timeline.xml"];
    theRequest   = [[NSMutableURLRequest alloc] initWithURL:url];
    theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
    receivedData=[[NSMutableData data] retain];

    NSString *s = [[NSString alloc] initWithData:receivedData encoding:NSUTF8StringEncoding];
    NSLog(@"%@", s);
    [s release];

//parser = [[NSXMLParser alloc] initWithData:receivedData];
//[parser setDelegate:self];
//[parser parse];
  }

还有想法吗？

提前致谢

Answer 1

receivedData=[[NSMutableData data] retain];

您正在初始化空数据，之后，url 连接和 url 请求将不再使用。初始化数据为空。