Iphone 库xml委托选择器不工作

我在Lib-xml解析器中遇到了一个问题

在文档末尾，下面的代码在这里

-(void)endDocument 
{
    NSDictionary *userInfo = [NSDictionary dictionaryWithObject:@"Failed with 404 or 500"
                                                                 forKey:@"error_message"];
            NSError *error = [NSError errorWithDomain:@"ParsingDomain"
                                                 code:500
                                             userInfo:userInfo];

            SEL selector = @selector(parse:encounteredError: forId: forObj:);
            NSMethodSignature *sig = [(id)self.delegate methodSignatureForSelector:selector];
            if(nil != sig && [self.delegate respondsToSelector:selector]) // this codition is failed
            {
                printf("\n In the selector invocation");
                NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:sig];
                [invocation retainArguments];
                [invocation setTarget:self.delegate];
                [invocation setSelector:selector];
                [invocation setArgument:&self atIndex:2];
                [invocation setArgument:&error atIndex:3];
                [invocation setArgument:&Id atIndex:4];
                [invocation setArgument:&obj atIndex:5];
                [invocation performSelectorOnMainThread:@selector(invoke) withObject:NULL waitUntilDone:NO];
            }
    }

我在上面代码中对失败的条件进行了注释

谢谢,，

---

Madan mohan。

我想这行有拼写错误检查

SEL选择器=@selector（解析：遇到错误：forId:forObj:）

使用解析器而不是解析

！！！干杯